JP5572020B2 - Radiation image processing apparatus and method, and program - Google Patents

Description

  The present invention relates to a radiation image processing apparatus and method for performing image processing on a radiation image such as a breast image, and a radiation image processing program.

  In recent years, in order to promote early detection of breast cancer, image diagnosis using a radiographic imaging apparatus (called mammography) for imaging a breast has attracted attention. A radiation image (breast image) of a breast imaged by mammography is subjected to image processing by a dedicated operation terminal, and then transmitted to a server or a browsing terminal via a network. The doctor examines the presence or absence of a lesion such as a tumor or calcification by projecting and interpreting the breast image transmitted to the viewing terminal.

  Here, the above-described image processing is performed in order to facilitate interpretation of a breast image. Specifically, in image processing, image characteristics such as density, contrast, gradation, dynamic range, frequency characteristics, and noise of the region to be interpreted are appropriate, and a breast image having a desired image quality is obtained. As described above, the breast image is analyzed to determine the image processing condition, and the breast image is subjected to image processing based on the determined image processing condition.

  Various techniques for performing image processing suitable for such breast images have been proposed. For example, a technique has been proposed in which a breast area is detected from a breast image, a pectoral muscle area is detected from the breast area, and the density of the breast area is adjusted based on the average density of the pectoral muscle area (see Patent Document 1). . Also proposed is a method of extracting a mammary gland region from a breast image, setting multiple local regions centered on the mammary gland region, calculating the contrast of the local region, and performing image processing on the breast image based on the calculated contrast (See Patent Document 2).

JP 2010-017370 A JP 2009-247521 A

  By the way, when an abnormality such as a lesion is found when making a diagnosis using a breast image, in order to perform a more detailed interpretation, a spot image for photographing only the lesion part and an enlarged image of the lesion part are photographed. In many cases, additional photographing such as enlargement photographing and special photographing such as photographing for biopsy (biological tissue diagnosis) are performed. In the following description, shooting other than special shooting performed before special shooting is referred to as normal shooting. An image acquired by such special imaging (referred to as a special image) may use a compression plate different from normal imaging, may enlarge a specific area, or may include only a partial tissue. . For this reason, if image processing conditions are set using only images acquired by special imaging and image processing is performed, the appearance of the processed image is the appearance of the breast image acquired by normal imaging (referred to as a normal image) Will be different. If the appearance of the image is different in this way, the appearance of the abnormal part included in the normal image and the special image is also different, and thus the diagnosis cannot be performed with high accuracy.

  The present invention has been made in view of the above circumstances, and an object thereof is to perform image processing appropriate for a special image.

A radiographic image processing apparatus according to the present invention includes an image processing unit that performs image processing on a breast image based on predetermined image processing conditions;
Determining means for determining whether the breast image is acquired by the first imaging or whether the breast image is acquired by the second imaging different from the first imaging performed after the imaging of the first imaging; With
When the breast image is a second breast image acquired by the second imaging, the image processing means sets the first breast image set for the first breast image acquired by the first imaging. It is means for performing image processing on the second breast image using image processing conditions.

  As the second imaging, spot imaging for imaging only the lesion part, which is performed when an abnormality such as a lesion is found in the first breast image acquired by the first imaging, and imaging by enlarging the lesion part are performed. Additional photographing such as enlarged photographing, and special photographing such as photographing for biopsy (biological tissue diagnosis). Note that even when a breast including an implant such as silicon is imaged by breast reconstruction surgery or breast augmentation, the image quality is greatly different from an image acquired by imaging (normal imaging) a breast without an implant due to the presence of the implant. Therefore, special imaging includes imaging of the breast including the implant in addition to spot imaging, magnification imaging, and biopsy.

  Here, if the second shooting is special shooting, the first shooting is other than special shooting, and shooting other than the special shooting is normal shooting.

  The “predetermined image processing conditions” include various parameters for improving the image quality of the breast image. Specifically, parameters for changing the tone, contrast, density, frequency characteristics, noise characteristics, etc. of the image are set. Can be used.

  “Using the first image processing condition” means that when the image processing condition is composed of a plurality of parameters, not only the case where all the parameters are set as the first image processing condition, but only a part of the first image processing condition is used. The image processing conditions are included.

