JP5085204B2 - Radioscopy apparatus and control method of radioscopy apparatus - Google Patents

Description

  The present invention relates to a radiographic imaging apparatus capable of changing a fluoroscopy / imaging position and a method for controlling the radiographic imaging apparatus.

  Some radiographic imaging apparatuses such as an X-ray fluoroscopic imaging apparatus are configured to be able to change a position at which fluoroscopy or imaging is performed. An operator who operates this type of X-ray fluoroscopic imaging apparatus generally moves an X-ray irradiation system including a top plate on which a subject is placed or an X-ray tube and an X-ray detector while checking a fluoroscopic image. Thus, fluoroscopy and photographing are performed at a desired position.

  At this time, the operator needs to appropriately and complicatedly operate the operation unit such as a push button switch or a joystick corresponding to each moving operation provided on the operation panel while confirming the fluoroscopic image. In addition, since the top plate on which the subject is placed and the X-ray irradiation system are heavy, it cannot be said that the followability of these movements with respect to the operation of the operation unit is sufficient. Therefore, it can be said that for the operator, the operation of adjusting the position for fluoroscopy and photographing to a desired position is a difficult operation that requires a relatively long time.

  Conventionally, there is a technique disclosed in Japanese Patent Laid-Open No. 2003-114201 (Patent Document 1) as a technique for easily moving this type of top plate or radiation irradiation system to a desired position.

The X-ray fluoroscopic apparatus disclosed in Japanese Patent Laid-Open No. 2003-114201 (Patent Document 1) includes a display unit that displays an X-ray fluoroscopic image of a subject, and an X-ray is displayed on the display screen of the display unit. Set an operation unit display area to display the control unit for driving the top panel and the X-ray irradiation system, close to or superimposed on the fluoroscopic image display area, and operate each operation unit in the operation unit display area with a pointing device By doing so, the top plate and the X-ray irradiation system are driven. For this reason, the operator can operate the operation unit and the X-ray fluoroscopic image in the same visual field, and can easily move the top plate and the X-ray irradiation system to desired positions.
JP 2003-114201 A

  Although the conventional technique of easily moving the top board or the radiation irradiation system to a desired position can improve the operability, it cannot eliminate the time required for fine adjustment of the fluoroscopic position and the imaging position. This fluoroscopic / imaging position adjustment is performed under radioscopy. For this reason, when applying a technique for easily moving a conventional top plate or radiation irradiation system to a desired position, the subject is always exposed even while the fluoroscopic / imaging position is adjusted.

  The present invention has been made in consideration of the above-described circumstances, and a radiographic imaging apparatus and radiographic imaging apparatus that can easily change the fluoroscopic / imaging position to a desired position without irradiating the subject with radiation. It is an object to provide a control method.

In order to solve the above-described problems, a radiographic imaging apparatus according to the present invention includes a bed for supporting a subject, radiation generating means for irradiating the subject with radiation, and the radiation generating means disposed opposite to the subject. Radioscopy comprising radiation detection means for detecting radiation that has passed through the specimen, image generation means for generating a fluoroscopic image and a captured image based on the detected radiation, and display means for displaying the generated image A photographing apparatus comprising: reference image storage means for storing at least one frame of the fluoroscopic images or at least one of the photographed images as a reference image; and the reference image after the radiation irradiation is stopped. Display control means to be displayed on the display means, and an initial relative position that is a relative position between the bed and the radiation detection means at the time of generation of the reference image After the initial relative position storage means for storing the location, the display position of the display means on the displayed the reference image is changed based on the input operation of the operator, in accordance with a change in the display position, the bed And a relative position changing means for changing a relative position between the radiation detecting means and the radiation detecting means from the initial relative position.

On the other hand , in order to solve the above-described problems, a control method for a radiographic imaging apparatus according to the present invention includes a bed that supports a subject, radiation generation means for irradiating the subject with radiation, and the radiation generation means. Radiation detecting means for detecting radiation that has been opposed and transmitted through the subject; image generating means for generating a fluoroscopic image and a captured image based on the detected radiation; and display means for displaying the generated image; A method for controlling a radiographic imaging apparatus comprising: a step of storing at least one frame of the fluoroscopic images or at least one of the radiographic images as a reference image; and after radiation irradiation has stopped Displaying the reference image on the display means; and a relative position between the bed and the radiation detection means when the reference image is generated Storing a certain initial relative position, after the display position of the displayed the reference image is changed on the display means, based on the input operation of the operator, in accordance with a change in the display position, and the bed And changing the relative position with respect to the radiation detecting means from the initial relative position.

