JP6667589B2 - Radiation image capturing apparatus, control method of radiation image capturing apparatus, and program - Google Patents

Description

  The present invention relates to a radiation image capturing apparatus that acquires a radiation image of a subject, and a control method and a program for the radiation image capturing apparatus.

  2. Description of the Related Art Conventionally, as disclosed in Patent Documents 1 to 3, for example, various radiation image capturing apparatuses using a movable radiation irradiation apparatus have been known. Such a radiographic image capturing apparatus is basically supported on a leg by accommodating a leg that can be driven by wheels, a battery for driving a radiation source, and an electric circuit related to driving of the radiation source. The patient is configured to irradiate the subject with radiation using a round-trip car-type radiation irradiating device including a main body, an arm connected to the main body, and a radiation source attached to the arm. .

  In addition, a radiation image capturing apparatus using a portable radiation irradiating apparatus, which is equipped with only a minimum radiation component such as a radiation source and an electric circuit and is operated by an operator by hand, has been proposed. ing. Such a portable radiation irradiating device is so light that it can be operated and held by a hand of an operator. ing.

  When a radiation image of a subject is captured by such a radiation image capturing apparatus, a radiation detector (so-called “Flat Panel Detector”) that records a radiation image representing the subject by irradiating radiation transmitted through the subject is usually used. ) Is used. As such a radiation detector, a cassette-type radiation detector in which a control unit such as an image detection unit, a driving battery, and an electric circuit related to driving is housed in a housing is well known. Then, such a radiation detector is arranged at a position facing the radiation irradiating device with the subject in between, and when the radiation irradiating device is driven in that state, the radiation transmitted through the subject can be detected by the radiation detector. And a radiation image represented by radiation transmitted through the subject is obtained.

  Further, in a radiation image capturing apparatus in which the radiation irradiating apparatus and the radiation detector are separate as described above, the object is photographed by a camera to represent the surface of the object, for recognition of an irradiation field or the like. A method of acquiring a captured image and displaying the captured image has been proposed (see Patent Documents 1 to 3). Further, in a radiation image capturing apparatus in which the radiation irradiating apparatus and the radiation detector are separate bodies, deviation between the radiation irradiation field and the detection range of the radiation detector is likely to occur. For this reason, Patent Literatures 1 to 3 also propose a method of superimposing and displaying a frame indicating a radiation irradiation field and a frame indicating a detection area of a radiation detector on a displayed captured image.

  In order to display the detection area of the radiation detector on the captured image as described above, it is necessary to detect the position of the radiation detector. For this reason, the position of the radiation detector is detected using a marker, an RF signal, or a combination of a reflection element and light or an electromagnetic signal, and the detection area of the radiation detector is superimposed on the captured image based on the detected position. A display method has been proposed (see Patent Document 4).

  Incidentally, radiation detectors are relatively expensive. For this reason, when performing imaging around a plurality of hospital rooms, a radiation detector is not prepared for each patient room, but is carried to the patient room together with the radiation irradiation device and used for acquiring a radiation image. A console for controlling imaging is provided for each hospital room, and a radiation detector to be used is registered in the console. On the other hand, unique identification information is given to the radiation detector, and identification information of the radiation detector to be used is input to the console at the time of imaging. The console uses the identification information to determine whether the radiation detector to be used is a registered radiation detector. If it is confirmed that the radiation detector to be used is a registered radiation detector, wireless or wired communication is performed between the radiation detector and the console to exchange radiation images and various information. Is performed. At this time, the identification information is input by connecting the console and the radiation detector with a cable and transmitting the identification information of the radiation detector to the console, or by inputting the identification information of the radiation detector directly to the console. Or by inputting identification information to the console using a remote controller or the like.

JP 2009-131323 A JP 2007-029353 A JP 2010-119485 A JP-T-2013-524777A

  However, it is very troublesome to connect the radiation detector and the console as described above and to input the identification information of the radiation detector to the console every time imaging is performed.

  The present invention has been made in view of the above circumstances, and provides a radiation image capturing apparatus, and a control method and a program for the radiation image capturing apparatus, which enable easy input of identification information of a radiation detector. Aim.

A radiation image capturing apparatus according to the present invention includes a radiation source that irradiates a subject with radiation,
Imaging means for imaging the subject to obtain a captured image of the subject,
A radiation detector for detecting radiation transmitted through a subject and generating a radiation image of the subject, wherein the radiation detection surface is provided with a marker indicating identification information for identifying the radiation detector on a radiation detection surface side. And identification information acquisition means for acquiring identification information of the radiation detector from the marker when the marker is detected from the captured image.

  The “image of the subject” is an image representing the surface of the subject and the surface of an object around the subject within the imaging range of the imaging unit. In addition, an infrared image representing the temperature distribution of the surface of the subject and the surface of the object around the subject, which is acquired by imaging the subject using infrared rays, is also included in the captured image of the subject.

  In the radiation image capturing apparatus according to the present invention, the radiation source and the image capturing unit may be provided integrally.

  "Integrally" means that the radiation source and the imaging means are provided so as to be integral with each other. For example, if the radiation source and the imaging means are provided in the same housing, radiation The source and the imaging means are provided integrally.

  Further, the radiation image capturing apparatus according to the present invention may further include an identification unit for identifying the radiation detector based on the identification information.

  Further, in the radiographic image capturing apparatus according to the present invention, the marker may be provided on a portion other than the detection area for detecting the radiation on the detection surface side.

  The “portion other than the detection area for detecting radiation on the detection surface side” may be, for example, a frame portion around the detection area for detecting radiation in the radiation detector.

  In the radiographic imaging apparatus according to the present invention, the surface of the radiation detector, which includes a detection area for detecting radiation, has a rectangular shape, and each of the plurality of markers has a different side on the surface including the detection area. And at least one of the vicinity of different corners.

  “Nearby” means that it is near at least one of the side and the corner of the rectangular surface including the detection area. Specifically, the marker may be in contact with at least one of the side and the corner, and may be separated from at least one of the side and the corner so as not to hinder the detection of radiation on the surface including the detection region.

  Further, in the radiographic image capturing apparatus according to the present invention, the marker may be composed of a barcode. The barcode may be one-dimensional or two-dimensional.

  Further, in the radiographic image capturing apparatus according to the present invention, the marker may represent different color information for each type of radiation detector as identification information.

  Further, in the radiographic image capturing apparatus according to the present invention, the marker may include a light emitting device, and the light emitting device may indicate the identification information by at least one of a color of emitted light, a light lighting pattern, and a light blinking pattern.

  In the radiation imaging apparatus according to the present invention, the light emitting device further represents the detector information of the radiation detector by at least one of a color of emitted light, a lighting pattern of light, and a blinking pattern of light. Is also good.

  In the radiographic image capturing apparatus according to the present invention, when a marker is detected, a relative positional relationship between the radiation detector and the radiation source is acquired based on at least one of the size and the shape of the marker in the captured image. May be further provided.

  Further, in the radiographic image capturing apparatus according to the present invention, another marker indicating that the surface is opposite to the detection surface is provided on the surface of the radiation detector opposite to the radiation detection surface. It may be a thing.

A method for controlling a radiation image capturing apparatus according to the present invention includes a radiation source that irradiates a subject with radiation,
A control method for a radiographic image capturing apparatus, comprising: an imaging unit configured to capture an image of a subject to obtain a captured image of the subject,
A radiation detector that detects radiation transmitted through the subject and generates a radiation image of the subject, and detects a marker representing identification information for identifying the radiation detector on the radiation detection surface side from the captured image,
When a marker is detected, identification information of the radiation detector is obtained from the marker.

  The control method of the radiation image capturing apparatus according to the present invention may be provided as a program for causing a computer to execute the method.

  According to the present invention, a marker of a radiation detector is detected from a captured image, and when the marker is detected, identification information of the radiation detector is acquired from the marker. Therefore, the identification information of the radiation detector can be input to the console or the like only by photographing the radiation detector by the imaging means. Therefore, it is possible to reduce the burden on the operator of inputting identification information of the radiation detector to the console.