  The radiological image processing apparatus according to the present invention may further include a storage unit that stores the first breast image together with the first image processing condition.

  In the radiological image processing apparatus according to the present invention, the image processing means may set a second image processing condition for the second breast image when the image processing condition includes a plurality of parameters, and It is determined which of the plurality of parameters included in the first image processing condition and the second image processing condition is to be used, and the second breast image is determined based on the image processing condition including the determined parameter. It is good also as a means to perform image processing.

In the radiographic image processing method according to the present invention, when performing image processing on a breast image based on a predetermined image processing condition, whether the breast image is acquired by the first imaging or the imaging of the first imaging It is determined whether the image was acquired by a second shooting different from the first shooting performed later,
When the breast image is the second breast image acquired by the second imaging, the first image processing condition set for the first breast image acquired by the first imaging is used. The image processing is performed on the second breast image.

  The radiographic image processing method according to the present invention may be provided as a program for causing a computer to execute the method.

  According to the present invention, when the breast image is the second breast image acquired by the second imaging, the first image processing condition set for the first breast image acquired by the first imaging Is used to perform image processing on the second breast image. For this reason, the first breast image and the second breast image that have been subjected to image processing can have the same appearance, and thereby, the abnormal portion included in the first breast image and the second breast image. The appearance of can be the same. Therefore, diagnosis using the first and second breast images can be performed with high accuracy.

  When the image processing condition includes a plurality of parameters, the second image processing condition for the second breast image is set, and any one of the plurality of parameters included in the first and second image processing conditions is set. By determining whether to use the parameters of the image processing conditions and performing image processing on the second breast image according to the image processing conditions including the determined parameters, it is possible to perform image processing so as to have more preferable image quality. .

  In addition, it is determined whether or not the dynamic range of the second breast image is within a predetermined range. If this determination is negative, the second breast image is determined according to the dynamic range processing parameters in the first image processing condition. By performing image processing on the second breast image, when the dynamic range of the second breast image is not appropriate, the second breast image can be subjected to image processing so as to have an appropriate dynamic range.

Schematic block diagram showing the configuration of a system including a radiation image processing apparatus according to the present embodiment Schematic showing the configuration of the mammography device Internal configuration diagram of imaging stand in mammography apparatus Schematic block diagram showing functions of an image processing program performed by the radiation image processing apparatus A flowchart showing processing performed in the present embodiment

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic block diagram showing the configuration of a system including a radiation image processing apparatus according to the present embodiment. As shown in FIG. 1, this system includes a radiographic image processing apparatus 10 according to the present invention, a mammography imaging apparatus 40 installed in a medical facility, an operation console 42 for operating the mammography imaging apparatus 40, and the mammography imaging. It comprises an image database (image DB) 44 for storing breast images taken by the device 40 and a doctor's terminal device 46 for interpretation, having a high-definition monitor (not shown).

  The radiographic image processing apparatus 10 is configured by a computer such as a workstation, and mainly stores a central processing unit (CPU) 12 that controls the operation of each component, and a control program for the apparatus, and works when the program is executed. A main memory 14 serving as a region, a graphic board 16 for controlling display of a monitor device 28 such as a liquid crystal display or a CRT display, a communication interface (communication I / F) 18 connected to a network 50 of a medical facility, and the present invention A hard disk device 20 that stores various application software including a radiographic image processing program, a CD-ROM drive 22, a keyboard controller 24 that detects key operations of the keyboard 30 and outputs them to the CPU 12 as instruction inputs, and position input Mau as a device And it is configured to detect the 32 states of the signal state of the position or the mouse 32 of the mouse pointer on the monitor device 28 from the mouse controller 26 for output to the CPU 12.

  FIG. 2 is a schematic diagram showing the configuration of the mammography photographing apparatus 40. As shown in FIG. As shown in FIG. 2, the mammography imaging apparatus 40 includes a base 112 that is installed in an upright state, an arm member 116 that is fixed to a turning shaft 114 that is disposed at a substantially central portion of the base 112, and a subject. 118 X-ray sources for exposing radiation (X-rays) to 118 breasts are stored, an X-ray source storage unit 120 fixed to one end of the arm member 116, and X-rays transmitted through the breasts are detected. A detector for storing X-ray image information is housed, and an imaging table 122 fixed to the other end of the arm member 116, and a compression plate 124 for pressing the breast against the imaging table 122 are provided.

