JP4234301B2 - Image processing method and apparatus, and recording medium - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an image processing method and apparatus for performing direction conversion processing for reversing or rotating image data based on information relating to a photographing technique such as a photographing direction of a patient as a subject and a direction at the time of photographing. The present invention relates to a computer-readable recording medium on which a program to be executed is recorded.
[0002]
[Prior art]
When the applicant applies radiation (X-rays, α-rays, β-rays, γ-rays, electron beams, ultraviolet rays, etc.), a part of the radiation energy is accumulated, and thereafter, it is accumulated when irradiated with excitation light such as visible light. Using a stimulable phosphor (stimulable phosphor) that generates a quantity of stimulated emission light according to the energy, a radiation image of a subject such as a human body is once recorded and recorded on a sheet-like stimulable phosphor. The stimulable phosphor sheet is scanned with excitation light such as laser light to generate stimulated emission light, and the resulting stimulated emission light is photoelectrically read to obtain image data. A radiation recording / reproducing system that outputs a radiographic image of a subject as a visible image on a recording material such as a photographic material or a monitor such as a CRT based on image data that has undergone image processing after image processing such as gradation processing. Proposed (Japanese Patent Laid-Open No. 55-12429, 5) 6-11395, 55-163472, 56-164645, 55-116340, etc.).
[0003]
In such a system, for example, when obtaining a radiographic image of the chest, radiation is applied from the back side or the abdominal side of the patient, or the patient is directed to the stimulable phosphor sheet side or on the opposite side of the sheet. Shooting is performed by various shooting techniques such as turning the camera. Then, the obtained image data is reversed or rotated based on the photographing technique and is used for reproduction. For example, when imaging is performed by irradiating radiation from the back side of the patient with the patient facing the stimulable phosphor sheet side, the radiation image is as shown in FIG. When observing an image, the heart needs to be positioned on the right side of the image. Therefore, as shown in FIG. 2B, inverted image data obtained by inverting the left and right of the image represented by the original image data is obtained, and this is output as a visible image. Can be obtained.
[0004]
On the other hand, there is a case where a radiographic image is captured using a marker that indicates a radiation imaging direction, a direction of a patient as a subject, and the like. The marker used at this time is made of a metal such as lead that does not transmit radiation. For example, when obtaining a radiographic image of the chest, a marker having a letter shape of “L” is attached to the upper left corner of the sheet, By photographing this marker together with the subject, a radiographic image having the letter “L” at the upper left corner as shown in FIG. When this is actually output as a visible image, the left and right of the original image data are reversed to obtain an image as shown in FIG. In this case, since the character “L” is inverted when the reproduced image is observed, the observer can easily recognize that the left and right sides of the image are inverted.
[0005]
[Problems to be solved by the invention]
By the way, it is conceivable that digital marker data representing the marker is added to the image data instead of photographing the marker described above together with the subject. In this way, if marker data is added to image data, a radiographic image provided at a desired position of the marker can be obtained, and a marker having an arbitrary shape can be included in the radiographic image. Because it is convenient.
[0006]
However, since the image data to which the marker data is added may be reversed or rotated based on the information representing the shooting technique as described above, the marker data is directly added to the direction-converted image data. In this case, for example, when the marker data represents a marker of the character “L”, the direction of the marker is changed although the image represented by the image data is changed in direction as shown in FIG. It will be added to the image in a non-converted state. For this reason, a person who observes the radiographic image misunderstands that the radiographic image has not been subjected to direction change, and may cause a diagnosis error or the like.
[0007]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an image processing method and apparatus capable of adding marker data to image data in an appropriate state in accordance with a shooting technique.
[0008]
[Means for Solving the Problems]
A first image processing method according to the present invention is an image processing method for performing a direction conversion process on image data based on information on a shooting technique.
When providing a marker represented by marker data on the image represented by the image data, based on the information on the imaging technique, determine the direction of the marker data and the position to apply the marker data,
The marker data is assigned to the image data based on the determined direction and the assigned position.
[0009]
Here, “imaging technique” refers to the incident direction of radiation at the time of imaging, the orientation of the patient as a subject (positioning), the orientation of a sheet on which radiographic images are accumulated and recorded, and the like.
[0010]
The “direction conversion process” refers to a process of rotating or inverting image data so that an image observed from a desired direction is obtained when the image data is reproduced. Note that the term “rotation” refers to rotating the image represented by the image data at a desired angle with the center of gravity, for example, as the center of rotation. Inversion means that the image represented by the image data is inverted symmetrically with respect to a certain axis, for example.
[0011]
Further, “determining the direction and position of marker data based on information related to the imaging technique” is included in the radiographic image after the direction conversion process in the radiographic image obtained by imaging using the marker. The direction of the marker data and the position of the marker so that the direction of the marker data and the position of the marker in the radiographic image obtained by reproducing the image data to which the marker data is added (after the direction conversion process) match. And determining the position of application.
[0012]
“Applying marker data to image data” refers to replacing image data with marker data at a position where marker data is to be added, and providing marker data as overlay data of image data. Note that the image data to which the marker data is added may be the one after the direction change or the one before the direction change.
[0013]
In the first image processing method according to the present invention, the size of the marker data is further changed based on the size of the image represented by the image data and / or the reading density when the image data is obtained. It is preferable.
[0014]
In the first image processing method according to the present invention, when the size of the image represented by the image data and / or the image data is obtained from marker data representing markers of a plurality of sizes prepared in advance. Select marker data that represents a marker of a size that fits the reading density,
It is preferable to determine the direction and the application position of the selected marker data.
[0015]
Furthermore, in the first image processing method according to the present invention, the data value of the image data in the vicinity of the marker data application position is substantially the same value as the data value of the marker data (for example, 255 or a value close to this in the case of 8 bits). ), It is preferable to change the data value of the marker data so that the marker data can be visualized and / or change the data value of the image data in the vicinity of the applying position to add the marker data to the image data. .