Schematic diagram of a radiographic image capturing apparatus according to an embodiment of the present invention Front perspective view of radiation irradiation device Rear perspective view of radiation irradiation device Schematic block diagram showing the internal configuration of the radiation irradiation device External perspective view of the radiation detector viewed from the front, which is the radiation irradiation side. Schematic block diagram showing the internal configuration of the radiation detector External perspective view of a radiation detector provided with an LED as a marker as viewed from the front, which is the radiation irradiation side. Schematic block diagram showing the internal configuration of the console FIG. 3 is a diagram showing a captured image including only the subject FIG. 3 is a diagram illustrating a captured image including a part of a radiation detector in addition to a subject Flow chart showing processing performed in the present embodiment Flow chart showing processing performed in the present embodiment Diagram showing change in irradiation field according to body thickness of subject Diagram showing a captured image on which various information is superimposed Diagram for explaining acquisition of radiation detector position information based on motion information The figure which shows the picked-up image on which the information showing the direction where a radiation detector exists was superimposed. A diagram showing a state where the center position of the irradiation field region and the center position of the detection region are matched. A diagram showing a state in which the irradiation field region and the detection region are matched. Diagram showing icons of thin person, normal body person, fat person, etc. Schematic block diagram showing another example of the internal configuration of the radiation irradiation apparatus Diagram showing a distorted marker External perspective view of the radiation detector viewed from the back Perspective view showing the overall shape of a radiation irradiation device that can be run Side view showing the state when using the radiation irradiation device that is enabled to travel

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram of a radiation image capturing apparatus according to an embodiment of the present invention. As shown in FIG. 1, the radiation image capturing apparatus 1 according to the present embodiment includes a portable radiation irradiation device 10, a radiation detector 30, and a console 50. Then, in order to acquire a radiation image of the subject H lying on the bed 2, the radiation detector 30 is inserted between the subject H and the bed 2, and the portable radiation irradiation apparatus 10 transfers the radiation detector 30 to the subject H. The radiation detector 30 irradiates the radiation to the radiation detector 30 to acquire a radiation image of the subject H. The console 50 is connected to a terminal 80 such as a doctor via a network.

  2 is a front perspective view of the radiation irradiation apparatus, FIG. 3 is a rear perspective view of the radiation irradiation apparatus, and FIG. 4 is a schematic block diagram showing an internal configuration of the radiation irradiation apparatus. As shown in the figure, the radiation irradiating apparatus 10 is provided with an emission window 12 from which radiation is emitted, a camera 13 for photographing the surface of the subject H, and a distance sensor 27 on the front surface of a rectangular parallelepiped casing 11. ing. In addition, a collimator 14 for narrowing the irradiation range of the radiation is visible from the emission window 12. A monitor 15 made of a liquid crystal or the like is provided on the rear surface of the housing 11. The monitor 15 displays a captured image acquired by the camera 13 capturing an image of the surface of the subject H, a radiation image of the subject H, various information for setting the radiation irradiation device 10, and the like. The distance sensor 27 measures the distance between the device 10 and the target object by laser or ultrasonic waves. Note that the camera 13 and the monitor 15 correspond to a photographing unit and a display unit, respectively.

  Holders 16 and 17 are attached to both sides of the housing 11, respectively. The grip 16 includes two protruding portions 16A that protrude laterally from upper and lower portions of the side surface of the housing 11, and a connecting portion 16B that connects the two protruding portions 16A. The holding portion 17 includes two projecting portions 17A that project laterally from upper and lower portions of the side surface of the housing 11, and a connecting portion 17B that connects the two projecting portions 17A. The protruding portions 16A, 17A are curved from the protruding positions 11A, 11B toward the rear surface of the housing 11. Instead of bending, the protrusions 16A, 17A may be inclined from the protrusion positions 11A, 11B toward the rear surface of the housing 11. The operator can move the radiation irradiating device 10 to a position where the subject H can be imaged by holding the grips 16 and 17. An imaging button 18 for emitting radiation and imaging the subject H is provided on the upper protrusion 17A of the gripping portion 17 that the operator holds with the right hand when performing imaging. .

  The housing 11 includes a monitor 15, a radiation source 19, an irradiation control unit 20, a collimator control unit 21, an imaging control unit 22, a drive control unit 23, an input unit 24, a communication unit 25, a battery 26, a distance sensor 27, and a motion sensor. 28 and an irradiation field lamp 29 are accommodated. Thereby, the radiation source 19 and the camera 13 as the imaging means are provided integrally. The irradiation control unit 20, the collimator control unit 21, the imaging control unit 22, the drive control unit 23, and the communication unit 25 are configured by a program (software) operating on a computer, dedicated hardware, or a combination of both. . The program is recorded on a recording medium such as a DVD (Digital Versatile Disc) or a CD-ROM (Compact Disk Read Only Memory) and distributed, and is installed in the radiation irradiation apparatus 10 from the recording medium. Alternatively, it is stored in a storage device of a server computer connected to a network or a network storage in a state where it can be accessed from the outside, and is downloaded and installed in the radiation irradiation apparatus 10 as required.

  The radiation source 19 includes, for example, an X-ray tube, a booster circuit, and a cooling unit for cooling the X-ray tube.

  The irradiation control unit 20 drives the radiation source 19 to irradiate the subject H with radiation so that the subject H is irradiated with radiation having an intensity corresponding to a preset imaging condition for a set time. Control the amount. The imaging conditions are a tube voltage (kV value) and a mAs value (tube current × irradiation time) according to the body thickness of the subject H. Note that the body thickness of the subject H is a SID (Source Image receptor Distance) which is a distance between the device 10 and the surface of the radiation detector 30 and a distance between the device 10 and the surface of the subject H by the distance sensor 27. It can be obtained by measuring SOD (Source Object Distance) and subtracting SOD from SID. Note that the operator may measure the body thickness and input information for setting imaging conditions including the measured body thickness from the input unit 24 to the device 10. In the present embodiment, information for setting the imaging conditions such as the body thickness is transmitted to the console 50, the imaging conditions are set on the console 50, and the set imaging conditions are transmitted to the radiation irradiation apparatus 10. You. The irradiation control unit 20 controls irradiation of the subject H with radiation using the imaging conditions transmitted from the console 50.

  The collimator control unit 21 includes a driving mechanism such as a motor for driving the collimator 14 to change the irradiation field of the radiation emitted from the radiation source 19 to the subject H, and an electric circuit for controlling the driving mechanism. ing. The collimator control unit 21 controls the driving of the collimator 14 according to an instruction from the drive control unit 23.

  The photographing control unit 22 drives the camera 13 to photograph the surface of the subject H, and acquires a photographed image G1. Further, the imaging control unit 22 may perform image processing on the captured image G1 acquired by the camera 13 to improve image quality. Note that the captured image G1 acquired by the camera 13 is a moving image having a predetermined frame rate of, for example, 30 fps.

  The drive control unit 23 controls the entire drive of the radiation irradiation device 10. That is, the drive control unit 23 instructs the irradiation control unit 20 to drive the radiation source 19, instructs the collimator control unit 21 to drive the collimator 14, and instructs the imaging control unit 22. A process of driving the camera 13 to acquire the captured image G1, a process of displaying various information including the captured image G1 on the monitor 15, a process of instructing the communication unit 25 to exchange various information with the console 50, a process of A process of monitoring the state, a process of receiving an instruction from the input unit 24, a process of measuring the distance between the radiation irradiation device 10 and an object by the distance sensor 27, and a process of detecting the movement of the radiation irradiation device 10 by the motion sensor 28 And so on. Each of the above-described processes is performed according to an instruction from the input unit 24 or an instruction transmitted from the console 50 and received by the communication unit 25.

  The input unit 24 is a touch panel type input unit integrated with the monitor 15, and receives an instruction from an operator and outputs information representing the instruction to the drive control unit 23. Note that the photographing button 18 is also included in the input unit 24.

  The communication unit 25 wirelessly communicates with the console 50 to exchange information. Instead of wireless communication, the radiation irradiating apparatus 10 and the console 50 may be connected by a cable to exchange information by wire. In the latter case, the communication unit 25 has a connector to which a cable is connected.

  The motion sensor 28 is a nine-axis motion sensor that detects three-axis acceleration, three-axis angular velocity, and three-axis tilt. The acceleration, angular velocity, and inclination detected by the motion sensor 28 are output to the drive control unit 23 as motion information, used for controlling the radiation irradiation apparatus 10 during imaging, and transmitted from the communication unit 25 to the console 50. Note that the tilt is a tilt based on a position held horizontally with the radiation irradiating apparatus 10 in a state where the radiation irradiating axis which is the axis coinciding with the radiation irradiating direction coincides with the direction in which gravity acts.

  The irradiation field lamp 29 is composed of a light emitting element that emits visible light such as a light bulb or an LED (Light Emitting Diode), and is controlled on and off by the drive control unit 23. When the irradiation field lamp 29 is turned on, the irradiation field irradiated with the radiation on the subject H is irradiated with visible light.

  Next, the configuration of the radiation detector 30 will be described. FIG. 5 is an external perspective view of the radiation detector as viewed from the front side on the radiation irradiation side, and FIG. 6 is a schematic block diagram showing the internal configuration of the radiation detector.