  The arm member 116 to which the X-ray source storage unit 120, the imaging table 122, and the compression plate 124 are connected is configured to be adjustable in the imaging direction with respect to the breast of the subject 118 by rotating in the direction of arrow A about the rotation axis 114. Is done. The compression plate 124 is disposed between the X-ray source storage unit 120 and the imaging table 122 while being connected to the arm member 116, and is configured to be displaceable in the arrow B direction.

  The X-ray source storage unit 120 is provided with a face guard sheet 128 made of a member that blocks X-rays in order to protect the vicinity of the face of the subject 118 from X-ray exposure. Further, on the base 112, imaging information such as the imaging region and imaging direction of the subject 118, ID information of the subject 118, and the like are displayed, and the compressed state of the breast by the compression plate 124 is released as necessary. A display 130 is provided for displaying information relating to the remaining compression time.

  FIG. 3 is an internal configuration diagram of the imaging stand 122 in the mammography imaging apparatus 40, and shows a state in which a breast 136 that is an imaging site of the subject 118 is disposed between the imaging stand 122 and the compression plate 124. Reference numeral 138 indicates the chest wall of the subject 118.

  The X-ray image information based on the X-rays transmitted through the breast 136 is accumulated in the imaging table 122, and the detector 140 that outputs the information as an electrical signal, and the X-ray image information accumulated and recorded in the detector 140 are read. In addition, a reading light source unit 142 for irradiating the detector 140 with reading light and a dose detection for detecting an X-ray dose transmitted through the breast 136 in order to determine an exposure time which is one of the X-ray exposure conditions. In order to remove unnecessary charges accumulated in the detector 140 (hereinafter referred to as an “AEC (Automatic Exposure Control) sensor 144”) and an automatic exposure control X-ray detector. And an erasing light source unit 146 for irradiating.

  The detector 140 is an X-ray detector of direct conversion type and optical readout type, and accumulates X-ray image information based on X-rays transmitted through the breast 136 as an electrostatic latent image and reads from the reading light source unit 142. By scanning with light, a current corresponding to the electrostatic latent image is generated.

  The reading light source unit 142 includes, for example, a line light source configured by arranging a plurality of LED chips in a line and an optical system that linearly irradiates the reading light output from the line light source onto the detector 140, and detects the light source. The detector 140 is moved by moving the line light source in which the LED chips are arranged in the direction orthogonal to the extending direction of the linear electrode, which is the second conductive layer of the detector 140, in the extending direction (arrow C direction) of the linear electrode. Are exposed and scanned.

  The AEC sensor 144 is configured to be movable in the direction of arrow C along the detector 140 so that the X-ray dose can be detected by moving the AEC sensor 144 to a portion corresponding to a portion of the breast 136 where the breast density is high. The erasing light source unit 146 can be configured by two-dimensionally arranging LED chips that emit and extinguish light in a short time and have very little afterglow.

  X-rays transmitted through the breast 136 are detected as X-ray image information by the detector 140, and an X-ray image (breast image) of the breast 136 is formed by an X-ray image forming unit (not shown). On the other hand, the detector 140 from which the X-ray image information has been read is irradiated with erasing light from the erasing light source unit 146, thereby erasing the remaining X-ray image information.

  When mammography of the subject 118 is performed, the subject 118 is positioned and the operator console 42 (FIG. 1) is operated for imaging. The console 42 includes input means for inputting subject identification information (subject ID) for identifying a subject and a photographer ID for identifying a photographer. The subject ID and photographer ID input here are input. Are associated with the breast image photographed by the mammography photographing apparatus 40 and stored in the image DB 44.

  The breast image can be stored in the image DB 44 as, for example, a DICOM (Digital Image and Communication in Medicine) standard image file (DICOM file). In this case, the subject ID and imaging are included in the header of the DICOM file. In addition to the person ID, information such as the shooting date and the shooting facility is recorded.

  The detector 140 is not limited to a direct conversion type and optical readout type X-ray detector, but may be an imaging plate (storable phosphor sheet) IP having a stimulable phosphor, A flat panel X-ray detector (flat panel detector) FPD in which a very large number of X-ray detection elements using a semiconductor or the like are two-dimensionally arranged on the X-ray detection surface may be used.