  According to the radiographic imaging apparatus and the method for controlling the radiographic imaging apparatus according to the present invention, the fluoroscopic / imaging position can be easily changed to a desired position without irradiating the subject with radiation.

  Embodiments of a radiographic imaging apparatus and a method for controlling the radiographic imaging apparatus according to the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a schematic overall configuration diagram showing an embodiment of a radiographic imaging apparatus according to the present invention.

  In the following description, an X-ray fluoroscopic apparatus capable of changing the fluoroscopic / imaging position is shown as an example of the radiographic imaging apparatus 10.

  As shown in FIG. 1, a radiographic imaging apparatus 10 includes a bed 11 that supports a subject P, an X-ray tube 12 as radiation generating means, and X-ray detection as radiation detecting means that detects radiation that has passed through the subject. 13, arm 14 that supports X-ray tube 12 and X-ray detector 13, relative position detector 15 that detects the relative position between bed 11 and X-ray detector 13, CPU 21, RAM 22, ROM 23, network connection 24 , An input unit 25, a display unit 26, a storage unit group 27, an X-ray / drive mechanism control unit 30, and the like.

  The X-ray tube 12 and the X-ray detector 13 are opposed to each other with the subject P supported by the bed 11 interposed therebetween. X-rays generated in the X-ray tube 12 pass through the subject P and are irradiated to the X-ray detector 13. As shown in FIG. 1, the X-ray tube 12 and the X-ray detector 13 are respectively held at both ends of a substantially semicircular arc-shaped arm 14 so as to always face each other.

  The X-ray detector 13 is provided to detect X-rays that have passed through the subject. As the X-ray detector 13, for example, an X-ray flat panel detector that directly converts detected X-rays into electric signals can be used. Of course, an image intensifier and a TV camera may be used in combination. The X-ray detector 13 gives an electrical signal corresponding to the detected X-ray to the CPU 21. The CPU 21 can generate a fluoroscopic image and a captured image based on the X-rays detected by the X-ray detector 13 by using this signal.

  The relative position detector 15 detects the relative position between the bed 11 and the X-ray detector 13. The relative position detection unit 15 has a function of performing output in accordance with the relative position of the X-ray detector 13 based on the position of the bed 11 or the position of the bed 11 based on the position of the X-ray detector 13. Use things. As the relative position detection unit 15, for example, a position detection sensor such as a potentiometer, a rotary encoder, or an ultrasonic distance sensor can be used.

  In the present embodiment, the relative positions of the bed 11 and the X-ray detector 13 on a coordinate plane parallel to the placement surface of the subject P of the bed 11 will be described.

  The relative positional relationship between the bed 11 and the X-ray detector 13 on a coordinate plane parallel to the placement surface of the subject P of the bed 11 changes when at least one of the bed 11 and the X-ray detector 13 moves. In the present embodiment, the bed 11 supports the subject P so as to be movable in the body axis direction of the subject P and in a direction orthogonal to the body axis direction, and the bed 11 places the subject P on the bed 11. An example in which the relative positional relationship between the bed 11 and the X-ray detector 13 on the coordinate plane parallel to the placement surface of the subject P of the bed 11 changes by moving in a coordinate plane parallel to the surface will be described. To do.

  The X-ray detector 13 is configured to be movable in parallel with the subject P placement surface of the bed 11, and the relative position between the bed 11 and the X-ray detector 13 is changed by moving the X-ray detector 13. Note that the relative position may be changed by moving both the bed 11 and the X-ray detector 13.

  The CPU 21 controls the processing operation of the radiographic imaging apparatus 10 according to a program stored in the ROM 23. The CPU 21 loads the relative position / display position change program stored in the ROM 23 and data necessary for executing the program into the RAM 22 without irradiating the subject with radiation according to the relative position / display position change program. A process of easily changing the fluoroscopic / photographing position to a desired position is executed.

  The CPU 21 executes at least an image generation unit, a display control unit, a relative position acquisition unit, a relative position change determination unit, a relative position change amount calculation unit, a displacement conversion unit, a display position change unit, a movement instruction by a relative position / display position change program. It functions as a determination unit, a display position change amount calculation unit, and a relative position change unit. Each unit uses a required work area of the RAM 22 as a temporary storage location for data. In addition, you may comprise this function implementation part by hardware logics, such as a circuit, without using CPU21.