  As shown in FIG. 5, the radiation detector 30 is a rectangular cassette-type radiation detector including a housing 32 that accommodates the image detection unit 31. As is well known, the image detection unit 31 includes a scintillator (phosphor) that converts incident radiation into visible light, and a TFT (Thin Film Transistor) active matrix substrate. On the TFT active matrix substrate, a rectangular imaging region in which a plurality of pixels that accumulate charges according to visible light from the scintillator are arranged is formed. The housing 32 includes, in addition to the image detection unit 31, a gate driver that applies a gate pulse to the gate of the TFT to switch the TFT, and converts charges accumulated in the pixel into an analog electric signal representing an X-ray image. A photographing control unit 35 having a signal processing circuit and the like for outputting the image data is built in.

  The housing 32 has a rectangular parallelepiped shape including a front surface 32A on the detection surface side on which radiation enters, a back surface 32B facing the front surface 32A, and four side surfaces 32C, 32D, 32E, and 32F. The housing 32 is formed of, for example, a conductive resin, and also functions as an electromagnetic shield that prevents electromagnetic noise from entering the radiation detector 30 and radiation of electromagnetic noise from inside the radiation detector 30 to the outside. The casing 32 has a size, for example, conforming to the international standard ISO (International Organization for Standardization) 4090: 2001, which is almost the same as a film cassette, an IP (Imaging Plate) cassette, or a CR (Computed Radiography) cassette.

  A transmission plate 33 for transmitting radiation is attached to a front surface 32A of the housing 32. The transmission plate 33 has a size substantially matching the detection area of the radiation detector 30 for detecting radiation, and is made of a carbon material that is lightweight, has high rigidity, and has high radiation transmittance.

  Markers 34A to 34D representing identification information for identifying the radiation detector 30 are provided at four corners of the front surface 32A of the housing 32. Here, as the identification information, information representing at least one of an ID number for identifying the individual of the radiation detector 30, a production number, and a size or a type of the radiation detector 30 can be used. In the present embodiment, each of the markers 34A to 34D is composed of two orthogonal one-dimensional barcodes. The two bar codes are given to portions other than the detection area on the front surface 32A of the radiation detector 30 so as to define four corners of the radiation detection area in the radiation detector 30. Thereby, each of the markers 34A to 34D is provided near different corners on a plane including the detection area of the radiation detector 30. In addition, as long as the radiation detector 30 can be identified, a marker that represents different color information as identification information for each type of radiation detector may be used. For example, a tape or the like provided with a unique color on the radiation detector 30 may be used as a marker. In this case, the radiation detector 30 can be identified by the color of the marker.

  Here, the markers 34 </ b> A to 34 </ b> D are configured by pairing two barcodes. In the present embodiment, one of the two barcodes is stored in the radiation detector 30. Information indicating the up-down direction of the image detection unit 31 is included. In the present embodiment, the side on which the markers 34A and 34B are provided is the upper side, that is, the top side. Therefore, in the present embodiment, when the side on which the markers 34A and 34B are provided and the side on which the markers 34C and 34D are provided are defined in the radiation detector 30, the two sides are orthogonal to the two sides. The direction from the side on which the markers 34C and 34D are provided to the side on which the markers 34A and 34B are provided along the straight line is the vertical direction. The vertical direction means a direction on the radiation detector 30 and does not mean a direction in which gravity acts.

  Note that a light emitting element such as an LED that emits a color unique to the radiation detector 30 may be used as a marker. In this case, the radiation detector 30 can be identified by the color of the light emitting element. Also, as shown in FIG. 7, by providing markers 40A to 40D each including a plurality of light emitting elements at four corners of the detection area of the radiation detector 30, a lighting pattern of the light emitting elements, a blinking pattern, and a color of emitted light. The radiation detector 30 can be identified by at least one of the following. Note that the light-emitting element corresponds to a light-emitting device.

  Further, the marker is not limited to a barcode or a light emitting element as long as it can detect at least the position of the marker in the captured image G1, and for example, a symbol or a character may be used as the marker.

  The housing 32 houses the image detection unit 31, the imaging control unit 35, the drive control unit 36, the communication unit 37, the motion sensor 38, and the battery 39. Note that the imaging control unit 35, the drive control unit 36, and the communication unit 37 are configured by a program (software) operating on a computer, dedicated hardware, or a combination of both. Note that the program is installed in the radiation detector 30 in the same manner as the radiation irradiation device 10 described above.

  The imaging control unit 35 includes the gate driver and the signal processing circuit as described above, controls the driving thereof, generates an analog image signal representing the radiation image G2, and outputs the analog image signal to the drive control unit 36.

  The drive control unit 36 controls the entire drive of the radiation detector 30. That is, the drive control unit 36 instructs the imaging control unit 35 to generate an image signal representing the radiation image G2, and instructs the communication unit 37 to transmit the image signal representing the radiation image G2 and various information to the console 50. And a process of detecting the movement of the radiation detector 30 by the motion sensor 38, a process of monitoring the state of the battery 39, and the like.

  The communication unit 37 wirelessly communicates with the console 50 to exchange information. Instead of wireless communication, the radiation detector 30 and the console 50 may be connected by a cable, and information may be exchanged by wire. In the latter case, the communication section 37 has a connector to which a cable is connected.

  The motion sensor 38 is a nine-axis motion sensor that detects three-axis acceleration, three-axis angular velocity, and three-axis tilt. The acceleration, angular velocity, and inclination detected by the motion sensor 38 are output to the drive control unit 36 as motion information, and transmitted from the communication unit 37 to the console 50. Note that the tilt is a tilt based on the position where the radiation detector 30 is held horizontally.

  FIG. 8 is a schematic block diagram showing the internal configuration of the console. As shown in FIG. 8, the console 50 includes a radiation imaging data processing unit 51, an image processing unit 52, an output unit 54, a storage unit 55, an input unit 56, a communication unit 57, a monitor 58, and a control unit 59. The radiation imaging data processing unit 51, the image processing unit 52, the communication unit 57, and the control unit 59 are configured by a program (software) operating on a computer, dedicated hardware, or a combination of both. The program is installed on the console 50 as in the case of the radiation irradiation apparatus 10.

  The radiation imaging data processing unit 51 performs data processing such as A / D conversion on an image signal representing the radiation image G2 of the subject H input from the radiation detector 30. The radiation imaging data processing unit 51 outputs radiation image data representing the digital radiation image G2 after the data processing.

  The image processing unit 52 performs predetermined image processing on the radiation image data output by the radiation imaging data processing unit 51 using the image processing parameters stored in the storage unit 55. The image processing performed by the image processing unit 52 includes, for example, pixel defect correction, creation of a defect map for performing the pixel defect correction, image correction including offset correction, gain correction using a predetermined uniform exposure image, and shading correction. Correction of radiographic image data by application data), further, gradation correction processing, density correction processing, processing to remove scattered radiation caused by radiation transmitted through the subject H, and image display for monitor display and print output. Various image processing such as data conversion for converting data can be performed. From the image processing unit 52, radiation-processed radiation image data is output.

  The output unit 54 outputs the radiation-processed image data input from the image processing unit 52 after the image processing. The output unit 54 is, for example, a printer that prints out a radiation image or a storage device that stores radiation image data.

  The storage unit 55 stores the size of the detection area of the radiation detector 30, image processing parameters for image processing performed by the image processing unit 52, the type of the radiation detector 30 for setting imaging conditions, and the body thickness of the subject H. It stores parameters corresponding to the above, various kinds of information necessary for processing in the console 50, and the like, and stores the radiation image G2 output from the image processing unit 52, the captured image G1 transmitted from the radiation irradiation apparatus 10, and the like. The storage unit 55 may be a semiconductor memory or a recording medium such as a hard disk. Further, it may be built in the console 50, or may be arranged outside and used by connecting to the console 50.

  The input unit 56 includes a keyboard and the like for performing various inputs to the console 50. Note that the input unit 56 may be a touch panel.

  The communication unit 57 wirelessly communicates with the radiation irradiation apparatus 10 and the radiation detector 30 to exchange information. Instead of wireless communication, the console 50 may be connected to the radiation irradiating device 10 and the radiation detector 30 by a cable to exchange information by wire. In the latter case, the communication unit 57 has a connector to which a cable is connected.

  The monitor 58 is composed of a liquid crystal panel or the like, and displays various information related to the console 50, the radiation image G2 transmitted from the radiation detector 30, and the photographed image G1 if necessary.

  The control unit 59 controls the entire driving of the console 50. That is, the control unit 59 instructs the radiation imaging data processing unit 51 to acquire the radiation image G2, instructs the image processing unit 52 to perform image processing on the radiation image G2, and detects the detected markers 34A to 34A. 34D, a process of acquiring the identification information of the radiation detector 30, a process of identifying the radiation detector 30 based on the identification information, a process of detecting the position of the radiation detector in the captured image G1, and the output unit 54 A process of outputting the radiation image G2, a process of instructing the communication unit 57 to exchange various information with the radiation irradiation device 10 and the radiation detector 30, a process of receiving an instruction from the input unit 56, and a process of transmitting various information to the monitor 58. The processing for displaying is performed. The control unit 59 corresponds to the identification information acquisition unit and the identification unit.