  Next, the positioning and imaging procedures of the subject 118 will be described. The photographer (radiologist) sets the mammography apparatus 40 in a predetermined state according to the designated imaging method. For example, as the imaging direction of the breast 136, head-to-tail (CC) imaging in which radiation X is irradiated from above, lateral (ML) imaging in which radiation X is irradiated from the side, and oblique direction There is an inside / outside oblique (MLO) imaging in which imaging is performed by irradiating with radiation X, and the arm member 116 is pivoted about the pivot axis 114 in accordance with these imaging directions. FIG. 2 shows a case where head-to-tail (CC) imaging is performed.

  After the above preparatory work is completed, the subject 118 is guided to the mammography apparatus 40 and positioning of the breast 136 is started. That is, after placing the breast 136 on the imaging table 122, the radiologist turns on a compression plate moving switch (not shown) and moves the compression plate 124 in the direction of arrow B (FIG. 2) with respect to the imaging table 122. The breast 136 is gradually compressed.

  When it is detected by a pressure sensor (not shown) that the compression pressure has reached the pressure required for photographing, the movement of the compression plate 124 is stopped and a photographing permission is output. Therefore, when the radiation engineer turns on an exposure switch (not shown), radiation imaging of the breast 136 is performed.

  When the mammography is completed, the compression of the breast 136 is released by moving the compression plate 124 away from the imaging table 122. In imaging of the breast 136, a single subject 118 is subjected to multiple imaging such as CC imaging, ML imaging, and MLO imaging of the left and right breasts 136.

  A breast image is acquired by performing imaging in this manner, and a final breast image is acquired by performing image processing on the acquired breast image as described later. Then, when the doctor diagnoses the breast image displayed on the terminal device 46 and an abnormality such as a lesion is found, in order to perform a more detailed interpretation, spot imaging for capturing only the lesion portion and a lesion portion are performed. Additional photography such as enlargement photography that expands or special photography such as photography for biopsy (biological tissue diagnosis) is performed.

  Next, image processing performed by the radiation image processing apparatus 10 will be described. FIG. 4 is a schematic block diagram showing functions of an image processing program executed by the radiation image processing apparatus 10. As shown in FIG. 4, the function of the image processing program performed by the radiation image processing apparatus 10 is executed by the determination unit 200 and the image processing unit 202. In the following description, a breast image acquired by special imaging is referred to as a special breast image, and a breast image acquired by past imaging (normal imaging) before performing special imaging is referred to as a normal breast image.

  The determination unit 200 determines whether a breast image to be subjected to image processing is acquired by normal imaging or acquired by special imaging. Note that since the type of radiographer's radiography is input from the keyboard 30 at the time of imaging, the determination unit 200 acquires a breast image to be subjected to image processing based on information input from the keyboard 30 by normal imaging. It is determined whether it has been acquired or acquired by special shooting. Here, when performing special imaging, the compression plate is often replaced, so the replacement of the compression plate is detected by a sensor (not shown), and using this detection result, the breast image to be subjected to image processing is You may make it determine whether it is a normal breast image or a special breast image.

  First, the image processing unit 202 divides a breast image into a breast region and a missing region using, for example, a method described in JP-A-2005-65855. Since the background missing region exhibits a particularly high density on the image, the peak appearing on the high density side in the density histogram of the entire image corresponds to the background missing region. The image processing unit 202 divides the breast image into a breast region and a missing region by performing binarization processing using a value obtained by subtracting a certain value from the peak value as a threshold value. Alternatively, a search may be performed from the high density side in the density histogram, and binarization processing may be performed using a point that first becomes a predetermined value or less as a threshold value.

  Then, the image processing unit 202 analyzes the breast image, calculates pixel values and contrast values in the breast region, and sets image processing conditions for image processing to be performed on the breast image. For example, histogram analysis is performed using only pixels in the breast region or pixels having a mammary gland content in the breast region equal to or greater than a predetermined threshold value, and image processing conditions are set. Note that. The image processing condition is set by determining the gradation shift amount so that the calculated pixel value of the breast region becomes a predetermined value, or by determining the gradient of the gradation according to the calculated contrast value (level). Key parameters). Other parameters such as a density parameter that determines the brightness of the entire breast image, a frequency processing parameter that sets a frequency processing condition, and a noise removal parameter that sets a noise removal condition are set. Further, the intensity of the dynamic range compression process is set as a dynamic range parameter so that overexposure and underexposure do not occur in pixel values in the breast region. The image processing unit 202 performs image processing on the breast image according to an image processing condition including various parameters that have been set, and generates a processed image.