[0016]
A second image processing method according to the present invention is an image processing method for performing a direction conversion process on image data based on information on a shooting technique.
When giving a marker represented by marker data on an image represented by the image data,
The direction conversion process is performed on the image data,
An image represented by the image data subjected to the direction conversion processing is displayed on a display unit together with a pointer indicating an arbitrary position on the image;
Change the direction of the marker data based on the information on the shooting technique,
Change the shape of the pointer to the shape of the marker represented by the changed marker data,
Based on the pointer position change instruction, change the position of the marker on the image,
The marker data is attached to the image data based on an instruction to attach the marker at a desired position on the image displayed on the display means.
[0017]
In the second image processing method according to the present invention, the size of the marker data is further changed based on the size of the image represented by the image data and / or the reading density when the image data is obtained. It is preferable.
[0018]
In the second image processing method according to the present invention, the size of the image represented by the image data and / or the image data is obtained from marker data representing markers of a plurality of sizes prepared in advance. Select marker data that represents a marker of a size that fits the reading density,
Preferably, the direction of the selected marker data is determined.
[0019]
Furthermore, in the second image processing method according to the present invention, when the data value of the image data in the vicinity of the marker data application position is substantially the same as the data value of the marker data, Similar to the image processing method, it is preferable to change the data value of the marker data so that the marker data can be visualized and / or to change the data value of the image data in the vicinity of the applying position and to add the marker data to the image data. .
[0020]
A first image processing apparatus according to the present invention is an image processing apparatus including a conversion unit that performs a direction conversion process on image data based on information on a shooting technique.
A determination unit that determines a direction of the marker data and a position to which the marker data is applied, based on information on the photographing technique, when the marker represented by the marker data is attached to the image represented by the image data;
The image forming apparatus includes an adding unit that adds the marker data to the image data based on the determined direction and the adding position.
[0021]
In the first image processing apparatus according to the present invention, the determining means may determine the marker data based on the size of the image represented by the image data and / or the reading density when the image data is obtained. A means for further changing the size is preferable.
[0022]
In the first image processing apparatus according to the present invention, storage means for storing marker data representing markers of a plurality of sizes prepared in advance;
Marker data representing a marker of a size suitable for the size of the image represented by the image data and / or the reading density when the image data is obtained from the marker data representing the markers of a plurality of sizes stored in the storage means And a selection means for selecting
The determination means is preferably means for determining a direction and a given position of the selected marker data.
[0023]
Furthermore, in the first image processing apparatus according to the present invention, when the data value of the marker data and the data value of the image data in the vicinity of the marker data application position substantially match, the data of the marker data It is preferable to further include a data value changing means for changing the value and / or the data value of the image data in the vicinity of the marker data application position.
[0024]
A second image processing apparatus according to the present invention is an image processing apparatus including a conversion unit that performs a direction conversion process on image data based on information on a shooting technique.
Display means for displaying an image represented by the image data subjected to the direction conversion processing by the conversion means together with a pointer pointing to an arbitrary position on the image;
Marker changing means for changing the direction of marker data representing a marker to be provided on the image represented by the image data, based on the information relating to the photographing technique;
Pointer changing means for changing the shape of the pointer to the shape of the marker represented by the changed marker data;
Position changing means for changing the position of the marker on the image based on the pointer position change instruction;
The image processing apparatus includes an adding unit that adds the marker data to the image data based on an instruction to add the marker at a desired position on the image displayed on the display unit.
[0025]
In the second image processing apparatus according to the present invention, the determining means may determine the marker data based on the size of the image represented by the image data and / or the reading density when the image data is obtained. A means for further changing the size is preferable.
[0026]
Further, in the second image processing apparatus according to the present invention, storage means for storing marker data representing markers of a plurality of sizes prepared in advance,
Marker data representing a marker of a size suitable for the size of the image represented by the image data and / or the reading density when the image data is obtained from the marker data representing the markers of a plurality of sizes stored in the storage means And a selection means for selecting
The marker changing means is preferably means for changing the direction of the selected marker data.
[0027]
Furthermore, in the second image processing apparatus according to the present invention, when the data value of the marker data and the data value of the image data in the vicinity of the marker data application position substantially match, the data of the marker data It is preferable to further include a data value changing means for changing the value and / or the data value of the image data in the vicinity of the marker data application position.
[0028]
The first and second image processing methods according to the present invention may be provided by being recorded on a computer-readable recording medium as a program for causing a computer to execute the method.
[0029]
【The invention's effect】
According to the first image processing method and apparatus of the present invention, when the marker represented by the marker data is applied on the image represented by the image data, the direction and the application of the marker data based on the information related to the imaging technique. The position is determined. Here, the direction and position of the marker data are the direction and position of the marker included in the radiographic image and the image data to which the marker data is added in the radiographic image obtained by imaging using the marker. Is determined so that the marker direction and the applied position in the radiographic image obtained by reproducing the image are the same. Therefore, according to the image data direction conversion processing, the marker represented by the marker data can be added to the image represented by the image data in the same manner as when shooting was actually performed using the marker. As a result, it is possible to prevent misdiagnosis of the inversion or rotation direction of the radiographic image to cause a diagnosis error or the like.
[0030]
Further, according to the second image processing method and apparatus of the present invention, an image represented by the image data subjected to the direction conversion process is displayed on the display means. Then, the direction of the marker data is changed based on the information related to the shooting technique, and the shape of the pointer displayed on the display means is changed to the shape of the marker represented by the marker data whose direction has been changed. Next, the position of the marker on the image is changed based on an instruction to change the position of the pointer, and marker data is added to the image data based on an instruction to give a marker at a desired position on the image. Thereby, it is possible to confirm an image in which a marker is actually provided on the display means, and thereby it is possible to easily determine the marker application position.