  Hereinafter, detection of the radiation detector 30 in the captured image G1 will be described. When acquiring a radiation image of the subject H, the operator points the radiation irradiating apparatus 10 at the subject H and shoots the subject H with the camera 13. In the present embodiment, it is assumed that the chest of the subject H is imaged. For this reason, before imaging, the captured image G1 includes the chest of the subject H as shown in FIG. Then, when the radiation detector 30 is inserted between the bed 2 and the subject H in order to acquire the radiation image G2 of the subject H, as shown in FIG. A part of the radiation detector 30 is included. Here, markers 34A to 34D are provided at four corners of the radiation detector 30. The control unit 59 detects any of the markers 34A to 34D from the captured image G1, and determines that the radiation detector 30 is included in the captured image G1 when any of the markers 34A to 34D is detected from the captured image G1. I do.

  On the other hand, the control unit 59 transmits radiation detector position information indicating the position of the radiation detector 30 in the captured image G1 from the communication unit 57 to the radiation irradiation device 10. The radiation detector position information is a coordinate position indicating the position of a corner of the detection area of the radiation detector 30 on the captured image G1. In the present embodiment, the size of the detection area of the radiation detector 30 is stored in the storage unit 55 in advance. The control unit 59 obtains radiation detector position information from any of the positions of the markers 34A to 34D detected from the captured image G1 and the size of the detection area. Also, if the radiation detector position information is known, the information of the center position of the radiation detector 30 can be calculated from the size of the detection area of the radiation detector 30. For this reason, the control unit 59 also transmits the center position information indicating the center position of the radiation detector 30 to the radiation irradiation device 10. In addition, the direction of the radiation detector 30 is recognized from any of the markers 34A to 34D, and information on the direction of the radiation is also transmitted to the radiation irradiation device 10.

  When any of the markers 34A to 34D is detected from the captured image G1, the control unit 59 acquires the identification information of the radiation detector 30 from any of the markers 34A to 34D. The control unit 59 identifies the radiation detector using the identification information. Specifically, it is determined whether or not the radiation detector 30 is a radiation detector to be used. Here, the type of the radiation detector to be used is registered in the console 50 in advance. That is, the identification information of the radiation detector to be used is stored in the storage unit 55 as registered identification information. The control unit 59 compares the identification information of the radiation detector 30 with the registered identification information stored in the storage unit 55, and determines whether the obtained identification information is the registered identification information. When this determination is affirmed, the control unit 59 transmits the identification information to the radiation irradiation device 10. In the radiation irradiation apparatus 10, identification information is displayed on the monitor 15 as described later. On the other hand, if the determination is negative, the control unit 59 transmits to the radiation irradiation apparatus 10 information indicating that the radiation detector 30 is not a radiation detector to be used. The radiation irradiation device 10 issues a warning that the radiation detector 30 is not a radiation detector to be used. Specifically, a text or the like indicating that the radiation detector 30 is not the radiation detector to be used is displayed on the monitor 15. Thereby, the operator can take measures such as replacing the radiation detector. In the console 50, the identification information of the radiation detector 30 currently used may be registered again. Thereby, the work of replacing the radiation detector 30 can be omitted.

  Next, processing performed in the present embodiment will be described. FIG. 11 and FIG. 12 are flowcharts showing processing performed in the present embodiment. In the radiation imaging apparatus of the present embodiment, two operators handle the radiation irradiation device 10 and the radiation detector 30, respectively, to position the radiation detector 30 behind the subject H, Pre-shooting work for setting the image data, and the photographing is performed after the pre-shooting work is completed. First, the radiation irradiation apparatus 10 is held above the subject H, the subject H is photographed by the camera 13, and a photographed image G1 of the subject H is obtained (step ST1). The radiation irradiation apparatus 10 transmits the captured image G1, the SID, the SOD, and the information on the irradiation field defined by the collimator 14 to the console 50 (transmission of captured images and the like: step ST2). Further, to the console 50, information indicating the driving status of the radiation detector 30, information indicating the remaining amount of the battery of the radiation detector 30, motion information detected by the motion sensor 38, and the like are transmitted from the radiation detector 30. (Detector information transmission: step ST3).

  The control unit 59 of the console 50 determines whether or not the radiation detector 30 is included in the captured image G1 by detecting any of the markers 34A to 34D from the captured image G1 (step ST4). As shown in FIG. 9, when none of the markers 34A to 34D is detected from the captured image G1 and, as a result, when the radiation detector 30 is not included in the captured image G1, step ST4 is denied and the process returns to step ST1. . As shown in FIG. 10, any one of the markers 34A to 34D is detected from the captured image G1, and as a result, if the captured image G1 includes the radiation detector 30, step ST4 is affirmed and the control unit 59 Radiation detector position information indicating the position of the radiation detector 30 on the captured image G1, including the identification information of the radiation detector 30, based on one of the markers 34A to 34D of the radiation detector 30 included in the captured image G1. Then, information indicating the top and bottom directions of the radiation detector 30 and information related to the radiation detector 30 including the center position information of the radiation detector 30 are obtained (step ST5).

  The control unit 59 identifies the radiation detector 30 by determining whether the acquired identification information is the identification information of the radiation detector to be used (step ST6). When the acquired identification information is not the identification information of the radiation detector to be used (step ST6: No), the control unit 59 transmits information to the radiation irradiation apparatus 10 that the radiation detector 30 is not the radiation detector to be used. . The radiation irradiation apparatus 10 issues a warning that the radiation detector 30 is not a radiation detector to be used (step ST7). When the acquired identification information is identification information of a radiation detector to be used (step ST6: affirmative), the process proceeds to step ST8.

  On the other hand, the control unit 59 calculates the body thickness of the subject H by subtracting the SOD from the SID, and sets the imaging condition from the body thickness. Note that the imaging conditions may be set according to the site of the subject H included in the captured image G1. The information on the site of the subject H may be obtained by receiving an input from the operator in the radiation irradiation apparatus 10 or may be obtained by receiving an input from the input unit 56 of the console 50. Further, the scintillator used in the image detecting section 31 accommodated in the radiation detector 30 has a radiation quality (high or low) suitable for the type of the scintillator. For this reason, the imaging conditions may be set according to the material of the scintillator used for the image detection unit 31 housed in the radiation detector 30 in addition to the body thickness. In this case, a table in which the information of the scintillator used in the image detection unit 31 and the imaging conditions corresponding to the identification information of the radiation detector 30 may be stored in the storage unit 55. This makes it possible to set imaging conditions according to the identification information of the radiation detector 30 acquired from the captured image G1 with reference to the table. Further, when imaging information when the same subject H is imaged using the same radiation irradiation apparatus 10 and the same radiation detector 30 is stored, the imaging conditions may be set in consideration of the information. .

  Here, as shown in FIG. 13, the size of the irradiation field of the radiation radiated from the radiation irradiating apparatus 10 is different depending on whether the body thickness of the subject H is large or small. Specifically, the smaller the body thickness, the larger the irradiation field. For this reason, the control unit 59 calculates the body thickness of the subject H from the SID and the SOD, and further, based on the information on the range defined by the collimator 14 transmitted from the radiation irradiation apparatus 10, the center position of the irradiation field area. And information related to the irradiation field consisting of information on the size and size. Then, the control unit 59 transmits the detector information, the detector-related information, the irradiation field-related information, and the imaging condition to the radiation irradiation apparatus 10 (information transmission: step ST8). As described above, the identification information is transmitted when the acquired identification information is identification information of a radiation detector to be used.

  Based on the information transmitted from the console 50, the drive control unit 23 of the radiation irradiation device 10 adds identification information of the radiation detector 30, drive status of the radiation detector 30, to the captured image G1 displayed on the monitor 15, The vertical direction of the radiation detector 30, the battery level of the radiation detector 30, the area corresponding to the radiation detector 30, the center position of the radiation detector 30, and the radiation field of the radiation regulated by the collimator 14 are superimposed and displayed ( Information display: step ST9).

  FIG. 14 is a diagram illustrating a captured image G1 on which various types of information are superimposed. As shown in FIG. 14, the captured image G1 displayed on the monitor 15 includes a text (here, “standby”) 60 indicating the driving status of the radiation detector 30, an arrow 61 indicating the vertical direction of the radiation detector 30, An icon 62 indicating the remaining battery level of the radiation detector 30, a detection region 63 corresponding to the detection region of the radiation detector 30, a center position 64 of the radiation detector 30, an irradiation field region 65, a center position 66 of the irradiation field region 65, And the text 70 of Detector1, which is the identification information of the radiation detector 30, is superimposed and displayed. The irradiation field area 65 also displays the center position 66 of the irradiation field. Preferably, the detection area 63 and the irradiation field area 65 are displayed so as to be distinguishable. For example, it is preferable that the color of the detection region 63 and the color of the irradiation field region 65 be different. The color may be specified by an instruction from the console 50.