  The RAM 22 provides a work area for temporarily storing programs executed by the CPU 21 and data.

  The ROM 23 stores a startup program for the fluoroscopic imaging apparatus 10, a relative position / display position change program, and various data necessary for executing these programs.

  The ROM 23 has a configuration including a recording medium readable by the CPU 21 such as a magnetic or optical recording medium or a semiconductor memory, and a part or all of the programs and data in the ROM 23 are transmitted via an electronic network. It may be configured to be downloaded.

  The network connection unit 24 implements various information communication protocols according to the network form. The network connection unit 24 connects the radiographic imaging apparatus 10 and other electrical devices according to these various protocols. For this connection, an electrical connection via an electronic network can be applied. Here, the electronic network means an entire information communication network using telecommunications technology. In addition to a LAN (Local Area Network) and the Internet network, a telephone communication line network, an optical fiber communication network, a cable communication network, and a satellite communication network. Etc.

  The input unit 25 includes an operation panel 25a, a drive mechanism operation unit 25b, and a display image operation unit 25c.

  The operation panel 25a includes a hard key such as a button for giving a unique instruction signal to the CPU 21 when the operator presses it, and a display input device.

  The display input device includes an LCD as a display device and a touch panel provided in the vicinity of the LCD. The LCD is controlled by the CPU 21 to display information for operating the radiographic imaging apparatus 10 and a plurality of keys (hereinafter referred to as soft keys) for operating the radiographic imaging apparatus 10. The touch panel gives the CPU 21 information on the position indicated by the operator on the touch panel.

  For example, when the operator intends to press one of the soft keys on the screen displayed on the LCD, the operator tries to touch this soft key equivalent part on the screen. The touch panel obtains information obtained from this contact operation, for example, information on a position where infrared rays are blocked in the case of an infrared light shielding type optical touch panel, as information on the position indicated by the operator, and provides the CPU 21 with the information.

  The drive mechanism operation unit 25b is configured by a general input device such as a keyboard, a touch panel, hard keys, and a joystick, and outputs an operation input signal corresponding to the operation of the operator to the CPU 21. The operator can give an instruction to move the bed 11 or the arm 14 in a desired direction and distance via the drive mechanism operation unit 25b.

  The display image operation unit 25c is configured by general input devices such as a keyboard, a touch panel, hard keys, and a pointing device, for example, and outputs an operation input signal corresponding to the operation of the operator to the CPU 21. The operator can give an instruction to move the display image displayed on the display unit 26 on the display unit 26 in a desired direction and distance via the display image operation unit 25c.

  In addition, what is necessary is just to install each part 25a-25c which comprises the input part 25 in the position which an operator can operate easily. For example, the operation panel 25 a is installed on the bed 11. When the operation panel 25a is installed at two or more places, the functions are distributed according to the installation places, and only one place may be the operation panel 25a, and the other places may be only the hard keys. Further, the hard key or the display input device of the operation panel 25a may be used as the drive mechanism operation unit 25b and the display image operation unit 25c.

  The display unit 26 is configured by a general display output device such as a liquid crystal display or a CRT display, for example, and displays various types of information including a fluoroscopic image and a captured image generated by the image generation unit under the control of the CPU 21.

  The storage unit group 27 includes a reference image storage unit 27a, an initial relative position storage unit 27b, and an initial display position storage unit 27c.

  For the fluoroscopy performed until immediately before the X-ray irradiation is stopped (or completed), the reference image storage unit 27a includes at least one frame (hereinafter referred to as LIH (Last) Image Hold)) is stored as a reference image. Further, when there is a captured image generated by the image generation unit before the X-ray irradiation is stopped, the captured image is stored as a reference image.

  The initial relative position storage unit 27b stores a relative position between the bed 11 and the radiation detection unit (hereinafter referred to as an initial relative position) at the time when the reference image is generated by the image generation unit.

  The initial display position storage unit 27c stores the display position of the reference image on the display unit 26 (hereinafter referred to as the initial display position) when the reference image is first displayed on the display unit 26.

  The X-ray / drive mechanism control unit 30 controls the X-ray tube 12 via the X-ray generation control unit 31 according to the control of the CPU 21 and performs X-ray output control. Further, the X-ray / drive mechanism control unit 30 performs movement control of the bed 11 and the arm 14 via the bed driving mechanism 32 and the irradiation system driving mechanism 33 according to the control of the CPU 21.