[0031]
In the first and second image processing methods and apparatuses according to the present invention, the size of the marker data is changed based on the size of the image represented by the image data and / or the reading density when the image data is obtained. Accordingly, a marker having a size suitable for the size and / or reading density of the image can be displayed on the image, thereby making it easy to see the marker.
[0032]
Further, in the first and second image processing methods and apparatuses according to the present invention, the size and / or image data of the image represented by the image data is obtained from the marker data representing the markers of a plurality of sizes prepared in advance. By selecting marker data representing a marker of a size suitable for the reading density at the time, and determining or changing the direction and position of the selected marker data, the size and / or the reading density of the selected image is adapted. A size marker can be displayed on the image, which makes it easier to see the marker.
[0033]
Further, in the first and second image processing methods and apparatuses according to the present invention, when the data value of the marker data and the data value of the image data in the vicinity of the marker data application position substantially coincide, the data value of the marker data And / or by changing the data value of the image data in the vicinity of the marker data application position, for example, even when a white marker is applied to a white region on the image, the marker can be easily seen.
[0034]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0035]
FIG. 1 is a schematic block diagram showing the configuration of a radiation image output system to which the image processing apparatus according to the first embodiment of the present invention is applied. As shown in FIG. 1, the radiation image output system according to the first embodiment is based on an image generation device 1 that obtains image data S0 representing a radiation image by photographing a radiation image of a subject, and a photographing technique at the time of photographing. The image processing apparatus 2 performs direction conversion processing on the image data S0, adds marker data to the image data S0, and further performs image processing such as gradation processing and frequency processing to obtain processed image data S2. And an output device 3 that prints out the processed image data S2.
[0036]
The image generation apparatus 1 includes a sheet holding unit 18 that holds the radiation source 16 and the stimulable phosphor sheet 17, and irradiates the stimulable phosphor sheet 17 with radiation that has passed through the subject, thereby causing the sheet 17 to have a radiation image of the subject. Imaging means 11 for storing and recording, reading means 12 for photoelectrically reading the radiation image from the sheet 17 on which the radiation image is accumulated and recorded to obtain image data S0 representing the radiation image, patient name, examination name, imaging technique, etc. IDT (ID terminal) 13 for inputting various information. In the imaging unit 11, the patient as a subject is directed toward the stimulable phosphor sheet 17, and radiation is irradiated from the patient's back side to accumulate and record a radiation image of the patient's chest on the sheet 17. Then, the radiographic image is photoelectrically read by the reading means 12 from the stimulable phosphor sheet 17 on which the radiographic image is accumulated and recorded, and image data S0 representing the radiographic image of the subject is obtained. Information such as a patient name, examination name, and imaging technique (hereinafter referred to as ID information T) is input from the IDT 13 during imaging. Here, in the present embodiment, the information relating to the imaging technique is information indicating that imaging is performed by irradiating radiation from the patient's back with the patient facing the stimulable phosphor sheet 17 side.
[0037]
The image processing apparatus 2 determines the marker direction and the assigned position represented by the marker data M based on the memory 21 storing the marker data M and the ID information T input from the IDT 13 of the image generation apparatus 1. Means 22, giving means 23 for giving the marker data M to the image data S 0, and image data that has undergone direction conversion by applying a direction changing process to the image data S 0 to which the marker data M is given based on the ID information T Conversion means 24 for obtaining S1 and processing means 25 for obtaining processed image data S2 by performing image processing such as gradation processing and frequency processing on the image data S1.
[0038]
In the determination means 22, the direction and the application position of the marker data M with respect to the image data S0 are determined as follows. The image data S0 obtained in the image generating device 1 is obtained by irradiating radiation from the back side of the patient facing the sheet 17 and accumulating and recording the radiation image of the patient on the sheet 17. The radiation image obtained by reproducing the data S0 is as shown in FIG. Here, when the diagnosis is actually performed, as shown in FIG. 2B, it is necessary to reproduce the image so that the patient faces the patient and the heart is on the right side. For this reason, in the conversion means 24, the left and right sides of the image data S0 representing the image shown in FIG. 2A are inverted based on the ID information T with respect to the axis extending in the vertical direction with respect to the paper surface, and FIG. ), Image data S1 representing an image in which the heart is located on the right side is obtained.
[0039]
Here, at the time of radiographic imaging, an “L” -shaped marker indicating that the sheet 17 is on the left side may be attached in the vicinity of the patient's left shoulder. In such a case, the image represented by the image data S0 includes the character “L” as shown in FIG. 3A, and the image data S1 obtained by inverting the left and right in the conversion means 24. As shown in FIG. 3B, the displayed image is in a state in which the letter “L” is also inverted. The doctor observing the image can recognize that the entire image is inverted by confirming that the marker is inverted. Accordingly, in the determining means 22, when the image data S0 is inverted in the converting means 24, the marker data M is displayed in the image so that the letter “L” is displayed in reverse as shown in FIG. Assigned to data S0. Specifically, as shown in FIG. 4, the letter “L” is given to the vicinity of the patient's left shoulder in the image represented by the image data S0 without any inversion. Note that the marker data M may be added by replacing the image data S0 with the marker data M at the position where the marker data M is added, or the marker data M may be added as overlay data of the image data S0.
[0040]
As described above, when the image data S1 obtained by inverting the image data S0 to which the marker data M is applied by reproducing the marker data M to the image data S0 is reproduced, the reproduced image is shown in FIG. As shown, it is the same as the case where photographing is actually performed using a marker.