  Here, in the present embodiment, since markers are provided at the four corners of the radiation detector 30, even if a part of the radiation detector 30 is hidden by the subject H as shown in FIG. The image G1 includes one of the markers.

  Further, in the console 50, the control unit 59 detects the color of the clothing of the subject H from the captured image G1, and specifies the colors of the detection area 63 and the irradiation field area 65 so as to be different from the clothing. Is preferred. Accordingly, it is possible to prevent the detection area 63 and the irradiation field area 65 superimposed on the captured image G1 from being mixed into the clothes of the subject H.

  Then, the subject H is continuously photographed by the camera 13 of the radiation irradiation apparatus 10 to obtain a photographed image G1 of the subject H, and the radiation irradiation apparatus 10 transmits the photographed image G1 to the console 50 (transmitted photographed image: step). ST10). The radiation detector 30 continuously transmits information indicating the driving state of the radiation detector 30, information indicating the remaining amount of the battery of the radiation detector 30, motion information detected by the motion sensor 38, and the like.

  The control unit 59 of the console 50 determines whether or not any of the markers 34A to 34D is included in the captured image G1 to continuously determine whether or not the radiation detector 30 is included in the captured image G1 ( Step ST11). If step ST11 is affirmed, the control unit 59 continuously determines the position of the radiation detector 30 in the captured image G1 based on any of the markers 34A to 34D provided to the radiation detector 30 included in the captured image G1. The transmitted radiation detector position information is transmitted (step ST12). The drive control unit 23 of the radiation irradiation apparatus 10 superimposes and displays the detection area 63 of the radiation detector 30 on the captured image G1 based on the radiation detector position information transmitted from the console 50 (information display: step ST13).

  On the other hand, when the radiation detector 30 is moved after the radiation detector 30 is included in the captured image G1, the radiation detector 30 moves to a position outside the angle of view of the camera 13, and the radiation detection 30 is included in the captured image G1. The container 30 may not be included. When the radiation detector 30 is completely hidden by the subject H, the captured image G1 does not include the radiation detector. In such a case, since the markers 34A to 34D are not included in the captured image G1, the position of the radiation detector 30 cannot be specified only from the captured image G1. In this case, step ST11 is denied. If step ST11 is denied, the control unit 59 of the console 50 acquires radiation detector position information based on the motion information of the radiation detector 30 detected by the motion sensor 38 and transmitted from the radiation detector 30. Is transmitted to the radiation irradiation device 10 (step ST14).

  FIG. 15 is a diagram for describing acquisition of radiation detector position information based on motion information. 15, the position of any of the markers 34A to 34D in the radiation detector 30 when the captured image G1 includes any of the markers 34A to 34D of the radiation detector 30 is set as the reference position P1. Then, the movement amount M1 of the radiation detector 30 from the reference position P1 is calculated using the motion information and the size of the detection area of the radiation detector 30. Then, radiation detector position information is acquired based on the calculated movement amount M1. Thus, even if the captured image G1 no longer includes the radiation detector 30, the position of the radiation detector 30 can be tracked. Therefore, as shown in FIG. 15, the detection area 63 and the center position 64 of the radiation detector 30 can be superimposed on the captured image G1.

  Note that, after it is determined that any of the markers 34A to 34D is included in the captured image G1, it is determined that any of the markers 34A to 34D is not included in the captured image G1, that is, the radiation is included in the captured image G1. When the radiation detector 30 is not included in the captured image G1 after the detector 30 is included, the radiation detector 30 is used by using the radiation detector position information obtained based on the motion information of the radiation detector 30. May be displayed on the captured image G1. FIG. 16 is a diagram illustrating a captured image in which information indicating the direction in which the radiation detector 30 exists is superimposed on various types of information. In FIG. 16, the position where the radiation detector 30 exists is indicated by a virtual line. As shown in FIG. 16, in the captured image G1 displayed on the monitor 15, in addition to the information superimposed on the captured image G1 shown in FIG. 14, an arrow 67 is displayed as information indicating the direction in which the radiation detector 30 exists. Is displayed. Instead of the arrow 67, characters such as up, down, left, and right may be used as information indicating the direction in which the radiation detector 30 exists.

  The operators of the radiation irradiation device 10 and the radiation detector 30 perform pre-imaging operations in cooperation with each other. That is, the operator of the radiation detector 30 moves the radiation detector 30 to an appropriate position behind the subject H, and the operator of the radiation irradiation apparatus 10 It is confirmed whether the radiation detector 30 has moved to the position. If necessary, the position of the radiation irradiation device 10 is moved. With this operation, the center position 66 of the irradiation field region 65 and the center position 64 of the detection region 63 can be matched as shown in FIG.

  Further, the control unit 59 determines whether the center position of the radiation detector 30 matches the center position 66 of the irradiation field area 65, and when they match, information indicating the match is given to the radiation irradiation apparatus 10. May be transmitted. Upon receiving the information indicating the coincidence, the radiation irradiating apparatus 10 notifies the monitor 15 of the coincidence of the center positions, for example, a text "center position coincided" or a mark indicating that the center positions coincided. indicate. In FIG. 17, the coincidence of the center positions is indicated by a star mark 68. Note that, instead of displaying on the monitor 15, it is possible to notify the operator that the center position of the radiation detector 30 coincides with the center position 66 of the irradiation field area 65, for example, by outputting sound or blinking the monitor 15. If possible, any method may be used.

  When the center position of the radiation detector 30 and the center position 66 of the irradiation field area 65 match, the radiation irradiating device 10 is used based on the tilt information of the radiation detector 30 included in the movement information of the radiation detector 30. May be displayed in a manner superimposed on the captured image G1. Here, the inclination of the radiation detector 30 with respect to the radiation irradiation apparatus 10 is a two-dimensional inclination with reference to a plane perpendicular to the radiation irradiation axis. When the x-axis and the y-axis are set on the plane of the radiation detector 30, the inclination is an inclination angle around each of the x-axis and the y-axis. In the control unit 59 of the console 50, when the center position of the radiation detector 30 coincides with the radiation irradiation axis, information on the inclination of the radiation detector 30 is acquired and transmitted to the radiation irradiation device 10. When the radiation irradiation device 10 receives the information on the inclination of the radiation detector 30, the radiation irradiation device 10 displays the angles around the x-axis and the y-axis on the monitor 15. FIG. 17 shows angle information 69 indicating angles around the x-axis and the y-axis. Accordingly, the operator adjusts the inclination of the radiation detector 30 to set the angles around the x-axis and the y-axis of the radiation detector 30 to 0, so that the radiation irradiation axis and the radiation detector 30 intersect perpendicularly. be able to.

  The control unit 59 calculates the relative inclination between the radiation irradiation device 10 and the radiation detector 30 using the movement information of the radiation irradiation device 10 and transmits the calculated relative inclination to the radiation irradiation device 10. You may make it. In this case, after the radiation detector 30 is fixed, by adjusting the inclination of the radiation irradiation device 10, the relative inclination of the radiation detector 30 with respect to the radiation irradiation device 10 can be adjusted. When the radiation irradiation axis is perpendicular to the radiation detector 30, the color of the detection area 63 superimposed on the captured image G1 may be changed or the detection area 63 may be blinked. Thereby, the operator can easily recognize that the radiation irradiation axis and the radiation detector 30 have become perpendicular.

  Here, in the state shown in FIG. 17, since the irradiation field region 65 is larger than the detection region 63, of the radiation transmitted through the subject H, the radiation not irradiated to the radiation detector 30 can be imaged. It can't be done and is useless. Irradiating the subject H with such useless radiation increases the exposure amount of the subject H.

  For this reason, the operator of the radiation irradiation apparatus 10 gives an instruction to make the irradiation field area 65 coincide with the detection area 63 using the input unit 24. For this reason, the drive control unit 23 of the radiation irradiation apparatus 10 determines whether or not there has been an area matching instruction (step ST15). Note that the region matching instruction is an instruction for the operator to operate the irradiation field region 65 displayed on the monitor 15 with a finger or the like to match the irradiation field region 65 with the detection region 63 as shown in FIG.

  If step ST15 is denied, the process returns to step ST10. Accordingly, the captured image G1 is continuously transmitted to the console 50, and the console 50 acquires radiation detector position information. When the movement of the radiation detector 30 is continued, any one of the markers 34A to 34D is determined in the captured image G1, that is, after it is determined that the radiation detector 30 is not included, any of the markers 34A to 34D is again included in the captured image G1. That is, it may be determined that the radiation detector 30 is included. In this case, step ST11 is affirmed, and the radiation detector position information is obtained based on any of the markers 34A to 34D of the radiation detector 30 included in the captured image G1.