  Next, an example of operation | movement of the radiographic imaging apparatus 10 which concerns on this embodiment is demonstrated.

  In fluoroscopy, generally, an image is acquired with an X-ray irradiation intensity weaker than that in imaging. For this reason, although a fluoroscopic image is an image with low resolution, since the dose to which the subject P is exposed is small, a plurality of images (frames) can be acquired continuously while moving the bed 11. For this reason, the operator can move the bed 11 to a desired photographing position while confirming the fluoroscopic image displayed on the display unit 26. Then, after moving the bed 11, the operator images a desired part of the subject P at a desired imaging position in order to obtain a clear image.

  However, the bed 11 may be difficult to respond to the movement of the bed 11 in response to the operator's operation of the drive mechanism operation unit 25b. In this case, it takes time to finely adjust the position.

  Therefore, the radiographic imaging apparatus 10 according to the present invention first performs rough positioning of the bed 11 while seeing through, then stops X-ray irradiation, and refers to a fluoroscopic image (LIH) immediately before the X-ray irradiation is stopped. The image is stored in the reference image storage unit 27a as an image. In addition, when imaging is performed before the X-ray irradiation is stopped at the position where the rough positioning is performed, the captured image is stored as a reference image in the reference image storage unit 27a.

  Then, the reference image is displayed on the display unit 26, and the subject P is irradiated with radiation by interlocking the change in the relative position between the bed 11 and the X-ray detector 13 and the change in the display position of the reference image. Without changing the fluoroscopic / photographing position to a desired position.

  As a method of interlocking the change in the relative position between the bed 11 and the X-ray detector 13 and the change in the display position of the reference image, first, in accordance with the change in the relative position between the bed 11 and the X-ray detector 13, the reference image An example in the case where the display position is changed will be described.

  2, the CPU 21 of the radiographic imaging apparatus 10 shown in FIG. 1 changes the display position of the reference image in accordance with the change in the relative position of the bed 11 and the X-ray detector 13, thereby irradiating the subject P with radiation. It is a flowchart which shows the procedure at the time of changing easily a fluoroscopy / imaging | photography position to an operator's desired position, without irradiating. In FIG. 2, a symbol with a number added to S indicates each step of the flowchart.

  This procedure starts when X-ray irradiation is stopped, the display control unit reads the reference image from the reference image storage unit 27a, and displays the reference image on the display unit 26.

  The reference image storage unit 27a stores the reference image, the initial relative position storage unit 27b stores the initial relative position, and the initial display position storage unit 27c stores the initial display position in advance.

  First, in step S <b> 1, the relative position acquisition unit acquires the current relative position of the bed 11 and the X-ray detector 13 from the relative position detection unit 15 (hereinafter referred to as the current relative position).

  Next, in step S2, the relative position change determination unit determines whether or not the current relative position has changed from the initial relative position stored in the initial relative position storage unit 27b. If it has changed from the initial relative position, the process proceeds to step S3. On the other hand, if it has not changed, the process returns to step S1 and continues to monitor the current relative position.

  Next, in step S3, the relative position change amount calculation unit calculates a change direction and a change amount of the current relative position from the initial relative position.

  Next, in step S4, the displacement conversion unit calculates the moving direction and moving amount of the reference image on the display unit 26 according to the change in relative position according to the resolution of the display unit 26 and the display magnification of the reference image. To do.

  FIG. 3 is an explanatory diagram illustrating an example of moving the reference image on the display unit 26 in accordance with a change in the relative position.

  In step S5, the display position changing unit reads the initial display position from the initial display position storage unit 27c and, as shown in FIG. 3, based on the information on the direction and amount in which the reference image received from the displacement conversion unit should be moved. Then, the display position of the reference image on the display unit 26 is changed from the initial display position. The reference image in which the display position is changed (see the lower part of FIG. 3) is an image that will be obtained when performing fluoroscopy and photographing at the current relative position.

  The fluoroscopic / imaging position can be easily operated without irradiating the subject P with radiation by changing the display position of the reference image according to the change in the relative position between the bed 11 and the X-ray detector 13 by the above procedure. The position can be changed to a desired position.

  Subsequently, as another method for linking the change in the relative position between the bed 11 and the X-ray detector 13 and the change in the display position of the reference image, the bed 11 and the X-ray are changed according to the change in the display position of the reference image. An example of changing the relative position of the detector 13 will be described.