[0041]
Next, the operation of the first embodiment will be described. FIG. 5 is a flowchart showing the operation of the first embodiment. First, the image generation apparatus 1 captures a patient as a subject and generates image data S0 representing a radiation image (step S1). At this time, ID information T representing the patient name, examination number, imaging technique, etc. is input from the IDT 13 (step S2). The image data S0 and the ID information T are input to the image processing device 2. In the determination means 22 of the image processing apparatus 2, the marker data M stored in the memory 21 is read, and the direction and application position of the marker data M are determined based on the ID information T (step S3). Then, as shown in FIG. 4, the marker data M is added to the image data S0 by the adding means 23 (step S4). An image obtained by reproducing the image data S0 to which the marker data M is given is as shown in FIG.
[0042]
The image data S0 to which the marker data M is given is input to the conversion means 24, where the direction conversion processing is performed based on the ID information T, and the image data S1 is obtained (step S5). An image obtained by reproducing the image data S1 is as shown in FIG. The image data S1 obtained in this way is input to the processing means 25, where image processing such as gradation processing and frequency processing is performed to obtain processed image data S2 (step S6). The processed image data S2 is input to the output device 3, where it is reproduced as a visible image (step S7) and used for diagnosis.
[0043]
As described above, in the first embodiment, the direction and position of the marker data M are determined and assigned to the image data S0 based on the ID information T at the time of photographing the subject. According to the direction conversion process, the marker data M can be added to the image data S0 in the same way as when imaging is actually performed using the marker, thereby misunderstanding the inversion and rotation direction of the radiation image. It is possible to prevent a diagnosis error or the like from being caused.
[0044]
Next, a second embodiment of the present invention will be described. FIG. 6 is a schematic block diagram showing the configuration of a radiation image output system to which the image processing apparatus according to the second embodiment of the present invention is applied. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. In the second embodiment, only the reading unit 12 and the IDT 13 are shown for the image generating apparatus 1. The image processing device 2 ′ according to the second embodiment changes the direction of the marker data M based on the memory 21 storing the marker data M and the ID information T input from the IDT 13 of the image generation device 1. Marker changing means 30 for obtaining changed marker data M ′, conversion means 24 ′ for obtaining direction-converted image data S 10 by subjecting image data S 0 to direction conversion based on ID information T, and image data Displayed on the display means 31 is a display means 31 composed of a CRT monitor, a liquid crystal monitor, etc. for displaying the image represented by S10, an input means 32 composed of a mouse and a keyboard for making various inputs to the display means 31, and a display means 31. In the pointer changing means 33 for changing the shape of the pointer to the shape of the marker represented by the marker data M ′, and in the input means 32 as will be described later Based on the determined marker giving instruction F, the giving means 23 'for giving the marker data M' to the image data S0 to obtain the image data S11, and an image such as gradation processing and frequency processing for the image data S11. And processing means 25 'for obtaining processed image data S12 by processing.
[0045]
Next, the operation of the second embodiment will be described. FIG. 7 is a flowchart showing the operation of the second embodiment, and FIG. First, the image generating apparatus 1 captures a patient as a subject and generates image data S0 representing a radiation image (step S11). At this time, ID information T representing the patient name, examination number, imaging technique, etc. is input from the IDT 13 (step S12). The image data S0 and the ID information T are input to the image processing device 2. In the conversion means 24 ′ of the image processing apparatus 2, the image data S0 is subjected to the direction conversion process based on the ID information T to obtain the image data S10 (step S13). The image data S10 is displayed on the display means 31 (step S14).
[0046]
Here, the image data S0 obtained in the image generating device 1 is obtained by irradiating radiation from the back side of the patient facing the sheet 17 and accumulating and recording the radiation image of the patient on the sheet 17. In some cases, the radiation image obtained by reproducing the image data S0 is as shown in FIG. In the conversion means 24 'in the second embodiment, based on the ID information T, the left and right sides of the image data S0 representing the image shown in FIG. As shown in FIG. 2B, image data S10 representing an image in which the heart is located on the right side is obtained. Then, a radiation image as shown in FIG. 2B is displayed on the display means 31.
[0047]
On the other hand, the marker changing means 30 reads the marker data M stored in the memory 21 and changes the direction of the marker data M based on the ID information T to obtain the marker data M ′ (step S15). Then, the pointer changing means 33 changes the pointer shape displayed on the display means 31 to the marker shape represented by the marker data M '(step S16). For example, when the marker represented by the marker data M has an “L” shape, the marker represented by the marker data M ′ has an “L” shape in which left and right are reversed. Therefore, when the pointer is in the shape of an arrow as shown in FIG. 8A, an “L” shape in which the shape of the pointer is reversed left and right as shown in FIG. It becomes.
[0048]
When the position of the pointer is moved on the image displayed on the display unit 31 by operating the mouse of the input unit 32, the marker to be added is moved. Then, it is determined whether or not the input means 32 is instructed to apply a marker at a desired application position (step S17). When step S17 is affirmed, an application instruction F representing the instruction is provided. 23 '.
[0049]
In the assigning means 23, the marker data M ′ is assigned to the image data S10 based on the assigning instruction F to obtain the image data S11 (step S18). An image obtained by reproducing the image data S11 is as shown in FIG. In this way, the image data S11 representing the image to which the marker data M ′ is given is input to the processing means 25, where image processing such as gradation processing and frequency processing is performed to obtain processed image data S12. (Step S19). The processed image data S12 is input to the output device 3, where it is reproduced as a visible image (step S20) and used for diagnosis.
[0050]
As described above, in the second embodiment, the image represented by the image data S10 subjected to the direction conversion process is displayed on the display unit 31, and the shape of the pointer displayed on the display unit 31 is changed in direction. Since the marker shape is changed to the shape of the marker represented by the marker data M ′ and the marker data M ′ is assigned to the image data S10 based on the marker assignment instruction at the desired position on the image, the display means 31 It is possible to confirm an image in a state where a marker is actually applied in step (b), and thereby it is possible to easily determine the marker application position.