  Here, the collimator 14 may be driven by the collimator control unit 21 in conjunction with the region matching instruction. However, when the collimator 14 is driven each time there is an instruction to match the irradiation field region 65 and the detection region 63, The power consumption increases. For this reason, in the present embodiment, when the instruction to match the irradiation field area 65 with the detection area 63 using the input unit 24 ends, and the input unit 24 receives an input indicating that the imaging preparation is completed. Alternatively, the collimator 14 may be driven by the collimator control unit 21.

  Further, when step ST15 is affirmed, the drive control unit 23 of the radiation irradiation device 10 determines whether or not the imaging preparation has been completed (step ST16). The completion of the imaging preparation may be received by the input from the input unit 24 as described above. If step ST16 is denied, the process returns to step ST10.

  When step ST16 is affirmed, the drive control unit 23 turns on the irradiation field lamp 29, drives the collimator 14 by the collimator control unit 21, and sets the irradiation field (step ST17). At this time, it is preferable to notify the operator that the collimator 14 is being driven by blinking the irradiation field area 65 displayed on the monitor 15 or the like. Note that the drive control unit 23 of the radiation irradiation apparatus 10 does not accept the operation of the imaging button 18 while the collimator 14 is being driven. Then, when the driving of the collimator 14 is completed, the drive control unit 23 detects the movement of the radiation irradiation device 10 by the motion sensor 28 and calculates the amount of movement of the radiation irradiation device 10 per unit time (step ST18). The amount of movement of the radiation irradiating apparatus 10 per unit time corresponds to camera shake of the operator. The drive control unit 23 determines whether or not the amount of movement per unit time is less than the threshold Th1 (step ST19). If step ST19 is denied, the drive control unit 23 displays a warning on the monitor 15 (step ST20), and returns to step ST18. The operator can take measures such as firmly holding the radiation irradiation device 10 by the warning display.

  When step ST19 is denied, the drive control unit 23 controls the radiation source 19 so as not to emit radiation even when the photographing button 18 is operated. Alternatively, the photographing button 18 may be locked so that the photographing button 18 cannot be operated. Further, the threshold value Th1 may be changed according to the irradiation time of the radiation included in the imaging condition. For example, when the irradiation time of radiation is long, the influence of camera shake becomes large. Therefore, the threshold value Th1 may be changed so that the longer the irradiation time of radiation is, the shorter the threshold value Th1 becomes.

  When step ST19 is affirmed, the drive control unit 23 determines whether or not a photographing instruction has been given from the input unit 24 (step ST21). If step ST21 is denied, the process returns to step ST18. When step ST21 is affirmed, the drive control unit 23 irradiates the subject H with the radiation by driving the radiation source 19 to emit the radiation toward the subject H (step ST22). When step ST19 is affirmed, the drive control unit 23 may display on the monitor 15 that the image can be captured. If step ST19 is affirmed after being denied, the drive control unit 23 stops displaying the warning on the monitor 15 and enables the radiation source 19 to be driven by operating the imaging button 18. If the photographing button 18 cannot be operated, the photographing button 18 is made operable by unlocking the photographing button 18 or the like.

  The radiation detector 30 detects radiation transmitted through the subject H and acquires a radiation image G2 of the subject H (step ST23). The acquired radiation image G2 is transmitted to the console 50, subjected to image processing for improving the image quality in the image processing unit 52, and output to the output unit 54. Further, the control unit 59 transmits the radiation-processed image G2 to the radiation irradiation device 10 (step ST24).

  The drive control unit 23 of the radiation irradiation apparatus 10 displays the radiation image G2 on the monitor 15 (Step ST25), and ends the processing. In this case, the captured image G1 and the radiation image G2 may be superimposed on the monitor 15 or only the radiation image G2 may be displayed. Thereby, it can be determined whether or not the radiation image G2 has been appropriately acquired.

  As described above, in the present embodiment, one of the markers 34A to 34D of the radiation detector 30 is detected from the captured image G1, and if any of the markers 34A to 34D is detected, the radiation detection is performed from the markers 34A to 34D. The identification information of the device 30 is obtained. Therefore, the identification information of the radiation detector can be input to the console 50 only by photographing the radiation detector 30 with the camera 13. Therefore, the burden on the operator of inputting the identification information of the radiation detector 30 to the console 50 can be reduced.

  In the above embodiment, each of the plurality of markers is provided near a different corner of the radiation detector 30. However, each of the plurality of markers is provided near a different side of the radiation detector 30. You may. Further, each of the plurality of markers may be provided near different corners and near different sides of the radiation detector 30.

  Further, in the above embodiment, a one-dimensional barcode is used as the markers 34A to 34D, but a two-dimensional barcode may be used.

  In the above embodiment, the control unit 59 of the console 50 performs the process of acquiring the identification information of the radiation detector 30 and the process of identifying the radiation detector 30 based on the identification information. The processing may be performed in the radiation irradiation apparatus 10. In this case, these processes may be performed by the drive control unit 23, and a dedicated means for performing these processes may be provided in the radiation irradiation apparatus 10.

  In the above embodiment, the SID and SOD are detected by the distance sensor 27 and the body thickness of the subject H is calculated from the SID and SOD. May input the body thickness of the subject H. In this case, the measured body thickness of the subject H may be input. However, as shown in FIG. 19, icons 90 such as a lean person, a normal body person, and a fat person are displayed on the monitor 15 and displayed. The operator may select any one of the icons 90 to receive the input of the body thickness.

  In addition, since the radiation irradiating apparatus 10 according to the present embodiment is portable, it is possible to emit radiation in a direction in which the subject H does not exist. In order to prevent such a situation, when the photographed image G1 does not include an object such as the radiation detector 30 necessary for photographing, the drive control unit 23 controls the radiation source 19 so that the radiation cannot be emitted. Is preferred.

  Further, in the above embodiment, the SID and SOD are measured by the distance sensor 27 before the start of the pre-shooting work, but the SID and SOD may be measured by the distance sensor 27 during the pre-shooting work. In this case, a position where the SID and the SOD are measured may be specified on the monitor 15 and information on the position may be transmitted to the console 50. This allows the console 50 to recognize at which position of the subject H the body thickness has been acquired.

  Further, in the above embodiment, the imaging condition is set in the control unit 59 of the console 50, but it is possible to irradiate the radiation according to the set imaging condition based on information on the remaining amount of the battery 26 of the radiation irradiation apparatus 10. It may be determined whether or not there is. If it is not possible to irradiate the radiation under the set imaging conditions, information to that effect may be transmitted to the radiation irradiation apparatus 10. In the radiation irradiating apparatus 10, the operator can recognize that the remaining amount of the battery 26 is insufficient by displaying on the monitor 15 information indicating that imaging is not possible. Therefore, the operator can take measures such as replacing the battery 26 or preparing another radiation irradiation device 10.

  Further, in the above-described embodiment, from the console 50, the captured image G1, the identification information of the radiation detector 30, the radiation detector position information, the information indicating the vertical direction and the center position information, and the information indicating the driving state of the radiation detector 30. Alternatively, battery information and the like may be transmitted to the terminal 80, and the terminal 80 may superimpose and display various types of information on the captured image G1 in the same manner as displayed on the monitor 15. Thereby, the doctor or the like can monitor the status of the pre-imaging work of the subject H on his / her terminal 80.

  In the above embodiment, the top and bottom direction of the radiation detector 30 may be the left and right direction of the captured image G1. Further, the top and bottom of the radiation detector 30 may be opposite to the top and bottom of the captured image G1. In such a case, the acquired radiation image G2 does not match the top and bottom of the captured image G1, and therefore, if the acquired radiation image G2 is displayed as it is, the radiation image G2 becomes difficult to see. In the present embodiment, since the console 50 detects the vertical direction of the radiation detector 30, the radiation image G2 can be rotated so that the displayed radiation image G2 is correctly oriented. In this way, by rotating the radiation image G2 so that the top and bottom are correct, the top and bottom of the captured image G1 and the top of the radiation image G2 can be matched, so that the displayed radiation image G2 can be easily viewed. it can.

  Further, in the above embodiment, the movement of the radiation irradiation apparatus 10 per unit time during the irradiation of the radiation may be equal to or larger than the threshold Th1. In such a case, the radiation emission is temporarily stopped, and when the movement per unit time of the radiation irradiation device 10 becomes less than the threshold Th1, the radiation is further emitted for the remaining radiation irradiation time. Is also good. In this case, two radiation images are acquired before and after the stop of radiation emission. The console 50 may generate the final radiation image G2 by adding and combining the two radiation images.