  In FIG. 4, the CPU 21 of the radiographic imaging apparatus 10 shown in FIG. 1 changes the relative position between the bed 11 and the X-ray detector 13 according to the change in the display position of the reference image. It is a flowchart which shows the procedure at the time of changing easily a fluoroscopy / imaging | photography position to an operator's desired position, without irradiating. In FIG. 4, reference numerals with numbers added to S indicate steps in the flowchart.

  Also in this procedure, the X-ray irradiation is stopped, and the display control unit reads the reference image from the reference image storage unit 27a and displays the reference image on the display unit 26 to start.

  The reference image storage unit 27a stores the reference image, the initial relative position storage unit 27b stores the initial relative position, and the initial display position storage unit 27c stores the initial display position in advance.

  First, in step S21, the display position changing unit receives an instruction from the operator via the display image operating unit 25c, and changes the display position of the reference image on the display unit 26.

  Next, in step S22, the movement instruction determination unit is set according to the position of the currently displayed reference image (hereinafter referred to as the current display position) by the operator via the display image operation unit 25c and the operation panel 25a. 11 and whether or not an instruction to change the relative position of the X-ray detector 13 has been received. When the operator determines that the current display position is a desired imaging position, the operator gives an instruction to the radiographic imaging apparatus 10 to change the relative position between the bed 11 and the X-ray detector 13.

  If an instruction to change the relative position of the bed 11 and the X-ray detector 13 is received, the process proceeds to step S23. If there is no instruction to change the relative positions of the bed 11 and the X-ray detector 13, the process returns to step S21 to accept the movement of the reference image by the operator.

  Next, in step S23, the display position change amount calculation unit reads the initial display position from the initial display position storage unit 27c, and calculates the change direction and change amount of the current display position from the initial display position.

  Next, in step S <b> 24, the displacement conversion unit calculates the movement direction and movement amount of the bed 11 according to the change in the display position according to the resolution of the display unit 26, the display magnification of the reference image, and the like.

  Next, in step S25, the relative position changing unit reads the initial relative position from the initial relative position storage unit 27b, and sets the bed 11 based on the information on the direction and amount to move the bed 11 received from the displacement conversion unit. The relative position between the bed 11 and the X-ray detector 13 is changed from the initial relative position.

  By the above procedure, the fluoroscopic / imaging position can be easily operated without irradiating the subject P with radiation by changing the relative position of the bed 11 and the X-ray detector 13 in accordance with the change in the display position of the reference image. The position can be changed to a desired position.

  The radiographic imaging apparatus 10 according to the present embodiment performs rough positioning of the bed 11 while seeing through, and then stores the fluoroscopic image (LIH) immediately before the X-ray irradiation stop as a reference image in the reference image storage unit 27a. Alternatively, the captured image is stored as a reference image. For this reason, the reference image can be displayed even after the X-ray irradiation is stopped, and the display position of the reference image can be changed according to the change in the relative position between the bed 11 and the X-ray detector 13. Therefore, even after the X-ray irradiation is stopped, it is possible to easily confirm an image expected to be obtained by photographing only by moving the bed 11.

  Therefore, the radiographic imaging apparatus 10 according to the present embodiment can easily change the fluoroscopy / imaging position to a position desired by the operator without irradiating the subject P with radiation, so that the operator can It is possible to align with the imaging position without worrying about the exposure of the specimen P, and imaging can be performed at a more accurate imaging position. In addition, since it is not necessary to perform X-ray irradiation during fine adjustment of the photographing position, the mental burden on the operator can be reduced, work efficiency can be improved, and the time required for fine adjustment of the photographing position can be shortened. .

  In addition, the radiographic imaging apparatus 10 according to the present embodiment can change the relative positions of the bed 11 and the X-ray detector 13 in accordance with a change in the display position of the reference image. In this case, in addition to the above-described effects, a desired imaging position can be accurately determined by operating a display image that is much easier to operate than the movement operation of the bed 11 and the X-ray detector 13. An effect of dramatically improving convenience can be obtained.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment.