[0051]
Next, a third embodiment of the present invention will be described. FIG. 9 is a schematic block diagram showing a configuration of a radiation image output system to which an image processing apparatus according to the third embodiment of the present invention is applied. In the third embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. In the third embodiment, only the reading unit 12 and the IDT 13 are shown for the image generating apparatus 1. In the image processing apparatus according to the third embodiment, the determination unit 22 determines the marker data M based on the size of the image represented by the image data S0 and / or the reading density when the reading unit 12 obtains the image data S0. The size is changed, the marker direction and the application position are determined based on the imaging technique, and the application unit 23 applies the marker data M to the image data S0. For this reason, the image data 0 and / or information H relating to the reading density output from the reading unit 12 is input to the determining unit 22.
[0052]
The size change of the marker data M in the determination means 22 is performed as follows. Here, in the present embodiment, it is assumed that the marker data M has a size suitable for an image having a predetermined size or a predetermined reading density. First, the change of the size of the marker data M based on the size of the image data S0 is obtained by calculating the ratio between the long side of the image represented by the image data S0 and the long side of the image of the predetermined size, and based on this ratio This is done by changing the size of the data M. For example, when an image of a predetermined size is 800 × 600 size, an image represented by the image data S0 is 1200 × 900 size, and a marker represented by the marker data M is 40 × 30 size, the marker data M is 1.5 times It will be changed to 60 × 45 size which is the size of.
[0053]
On the other hand, the change of the size of the marker data M based on the information H regarding the reading density is based on the ratio between the pixel size when the image is read at the predetermined reading density and the pixel size of the image represented by the image data S0. This is done by changing the size of the marker data M so that the size of the above marker is constant regardless of the pixel size. For example, when the predetermined reading density is 600 dpi and the reading density of the image data S0 is 1200 dpi, the pixel size is ½ of the former, so when the marker is 40 × 30 size, the image represented by the image data S0. In order to prevent the marker size from being changed above, the marker data M is changed to an 80 × 60 size which is twice the size.
[0054]
Further, in order to change the size of the marker data M based on the information H on the size and reading density of the image data S0, the ratio between the long side of the image represented by the image data S0 and the long side of the image of the predetermined size The size of the marker data M may be changed according to the ratio between the pixel size when the image is read at a predetermined reading density and the pixel size of the image represented by the image data S0.
[0055]
Next, the operation of the third embodiment will be described. FIG. 10 is a flowchart showing the operation of the third embodiment. First, in the image generation device 1, a patient who is a subject is imaged to generate image data S0 representing a radiographic image (step S21). At this time, ID information T representing the patient name, examination number, imaging technique, etc. is input from the IDT 13 (step S22). Information H relating to the reading density when the image data S0, the ID information T, and the image data S0 are obtained is input to the image processing apparatus 2. In the determination means 22 of the image processing apparatus 2, the marker data M stored in the memory 21 is read, and the size of the marker data M is determined based on the information H relating to the size and / or reading density of the image represented by the image data S0. Is changed (step S23). Further, the direction and position of the marker data M are determined based on the ID information T (step S24). Then, in the assigning unit 23, the marker data M is assigned to the image data S0 (step S25).
[0056]
In steps S26 to S28, the direction conversion process, the image process, and the reproduction of the processed image data S2 are performed in the same manner as in steps S5 to S7 in the first embodiment.
[0057]
As described above, in the third embodiment, the size of the marker data M is changed based on the size of the image represented by the image data S0 and / or the reading density when the image data S0 is obtained. A marker suitable for the size of the image can be displayed on the image, thereby making it easier to see the marker.
[0058]
As in the image processing apparatus according to the fourth embodiment shown in FIG. 11, the image data S0 and / or the reading means 12 output to the marker changing unit 30 of the image processing apparatus 2 ′ according to the second embodiment. Information H relating to the reading density is input, and based on the size of the image represented by the image data S0 and / or the reading density when the image data S0 is obtained, as in the determination unit 22 in the third embodiment. The size of the marker data M may be changed.
[0059]
Next, a fifth embodiment of the present invention will be described. FIG. 12 is a schematic block diagram showing a configuration of a radiation image output system to which an image processing apparatus according to the fifth embodiment of the present invention is applied. Note that the same reference numerals in the fifth embodiment denote the same parts as those in the first embodiment, and a detailed description thereof will be omitted. In the fifth embodiment, only the reading unit 12 and the IDT 13 are shown for the image generating apparatus 1. The image processing apparatus according to the fifth embodiment stores a plurality of sizes of marker data M in the memory 21 in advance, and obtains the image data S0 in the image size and / or reading means 12 represented by the image data S0. Marker data M representing a marker having a size suitable for the reading density at the time is selected from marker data of a plurality of sizes stored in the memory 21 by the selecting means 26, and using the selected marker data M, the determining means 22 is selected. The direction of the marker and the applied position are determined based on the imaging technique. Therefore, the selection unit 26 receives the image data S0 and / or the information H related to the reading density output from the reading unit 12.
[0060]
The selection of the size of the marker data M in the selection means 26 is performed as follows. Here, in the present embodiment, it is assumed that a predetermined size image or a predetermined reading density as a reference is predetermined. First, the selection of the size of the marker data M based on the size of the image data S0 is performed by obtaining the ratio between the long side of the image represented by the image data S0 and the long side of the image of the predetermined size, and based on this ratio, the marker This is done by selecting the size of the data M. For example, when the image of a predetermined size is 800 × 600 size, the image represented by the image data S0 is 1200 × 900 size, and the marker represented by the marker data M matching the image of the predetermined size is 40 × 30 size, the marker Data M having a size of 60 × 45, which is 1.5 times the size, is selected.