  In the above embodiment, the irradiation field lamp 29 is turned on when the preparation for imaging is completed. However, the irradiation field lamp 29 may be switched on or off. For example, when acquiring a radiation image G2 of the animal's face, it is necessary to irradiate the animal's face with radiation. In such a case, when the irradiation field lamp 29 is turned on, light is irradiated on the face of the animal, and the animal may be violent. For this reason, the control unit 59 of the console 50 determines the site of the subject H included in the captured image G1, and if the site is an animal face, the irradiation field lamp 29 is also turned on by an instruction to complete the imaging preparation. It may not be turned on. Thus, it is possible to prevent the animals from being surprised and violent by the visible light emitted from the irradiation field lamp 29. Since the operator knows the site of the subject H, the irradiation field lamp 29 may be switched on or off according to an instruction from the input unit 24 by the operator.

  In the above embodiment, the amount of movement of the radiation irradiation apparatus 10 per unit time is calculated using the amount of movement detected by the motion sensor 28. Here, in the present embodiment, the captured image G1 is obtained at a predetermined frame rate. For this reason, the amount of movement of the radiation irradiation apparatus 10 per unit time may be calculated from two photographed images acquired at different photographing timings and a photographing time difference between the two photographed images.

  Further, in the above embodiment, the captured image G1 is displayed so that the region corresponding to the radiation detector can be identified by superimposing the detection region 63 corresponding to the detection region of the radiation detector 30 on the captured image G1. However, by superimposing an area surrounded by the four side surfaces 32C, 32D, 32E, and 32F of the housing 32 of the radiation detector 30 on the captured image G1, the captured image G1 can be identified so that the area corresponding to the radiation detector can be identified. It may be displayed.

  Further, in the above embodiment, the camera 13 may be an infrared camera capable of measuring the temperature distribution of the shooting range using infrared rays, and an infrared image representing the temperature distribution of the shooting range may be used as the shot image G1. In this case, the captured image G1 acquired by the camera 13 represents the temperature distribution on the surface of the subject H and the surface of an object around the surface. By using the camera 13 capable of acquiring such an infrared image as the photographed image G1, even when the subject H is covered with a sheet or the like at a disaster site or the like, the temperature distribution represented by the photographed image G1 enables The position of the subject H can be specified on the captured image G1.

  When using such an infrared camera, the marker is preferably made of a material that reflects infrared light. For example, when the marker is a barcode, the marker may be formed by printing a barcode using a material that reflects infrared light on a material that reflects infrared light. When a light-emitting device such as an LED is used as a marker, a light-emitting device that emits infrared light may be used.

  It is preferable that the camera 13 be a camera that can switch between photographing with visible light and photographing with infrared light. When the camera 13 capable of switching between the imaging with visible light and the imaging with infrared light is used, first, the subject H is imaged with infrared light to obtain a captured image G1 representing a temperature distribution, and a captured image G1 representing a temperature distribution. First, the irradiation field is positioned using G1. After that, the camera 13 is switched to imaging with visible light, and the detector area and the irradiation field area of the radiation detector 30 are superimposed on the captured image G1 as in the above-described embodiment, and the radiation detector 30 is displayed using the captured image G1. What is necessary is just to position the radiation detector 30 so that a detection area and an irradiation field area may correspond. Thereby, even when the subject H is covered with a sheet or the like, the radiation field region and the detection region of the radiation detector 30 can be matched to acquire the radiation image G2.

  By displaying the captured image G1 as an infrared image on the monitor 15 in this manner, it is possible to recognize abnormalities in the body temperature of the subject H such as heat stroke and accidental hypothermia. Further, the radiographic image G2 obtained by radiography and the radiographic image G1 as an infrared image may be displayed side by side on the monitor 15. Thus, the infrared image and the radiation image G2 can be compared. In particular, when a treatment for abnormal body temperature is performed before capturing a radiation image, the progress of the treatment can be continuously confirmed by continuously displaying the infrared image.

  In the above embodiment, the relative positional relationship between the radiation detector 30 and the camera 13 is obtained from at least one of the size and the shape of any of the markers 34A to 34D detected from the captured image G1. It may be. In this case, as shown in FIG. 20, the radiation irradiating apparatus 10 determines the relative position between the radiation detector 30 and the camera 13 based on at least one of the size and shape of any of the markers 34A to 34D detected from the captured image G1. It further includes a positional relationship acquisition unit 42 for acquiring a simple positional relationship. Here, the distance between the radiation detector 30 and the camera 13, that is, the radiation irradiation device 10, and the radiation detector 30 are determined using both the size and the shape of any of the markers 34A to 34D detected from the captured image G1. It is assumed that the inclination of the radiation irradiation axis in the radiation irradiation apparatus 10 with respect to the axis perpendicular to the detection plane 30 is acquired as a positional relationship.

  Here, the size of the markers 34A to 34D included in the captured image G1 increases as the distance between the radiation detector 30 and the camera 13 decreases. For this reason, the positional relationship acquisition unit 42 detects the markers 34A to 34D from the captured image G1, and calculates the relative distance between the radiation detector 30 and the camera 13 from the size of the detected marker. Specifically, the relative distance between the radiation detector 30 and the camera 13 is determined based on the difference between the size of a marker serving as a reference photographed at a predetermined distance and the marker detected from the photographed image G1. Is calculated.

  On the other hand, if the radiation irradiation axis of the radiation irradiation device 10 is inclined with respect to the axis perpendicular to the detection surface of the radiation detector 30, the bars of the markers 34A to 34D included in the captured image G1 are displayed as shown in FIG. The shape of the cord is distorted. For this reason, the positional relationship acquisition unit 42 detects the markers 34A to 34D from the captured image G1 and calculates the inclination of the radiation irradiation axis with respect to the axis perpendicular to the detection surface of the radiation detector 30 from the distortion of the shape of the detected marker. calculate. Specifically, based on the distortion of the shape of the marker detected from the captured image G1 with respect to the reference marker captured in a state where the radiation irradiation axis is perpendicular to the radiation detector 30, The inclination of the radiation irradiation axis with respect to the axis perpendicular to the detection surface is calculated. In this case, it is preferable to enlarge the detected marker.

  The detected positional relationship is displayed on the monitor 15. The operator can change the distance between the radiation detector 30 and the radiation irradiation device 10 by looking at the positional relationship displayed on the monitor 15. Further, the inclination of the radiation irradiation axis with respect to the axis perpendicular to the detection surface of the radiation detector 30 can be adjusted.

  If the distance included in the detected positional relationship is larger than a predetermined threshold, or if the inclination of the two axes is larger than a predetermined threshold, a warning is issued. May be performed. Specifically, the monitor 15 displays a text or the like indicating that the distance included in the positional relationship has become larger than the threshold value or that the inclination of the two axes has become larger than the predetermined threshold value. Should be displayed on the screen.

  Further, in the above embodiment, a marker indicating the back surface may be provided on the back surface 32B of the radiation detector 30. FIG. 22 is an external perspective view of the radiation detector as viewed from the back. As shown in FIG. 22, on the back surface 32B of the housing 32 of the radiation detector 30, markers 43A to 43D different from the markers 34A to 34D are provided near four side surfaces 32C, 32D, 32E, and 32F. I have. The markers 43A to 43D include information indicating that the marker is on the back surface 32B of the radiation detector 30. In FIG. 22, the markers 43A to 43D are one-dimensional barcodes. However, if it is known that the back surface 32B is used, the markers 43A to 43D are symbols, simple line segments, colors, or the like not included in the front surface 32A. Is also good. Further, a light emitting element indicating the back surface 32B may be used. When a light emitting element is used, the arrangement of the light emitting element may be different between the front surface 32A and the rear surface 32B, and the color of light emission may be different between the front surface 32A and the rear surface 32B.

  When a marker is detected from the captured image G1 and the detected marker is any of the markers 43A to 43D, the radiation detector 30 may be arranged with the back surface 32B facing the radiation irradiation device 10. You will understand. Therefore, by displaying the fact on the monitor 15, the operator can recognize that the orientation of the radiation detector 30 is different, so that the front surface 32 </ b> A of the radiation detector 30 faces the radiation irradiation device 10. The radiation detector 30 can be installed again.

  In the above embodiment, when a light emitting element is used as a marker, the detector information of the radiation detector 30 may be represented by at least one of a lighting pattern, a blinking pattern, and a color of emitted light of the light emitting element. . Here, as described above, the detector information includes the information indicating the driving state of the radiation detector 30, the information indicating the remaining amount of the battery of the radiation detector 30, the motion information detected by the motion sensor 38, and the like. In the radiation irradiation apparatus 10, various controls can be performed in accordance with at least one of a lighting pattern, a blinking pattern, and a color of emitted light of a light emitting element detected from the captured image G1.