1 is a schematic overall configuration diagram showing an embodiment of a radiographic imaging apparatus according to the present invention. The CPU of the fluoroscopic imaging apparatus shown in FIG. 1 changes the display position of the reference image in accordance with the change in the relative position of the bed and the X-ray detector, thereby performing fluoroscopy / imaging without irradiating the subject P with radiation. The flowchart which shows the procedure at the time of changing a position into an operator's desired position. Explanatory drawing which shows an example in the case of moving the reference image on a display part according to the change of a relative position. The CPU of the fluoroscopic imaging apparatus shown in FIG. 1 changes the relative position of the bed and the X-ray detector in accordance with the change in the display position of the reference image, thereby performing fluoroscopy / imaging without irradiating the subject P with radiation. The flowchart which shows the procedure at the time of changing a position into an operator's desired position.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Radiographic imaging apparatus 11 Bed 12 X-ray tube 13 X-ray detector 14 Arm 15 Relative position detection part 21 CPU
22 RAM
23 ROM
24 Network connection unit 25 Input unit 25a Operation panel 25b Drive mechanism operation unit 25c Display image operation unit 26 Display unit 27 Storage unit group 27a Reference image storage unit 27b Initial relative position storage unit 27c Initial display position storage unit 30 X-ray / drive mechanism Control unit 31 X-ray generation control unit 32 Bed drive mechanism 33 Irradiation system drive mechanism

Claims (7)

A bed for supporting the subject; radiation generating means for irradiating the subject with radiation; radiation detecting means for detecting radiation transmitted through the subject disposed opposite to the radiation generating means; and for the detected radiation A radiographic imaging apparatus comprising: an image generation unit that generates a fluoroscopic image and a captured image based on; and a display unit that displays the generated image,
Reference image storage means for storing at least one frame of the fluoroscopic image or at least one of the captured images as a reference image;
Display control means for displaying the reference image on the display means after the radiation irradiation is stopped;
Initial relative position storage means for storing an initial relative position that is a relative position between the bed and the radiation detection means at the time of generation of the reference image;
After the display position of the reference image displayed on the display unit is changed, the relative position between the bed and the radiation detection unit is changed according to the change of the display position based on the operation of the input unit by the operator. A relative position changing means for changing from the initial relative position;
A radiographic imaging apparatus comprising: A displacement conversion unit that calculates a change amount of the relative position from the initial relative position according to a change amount on the display unit of the reference image;
The relative position changing means changes the relative position between the bed and the radiation detecting means from the initial relative position by moving the bed based on the amount of change calculated by the displacement conversion means.
The radiographic imaging apparatus according to claim 1 . A displacement conversion unit that calculates a change amount of the relative position from the initial relative position according to a change amount on the display unit of the reference image;
The relative position changing means, based on the amount of change which the displacement conversion means is calculated, by moving the pre-Symbol radiation detecting means, for changing the relative position between the bed and the radiation detecting means from the initial relative position ,
The radiographic imaging apparatus according to claim 1 . A display image operating means is inputted an instruction from the operator for the direction and amount should be moved to the reference image displayed on the display means,
Based on an instruction of the previous SL display image direction and amount should be moved to the reference image received from the operating means, the display position changing means for changing the display position of the displayed the reference image on the display means,
Further radiographic imaging apparatus according to claim 1, further comprising a. The display image operation means further has a function of receiving an instruction from the operator to change the relative position of the bed and the X-ray detector according to the position of the reference image displayed on the display means. Have
The relative position changing means is provided by the operator that the relative position between the bed and the X-ray detector should be changed according to the position of the reference image displayed on the display means received from the display image operating means. Based on the input instruction, the relative position between the bed and the radiation detection means is changed from the initial relative position according to the change in the display position.
The radiographic imaging apparatus according to claim 4 . A bed for supporting the subject; radiation generating means for irradiating the subject with radiation; radiation detecting means for detecting radiation transmitted through the subject disposed opposite to the radiation generating means; and for the detected radiation A control method for a radiographic imaging apparatus, comprising: an image generation unit that generates a fluoroscopic image and a captured image based on; and a display unit that displays the generated image.
Storing at least one frame of the fluoroscopic image or at least one of the captured images as a reference image;
Displaying the reference image on the display means after the radiation irradiation is stopped;
Storing an initial relative position, which is a relative position between the bed and the radiation detection means when the reference image is generated;
After the display position of the reference image displayed on the display unit is changed, the relative position between the bed and the radiation detection unit is changed according to the change of the display position based on the operation of the input unit by the operator. Changing from the initial relative position;
A control method for a radiographic imaging apparatus, comprising: A step of calculating a change amount from the initial relative position of the relative position according to a change amount on the display unit of the reference image;
The relative position changing means changes the relative position between the bed and the radiation detecting means from the initial relative position by moving the bed based on the amount of change calculated by the displacement conversion means.
The control method of the radiographic imaging apparatus of Claim 6 .

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