[0061]
On the other hand, the selection of the size of the marker data M based on the information H relating to the reading density is based on the ratio between the pixel size when the image is read at the predetermined reading density and the pixel size of the image represented by the image data S0. This is done by selecting the size of the marker data M so that the size of the above marker is constant regardless of the pixel size. For example, when the predetermined reading density is 600 dpi and the reading density of the image data S0 is 1200 dpi, the pixel size is ½ that of the former. Therefore, when the marker conforming to the predetermined reading density is 40 × 30 size, the image data In order to prevent the marker size from being changed on the image represented by S0, the marker data M having a size of 80 × 60, which is twice the size, is selected.
[0062]
Further, in order to select the size of the marker data M based on the information H on the size and reading density of the image data S0, the ratio between the long side of the image represented by the image data S0 and the long side of the image of the predetermined size The size of the marker data M may be selected according to the ratio between the pixel size when the image is read at a predetermined reading density and the pixel size of the image represented by the image data S0.
[0063]
Next, the operation of the fifth embodiment will be described. FIG. 13 is a flowchart showing the operation of the fifth embodiment. First, in steps S31 and S32, as in steps S1 and S2 of the first embodiment, generation of image data S0 and input of ID information are performed. Further, information H regarding the reading density when the image data S0, the ID information T, and the image data S0 are obtained is input to the image processing apparatus 2. In the selection unit 26 of the image processing apparatus 2, the size of the marker data M is selected based on the information H on the size and / or reading density of the image data S0 (step S33), and the marker data M of the selected size is stored. The data is read from the memory 21, and the direction and application position of the marker data M are determined based on the ID information T (step S34). Then, in the assigning unit 23, the marker data M is given to the image data S0 (step S35).
[0064]
In steps S36 to S38, the direction conversion process, the image process, and the reproduction of the processed image data S2 are performed in the same manner as in steps S5 to S7 in the first embodiment.
[0065]
As described above, in the fifth embodiment, when the size of the image represented by the image data S0 and / or the image data S0 is obtained from the marker data representing the markers of a plurality of sizes prepared in the memory 21 in advance. Since marker data having a size suitable for the reading density is selected and added to the image data S0, a marker suitable for the size of the image can be displayed on the image, thereby making it easier to see the marker.
[0066]
As in the image processing apparatus 2 ′ according to the sixth embodiment shown in FIG. 14, the marker data M having a plurality of sizes is stored in the memory 21 of the image processing apparatus according to the second embodiment in advance and is selected. 26, and marker data M representing a marker having a size suitable for the size of the image represented by the image data S0 and / or the reading density when the reading unit 12 obtains the image data S0 is stored in the memory 21. The marker data may be selected from a plurality of sizes of marker data by the selection unit 26, and the marker change unit 30 may determine the marker direction based on the imaging technique using the selected marker data M.
[0067]
In the first to sixth embodiments, the value of the image data S0 in the vicinity of the application position of the marker data M is substantially the same value as the marker data M (for example, 255 or a value close to this in the case of 8 bits). In some cases, it is difficult to visually recognize the marker even when the image with the marker is reproduced. Therefore, as in the seventh embodiment according to the present invention shown in FIG. 15, the data value of the marker data M and the data of the image data S1 in the vicinity of the position where the marker data M is provided are between the conversion means 24 and the processing means 25. When the values substantially match, it is preferable to provide data value changing means 40 for changing the data value of the marker data M and / or the data value of the image data S1 near the marker data application position.
[0068]
For example, the data value changing unit 40 obtains a difference value between the data value of the marker data M and the data value of the image data S1 in the vicinity of the application position of the marker data M, and when the difference value is equal to or less than a predetermined threshold value. The data value of the marker data M and / or the data value of the image data S1 are changed. Specifically, the data value of the marker data M is the inverted value of the data value of the image data S1 in the vicinity of the application position, and the data value of the marker data M is a value obtained by adding or subtracting a predetermined value to the image data S1 in the vicinity of the application position. The data value of the image data S1 in the vicinity of the application position is the inverted value of the data value of the marker data M, and the data value of the image data S1 in the vicinity of the application position is a value obtained by adding or subtracting a predetermined value to the marker data M. Thus, the data value of the marker data M and / or the data value of the image data S1 can be changed.
[0069]
As described above, when the data value of the marker data M and the data value of the image data S1 in the vicinity of the marker data application position substantially coincide with each other, the data value of the marker data M and / or the image data in the vicinity of the marker data application position. By changing the data value of S1, for example, even when a white marker is added to a white region on the image, the marker can be easily seen.
[0070]
In the seventh embodiment, the data value changing means 40 is provided in the image processing apparatus according to the first embodiment of the present invention, but the image processing apparatuses according to the second to sixth embodiments are also provided. Similarly, data value changing means 40 can be provided. Here, in the second, fourth and sixth embodiments, the data value changing means 40 may be provided between the assigning means 23 'and the processing means 25'.
[0071]
In each of the above-described embodiments, the marker data M is added to the image data S0 when the image data S0 is inverted. However, for example, when a large patient is photographed, the stimulable phosphor sheet 17 is used. May be rotated 90 degrees to capture a wider range in the horizontal direction than in the vertical direction relative to the body. Even in such a case, since the sheet 17 is conveyed and read in the longitudinal direction in the reading unit 12, an image obtained by reproducing the image data S0 as it is is shown in FIG. It will be a thing. At this time, since the ID information T includes information indicating that the sheet 17 is photographed with the sheet 17 being placed in the horizontal direction, the conversion means 24, 24 'converts the image data S0 to 90 degrees counterclockwise. After the rotation, the image data S1 can be obtained by reversing the image as shown in FIG.