  For example, when the color of the light emitting element indicates the driving state of the radiation detector 30, the driving state of the radiation detector 30 can be identified by detecting the color of the light emitting element included in the captured image G1. Here, when the driving state of the radiation detector 30 is “power on”, an instruction to change the driving state of the radiation detector 30 is given according to the operation state of the radiation irradiation apparatus 10. From the radiation detector 30. For example, in a case where the driving state of the radiation detector 30 is “power on”, and when the step ST19 shown in FIG. 12 is affirmed, the driving state of the radiation detector 30 is changed to “ready for radiation image detection. An instruction to change to the “ready state” which is a completed state can be issued from the radiation irradiation apparatus 10 to the radiation detector 30. Thus, the driving state of the radiation detector 30 can be changed to a ready state in which imaging can be performed immediately.

  Further, in the above embodiment, the portable radiation irradiating device 10 is used. However, it is possible to prevent camera shake during exposure and exposure to the hand of the operator, and to perform complicated operations such as an emergency room and an intensive care unit. It is also possible to use a radiation irradiating device that can travel and is intended to be moved at a place. FIG. 23 is a perspective view showing the overall shape of the radiation irradiating device that can travel, and FIG. 24 is a diagram showing a state when the radiation irradiating device that is capable of traveling is used. The movable radiation irradiation apparatus 100 includes a leg 110 capable of traveling on the apparatus mounting surface, a main body 120 held on the leg 110, and an arm connected to the main body 120. 130, and a radiation source 140 attached to the distal end of the arm 130.

  The leg portion 110 has four legs 111 and a wheel portion 112 attached to the lower surface of the distal end of each leg 111. The wheel unit 112 is provided with a brake unit (not shown).

  The main body unit 120 includes an irradiation control unit 20, a collimator control unit 21, an imaging control unit 22, a drive control unit 23 similar to the radiation irradiation device 10 in the above-described embodiment, in a housing 122 fixed on the base 121. The communication unit 25 and the battery 26 are housed. A handle 123 for pushing and pulling the radiation irradiation apparatus 100 is attached to an upper end of the housing 122. An operation unit 125 is attached to an upper portion of the base 121.

  The operation unit 125 includes an input unit 126 such as an operation button or a switch for inputting a signal or the like for instructing various operations of the radiation irradiation apparatus 100, a monitor 127 for displaying various information, and the like. Note that, similarly to the radiation irradiation apparatus 10 described in the above embodiment, the input unit 126 may be configured by a touch panel.

  The arm unit 130 includes a plurality of members 131, 132, and 133 having a nested structure. The member 132 and the member 133 are connected by a rotation holding mechanism 134, and the member 133 is configured to rotate in a direction in which the angle changes with respect to the member 132.

  The radiation source 140 is swingably attached to the tip of the member 133 of the arm 130. The radiation source 140 accommodates the same camera 13, collimator 14, radiation source 19, distance sensor 27, motion sensor 28, and irradiation field lamp 29 as the radiation irradiation device 10 in the above embodiment. The swingable position of the swingable source unit 140 can be fixed by operating the lock lever 141.

  In the radiation irradiating apparatus 100 capable of traveling as described above, the captured image G1 of the subject acquired by the camera 13 is displayed on the monitor 127 of the operation unit 125.

  When performing a pre-imaging operation, the operator extends the arm unit 130 and sets the length of the arm unit 130 and the radiation source unit 140 so that the radiation source unit 140 is located directly above the subject H above the subject H. Set the swing position of By photographing the subject H by the camera 13 in this state, similarly to the above embodiment, based on the markers 34A to 34D of the radiation detectors 30 included in the photographed image G1, the radiation detectors 30 in the photographed image G1 are displayed. The position can be specified.

  In addition, when the radiation irradiating apparatus 100 that is capable of traveling is used, the arm unit 130 expands and contracts, the radiation source unit 140 swings, and the detection area superimposed on the radiation image G2 coincides with the irradiation field area. The driving of the collimator 14 may be controlled.

  Hereinafter, the operation and effect of the embodiment of the present invention will be described.

  A surface of the radiation detector, wherein the surface including the detection region has a rectangular shape, and each of the plurality of markers is attached to at least one of a vicinity of a different side and a vicinity of a different corner of the surface including the detection region. By doing so, it is possible to reduce the possibility that all of the plurality of markers are hidden by the subject. Therefore, it is possible to increase the possibility that the marker is included in the captured image, and as a result, it is possible to reliably obtain the identification information.

  By identifying the radiation detector based on the identification information, it is possible to prevent the radiation detector to be used from being mixed up.

REFERENCE SIGNS LIST 1 radiation image capturing device 10 radiation irradiating device 13 camera 14 collimator 15 monitor 16, 17 gripping unit 19 radiation source 20 irradiation control unit 21 collimator control unit 22 imaging control unit 23 drive control unit 24 input unit 25 communication unit 26 battery 27 distance sensor 28 Motion Sensor 29 Irradiation Field Lamp 30 Radiation Detector 31 Image Detector 32 Housing 34A to 34D, 40A to 40D Marker 35 Imaging Control Unit 36 Drive Control Unit 37 Communication Unit 38 Motion Sensor 39 Battery 42 Positional Relationship Acquisition Unit 50 Console 51 Radiation imaging data processing unit 52 Image processing unit 54 Output unit 55 Storage unit 56 Input unit 57 Communication unit 58 Monitor 59 Control unit

Claims (13)

A radiation source for irradiating the subject with radiation;
Imaging means for imaging the subject to obtain a captured image of the subject,
A radiation detector for detecting the radiation transmitted through the subject and generating a radiation image of the subject, wherein a marker representing identification information for identifying the radiation detector is provided on a detection surface side of the radiation. Radiation detector,
A first control unit that detects the marker of the radiation detector from the captured image and, when the marker is detected, recognizes a vertical direction on the detection surface of the radiation detector from the marker;
A second control unit configured to superimpose and display information indicating the vertical direction on the captured image.   2. The radiation image capturing apparatus according to claim 1, wherein another marker indicating that the surface is opposite to the detection surface is attached to a surface of the radiation detector opposite to the radiation detection surface. 3. . 3. The radiation image capturing apparatus according to claim 1, wherein the radiation source and the image capturing unit are provided integrally. The markers, a radiographic imaging apparatus of any one of claims 1 to 3 comprising granted to portions other than the detection region for detecting the radiation in the detection surface. A surface including the detection area for detecting the radiation in the radiation detector has a rectangular shape, and each of the plurality of markers is provided to at least one of a vicinity of a different side and a vicinity of a different corner of the surface including the detection area. The radiographic image capturing apparatus according to any one of claims 1 to 4 , comprising: The marker is, the radiographic imaging apparatus according to any one of claims 1 consisting of a bar code 5. The marker is, the radiographic imaging apparatus of any one of claims 1 to 6 are those having a different color information for each type of the radiation detector. Made from the marker light emitting device, one light emitting device emits light color, claim 1 is to identify the radiation detector by at least one of the light of the lighting pattern and the light flashing pattern 5 The radiation image capturing apparatus according to claim 1. The radiation image capturing apparatus according to claim 8 , wherein the light emitting device further represents the detector information of the radiation detector by at least one of a color of emitted light, a lighting pattern of the light, and a blinking pattern of the light. . When the marker is detected, a positional relationship acquisition unit configured to acquire a relative positional relationship between the radiation detector and the imaging unit based on at least one of a size and a shape of the marker in the captured image. radiographic imaging apparatus according to any one of claims 1 comprising 9.   When the top and bottom directions of the radiation detector on the detection surface are different from the top and bottom of the captured image, the apparatus further includes a third control unit that rotates and displays the radiation image so that the top and bottom of the radiation image are correct. The radiographic image capturing apparatus according to claim 1. A radiation source for irradiating the subject with radiation;
Imaging means for imaging the subject to obtain a captured image of the subject,
A radiation detector for detecting the radiation transmitted through the subject and generating a radiation image of the subject, wherein a marker representing identification information for identifying the radiation detector is provided on a detection surface side of the radiation. A method of controlling a radiation image capturing apparatus including a radiation detector comprising:
Detecting the marker of the radiation detector from the captured image,
When the marker is detected, recognizes a vertical direction on the detection surface of the radiation detector from the marker,
A method for controlling a radiographic image capturing apparatus, comprising superimposing and displaying information indicating the vertical direction on the captured image. A radiation source for irradiating the subject with radiation;
Imaging means for imaging the subject to obtain a captured image of the subject,
A radiation detector for detecting the radiation transmitted through the subject and generating a radiation image of the subject, wherein a marker representing identification information for identifying the radiation detector is provided on a detection surface side of the radiation. A program for causing a computer to execute a method for controlling a radiation image capturing apparatus including a radiation detector, comprising:
Detecting the marker of the radiation detector from the captured image,
When the marker is detected, recognizing a vertical direction on the detection surface of the radiation detector from the marker;
Superimposing and displaying the information indicating the up-down direction on the photographed image.