  The image processing unit 202 transmits the processed breast image to the image DB 44 together with the image processing conditions set. As a result, the breast DB and the image processing conditions are stored in the image DB 44 in association with each other. The image processing condition may be recorded in the header of the DICOM file of the breast image.

  Here, when the determination result by the determination unit 200 is normal imaging, the image processing unit 202 sets image processing conditions based on the normal breast image and performs image processing on the normal breast image as described above. On the other hand, when the determination result by the determination unit 200 is special imaging, the determination unit 200 accesses the image DB 44, reads out the image processing conditions stored together with the past normal captured images of the same patient, and reads the read image Image processing is performed on a special breast image acquired by special imaging according to processing conditions. When a plurality of normal breast images for the same patient are stored in the image DB 44, the image processing conditions for the normal breast images acquired by the latest normal imaging are read out.

  Here, the image processing condition includes a plurality of parameters such as gradation, density, contrast, dynamic range, frequency processing, and noise as described above. Here, when image processing is performed on a special breast image according to image processing conditions set based on a normal breast image, some of the parameters are set based on the special breast image. In some cases, the image quality is preferable. For example, since the correction amount of the center density depends on the dose at the time of imaging, more preferable image quality can be obtained by using only this parameter and the image processing conditions set based on the special breast image. Therefore, when the determination result by the determination unit 200 is special imaging, the image processing unit 202 uses the image processing conditions (hereinafter referred to as normal image processing conditions) set using the normal breast image as described above as the image DB 44. The image processing conditions for the special breast image (hereinafter referred to as special image processing conditions), and the parameters of the special image processing conditions are used only for some of the parameters included in the image processing conditions. As other parameters, parameters of normal image processing conditions may be used. In this case, it is preferable to determine in advance which one of the parameters of the normal breast image and the special breast image is to be used. As for the image processing conditions for special breast images, only those relating to predetermined parameters may be obtained.

  The CPU 12 functions as the determination unit 200 and the image processing unit 202 of the radiation image processing apparatus 10 by executing the image processing program.

  Next, processing performed in the present embodiment will be described. FIG. 5 is a flowchart showing processing performed in the present embodiment. When the breast imaging is completed and the breast image is acquired, the CPU 12 starts processing, and determines whether or not the imaging for acquiring the breast image is normal imaging (step ST1). If the determination in step ST1 is affirmative, imaging is normal imaging, so the CPU 12 sets image processing conditions using the acquired normal breast image (step ST2), and the normal breast image is set according to the set image processing conditions. Image processing is performed to generate a processed normal breast image (step ST3), the processed breast image is transmitted to the image DB 44 together with the image processing conditions (step ST4), and the process ends.

  On the other hand, if step ST1 is negative, since the imaging is special imaging, the CPU 12 accesses the image DB 44 and acquires normal image processing conditions stored in association with the normal breast image for the same patient. (Step ST5). Then, using the acquired normal image processing conditions, image processing is performed on the special breast image to generate a processed special breast image (step ST6), and the processed breast image is transmitted to the image DB 44 (step ST7). The process is terminated.

  Thereafter, in accordance with an instruction from the terminal device 46, the normal breast image and the special breast image stored in the image DB 44 are transmitted to the terminal device 46 and used for interpretation by a doctor.

  As described above, in the present embodiment, when the breast image is a special breast image acquired by special imaging, a special image processing condition set for the normal breast image acquired by normal imaging is used. Image processing is performed on the breast image. For this reason, it is possible to make the normal breast image and the captured breast image that have undergone image processing look the same, thereby making the abnormal part of the normal breast image and the special breast image look the same. Can do. Therefore, the diagnosis using the normal breast image and the special breast image can be performed with high accuracy.