[0072]
At this time, when radiographing is performed, if an L-shaped marker is pasted near the left shoulder of the patient on the sheet 17, the image represented by the image data S0 is shown in FIG. An image represented by the image data S1 obtained by rotating the image data S0 by 90 degrees counterclockwise in the conversion means 24, 24 'and inverting the left and right is shown in FIG. Thus, the letter “L” is also rotated and reversed. The doctor who observes the image can recognize that the entire image is rotated and inverted by confirming that the marker is rotated and inverted.
[0073]
Therefore, in the determining means 22 in the first, third and fifth embodiments, when the image data S0 is rotated and inverted by the converting means 24, the character "L" is shown as shown in FIG. The direction of the marker data M and the application position are determined so that is inverted and displayed. Specifically, as shown in FIG. 18, the letter “L” is given in the vicinity of the patient's left shoulder in the image represented by the image data S0 by rotating 90 degrees clockwise and without being reversed. As described above, when the image data S1 obtained by reversing the image data S0 to which the marker data M is added by adding the marker data M to the image data S0, the reproduced image is shown in FIG. As shown, it is the same as the case where photographing is actually performed using a marker.
[0074]
On the other hand, in the marker changing means 30 in the second, fourth and sixth embodiments, when the image data S0 is rotated and inverted by the converting means 24 ′, “L” as shown in FIG. The direction of the marker data M is changed so that the characters are highlighted and the marker data M ′ is obtained. Therefore, when the image data S11 to which the marker data M is added is reproduced by adding the marker data M ′ to the image data S0, the reproduced image is actually captured using the marker as shown in FIG. It will be the same as if done.
[0075]
In the first, third, and fifth embodiments, the direction conversion process is performed after the marker data M is added to the image data S0. However, the direction of the image data S0 before the marker data M is applied is changed. Then, the image data S1 may be obtained, and the marker data M whose direction and position are determined based on the shooting technique may be applied to the image data S1.
[Brief description of the drawings]
FIG. 1 is a schematic block diagram showing the configuration of a radiation image output system to which an image processing apparatus according to a first embodiment of the present invention is applied.
FIG. 2 is a diagram showing a radiation image obtained by reproducing image data
FIG. 3 is a view showing a radiographic image obtained by reproducing image data obtained by photographing using a marker.
FIG. 4 is a diagram for explaining the assignment of marker data
FIG. 5 is a flowchart showing the operation of the first embodiment.
FIG. 6 is a schematic block diagram showing a configuration of a radiation image output system to which an image processing apparatus according to a second embodiment of the present invention is applied.
FIG. 7 is a flowchart showing the operation of the second embodiment.
FIG. 8 is a diagram for explaining a marker data application state in the second embodiment;
FIG. 9 is a schematic block diagram showing a configuration of a radiation image output system to which an image processing apparatus according to a third embodiment of the present invention is applied.
FIG. 10 is a flowchart showing the operation of the third embodiment.
FIG. 11 is a schematic block diagram showing a configuration of a radiation image output system to which an image processing apparatus according to a fourth embodiment of the present invention is applied.
FIG. 12 is a schematic block diagram showing a configuration of a radiation image output system to which an image processing apparatus according to a fifth embodiment of the present invention is applied.
FIG. 13 is a flowchart showing the operation of the fifth embodiment.
FIG. 14 is a schematic block diagram showing the configuration of a radiation image output system to which an image processing apparatus according to a sixth embodiment of the present invention is applied.
FIG. 15 is a schematic block diagram showing a configuration of a radiation image output system to which an image processing apparatus according to a seventh embodiment of the present invention is applied.
FIG. 16 is a diagram showing a radiographic image obtained by reproducing image data
FIG. 17 is a view showing a radiographic image obtained by reproducing image data obtained by performing imaging using a marker.
FIG. 18 is a diagram for explaining the assignment of marker data;
FIG. 19 is a diagram illustrating a state in which marker data is added to inverted image data.
[Explanation of symbols]
1 Image generator
2 Image processing device
3 Output device
11 Photography means
12 Reading means
13 IDT
21 memory
22 Determination means
23, 23 'giving means
24, 24 'conversion means
25,25 'processing means
26 selection means
30 Marker changing means
31 Display means
32 Input means
33 Pointer changing means
40 Data value changing means

Claims (18)

In an image processing method for performing a direction conversion process on image data based on information on a shooting technique,
When the determination unit adds the marker represented by the marker data on the image represented by the image data , the determination unit determines the direction of the marker data and the application position of the marker data based on the information related to the photographing technique. ,
When the data value changing unit substantially matches the data value of the marker data and the data value of the image data in the vicinity of the marker data application position, the data value of the marker data and / or the marker data application Change the data value of the image data near the position,
Applying means, an image processing method characterized by based on the determined direction and the assigned position, imparts the marker data to the image data. 2. The size of the marker data is further changed based on a size of an image represented by the image data and / or a reading density when the image data is obtained. Image processing method. The selection unit represents a marker having a size that matches the size of the image represented by the image data and / or the reading density when the image data is obtained from marker data representing markers of a plurality of sizes prepared in advance. Select marker data,
The image processing method according to claim 1 , wherein the determining unit determines a direction and an applied position of the selected marker data. In an image processing method for performing a direction conversion process on image data based on information on a shooting technique,
When giving a marker represented by marker data on an image represented by the image data,
The conversion means performs the direction conversion process on the image data,
Display means, an image in which the direction changing process is represented by the image data subjected, Displays with a pointer that points to an arbitrary position on the image,
Marker changing means changes the direction of the marker data based on information on the shooting technique,
The pointer changing means changes the shape of the pointer to the shape of the marker represented by the changed marker data,
The position changing means changes the position of the marker on the image based on the pointer position change instruction,
An assigning means assigns the marker data to the image data based on an instruction to give the marker at a desired position on the image displayed on the display means ,
When the data value changing unit substantially matches the data value of the marker data and the data value of the image data in the vicinity of the marker data application position, the data value of the marker data and / or the marker data application An image processing method characterized by changing a data value of the image data in the vicinity of a position . The marker changing means, on the basis of the read density when obtaining the size and / or the image data of the image represented by the image data, according to claim 4, characterized by further changing the size of the marker data The image processing method as described. The selection unit represents a marker having a size that matches the size of the image represented by the image data and / or the reading density when the image data is obtained from marker data representing markers of a plurality of sizes prepared in advance. Select marker data,
The image processing method according to claim 4 , wherein the marker changing unit changes the direction of the selected marker data. In an image processing apparatus provided with conversion means for performing a direction conversion process on image data based on information on a shooting technique,
A determination unit that determines a direction of the marker data and a position to which the marker data is applied, based on information on the photographing technique, when the marker represented by the marker data is attached to the image represented by the image data;
A granting unit for granting the marker data to the image data based on the determined direction and the granting position ;
When the data value of the marker data and the data value of the image data in the vicinity of the marker data application position substantially match, the data value of the marker data and / or the image data in the vicinity of the marker data application position An image processing apparatus comprising data value changing means for changing the data value . The determination means is means for further changing the size of the marker data based on the size of the image represented by the image data and / or the reading density when the image data is obtained. Item 8. The image processing apparatus according to Item 7 . Storage means for storing marker data representing markers of a plurality of sizes prepared in advance;
Marker data representing a marker of a size suitable for the size of the image represented by the image data and / or the reading density when the image data is obtained from the marker data representing the markers of a plurality of sizes stored in the storage means And a selection means for selecting
The image processing apparatus according to claim 7 , wherein the determining unit is a unit that determines a direction and a given position of the selected marker data. In an image processing apparatus provided with conversion means for performing a direction conversion process on image data based on information on a shooting technique,
Display means for displaying an image represented by the image data subjected to the direction conversion processing by the conversion means together with a pointer pointing to an arbitrary position on the image;
Marker changing means for changing the direction of marker data representing a marker to be provided on the image represented by the image data, based on the information relating to the photographing technique;
Pointer changing means for changing the shape of the pointer to the shape of the marker represented by the changed marker data;
Position changing means for changing the position of the marker on the image based on the pointer position change instruction;
An assigning means for giving the marker data to the image data based on an instruction to give the marker at a desired position on the image displayed on the display means ;
When the data value of the marker data and the data value of the image data in the vicinity of the marker data application position substantially match, the data value of the marker data and / or the image data in the vicinity of the marker data application position An image processing apparatus comprising data value changing means for changing the data value . The marker changing means is means for further changing the size of the marker data based on the size of the image represented by the image data and / or the reading density when the image data is obtained. The image processing method according to claim 10 . Storage means for storing marker data representing markers of a plurality of sizes prepared in advance;
Marker data representing a marker of a size suitable for the size of the image represented by the image data and / or the reading density when the image data is obtained from the marker data representing the markers of a plurality of sizes stored in the storage means And a selection means for selecting
The image processing apparatus according to claim 10 , wherein the marker changing unit is a unit that changes a direction of the selected marker data. In a computer-readable recording medium recording a program for causing a computer to execute an image processing method for performing a direction conversion process on image data based on information on a shooting technique,
The program determines a direction of the marker data and a position to which the marker data is applied based on information related to the photographing technique when the marker represented by the marker data is added to the image represented by the image data. Procedure and
A step of assigning the marker data to the image data based on the determined direction and the assigned position ;
When the data value of the marker data and the data value of the image data in the vicinity of the marker data application position substantially match, the data value of the marker data and / or the image data in the vicinity of the marker data application position A computer-readable recording medium characterized by comprising: 14. The computer according to claim 13 , further comprising a step of changing the size of the marker data based on the size of the image represented by the image data and / or the reading density when the image data is obtained. A readable recording medium. Selects marker data representing markers of a size suitable for the size of the image represented by the image data and / or the reading density when the image data is obtained from marker data representing markers of a plurality of sizes prepared in advance Further comprising the steps of:
The computer-readable recording medium according to claim 13 , wherein the determining step is a step of determining a direction and a given position of the selected marker data. In a computer-readable recording medium recording a program for causing a computer to execute an image processing method for performing a direction conversion process on image data based on information on a shooting technique,
When the program gives a marker represented by marker data on an image represented by the image data,
A procedure for performing the direction changing process on the image data;
A procedure for displaying an image represented by the image data subjected to the direction conversion processing on a display unit together with a pointer indicating an arbitrary position on the image;
A procedure for changing the direction of the marker data based on information on the imaging technique,
A procedure for changing the shape of the pointer to the shape of the marker represented by the changed marker data;
A procedure for changing the position of the marker on the image based on the pointer position change instruction;
A step of giving the marker data to the image data based on an instruction to give the marker at a desired position on the image displayed on the display means ;
When the data value of the marker data and the data value of the image data in the vicinity of the marker data application position substantially match, the data value of the marker data and / or the image data in the vicinity of the marker data application position A computer-readable recording medium characterized by comprising: The computer according to claim 16 , further comprising a step of changing the size of the marker data based on the size of the image represented by the image data and / or the reading density when the image data is obtained. A readable recording medium. Selects marker data representing markers of a size suitable for the size of the image represented by the image data and / or the reading density when the image data is obtained from marker data representing markers of a plurality of sizes prepared in advance Further comprising the steps of:
The computer-readable recording medium according to claim 16 , wherein the procedure of changing the direction of the marker data is a procedure of changing the direction of the selected marker data.

Images