  In the above embodiment, spot imaging, additional imaging, and imaging for biopsy are listed as special imaging, but when imaging a breast including an implant such as silicon by breast reconstruction surgery or breast augmentation surgery, The image quality of the acquired breast image varies greatly depending on the presence or absence of the implant. In particular, since the implant appears as a high-luminance region in the breast image, the brightness of the breast image varies greatly depending on the presence or absence of the implant. In this case, when the image processing condition is set based on the breast image including the implant, the image processing condition is affected by the region of the implant, and the image processing condition may not be set so as to obtain a preferable image quality.

  Therefore, special imaging includes spot imaging, enlargement imaging, and biopsy, as well as imaging of breasts including implants. When imaging breasts including implants, imaging is usually performed using image processing conditions for breast images. It is preferable to perform image processing on the breast image acquired by the above. In this case, whether or not the breast including the implant is to be imaged may be determined based on an input by the radiologist using the keyboard 30. Further, when the area of the high-luminance region in the breast image acquired by imaging is equal to or larger than the threshold value, it may be determined that the imaging is imaging of the breast including the implant. In this case, a breast image and image processing conditions acquired by imaging performed before inserting the implant may be used as the normal breast image and normal image processing conditions. Thereby, it is possible to perform image processing on a breast image including an implant without being affected by the presence of the implant.

  The present invention is not limited to the above examples, and it goes without saying that various improvements and modifications may be made without departing from the scope of the present invention.

10 radiation image processing device 12 central processing unit (CPU)
14 Main Memory 18 Communication Interface 20 Hard Disk Device 28 Monitor Device 30 Keyboard 32 Mouse 40 Mammography Camera 44 Image DB
200 determination unit 202 image processing unit

Claims (8)

Image processing means for performing image processing on a breast image based on predetermined image processing conditions;
Determining means for determining whether the breast image is acquired by the first imaging or whether the breast image is acquired by the second imaging different from the first imaging performed after the imaging of the first imaging; With
When the breast image is a second breast image acquired by the second imaging, the image processing means sets the first breast image set for the first breast image acquired by the first imaging. A radiographic image processing apparatus, comprising means for performing image processing on the second breast image using image processing conditions. Image processing means for performing image processing on a breast image based on predetermined image processing conditions;
Determining means for determining whether the breast image is acquired by the first imaging or whether the breast image is acquired by the second imaging different from the first imaging performed after the imaging of the first imaging; With
When the image processing condition includes a plurality of parameters and the breast image is a second breast image acquired by the second imaging, a second processing unit for the second breast image is provided . An image processing condition is set, and it is determined which of the plurality of parameters included in the first and second image processing conditions is to be used, and image processing including the determined parameters A radiographic image processing apparatus, which is means for performing image processing on the second breast image depending on conditions . The first shooting is normal photography, a radiation image processing apparatus according to claim 1 or 2, wherein said second imaging is a special shooting. Said first breast image, the radiographic image processing apparatus according to any one of claims 1 to 3, further comprising a storage means for storing together with the first image processing conditions. When performing image processing on a breast image based on predetermined image processing conditions, whether the breast image was acquired by the first imaging or the first imaging performed after the imaging of the first imaging To determine whether it was acquired by a second shooting different from
When the breast image is a second breast image acquired by the second imaging, the first image processing conditions set for the first breast image acquired by the first imaging, the A radiation image processing method, wherein image processing is performed on a second breast image. When performing image processing on a breast image based on predetermined image processing conditions, whether the breast image was acquired by the first imaging or the first imaging performed after the imaging of the first imaging To determine whether it was acquired by a second shooting different from
When the image processing condition includes a plurality of parameters and the breast image is a second breast image acquired by the second imaging, a second image processing condition for the second breast image is set. Determining which image processing condition parameter is to be used among the plurality of parameters included in the first and second image processing conditions, and determining the second image processing condition based on the image processing conditions including the determined parameters . A radiographic image processing method comprising performing image processing on a breast image of When performing image processing on a breast image based on predetermined image processing conditions, whether the breast image was acquired by the first imaging or the first imaging performed after the imaging of the first imaging A procedure for determining whether the image was acquired by a second shooting different from
When the breast image is a second breast image acquired by the second imaging, the first image processing conditions set for the first breast image acquired by the first imaging, the A radiation image processing program for causing a computer to execute a procedure for performing image processing on a second breast image. When performing image processing on a breast image based on predetermined image processing conditions, whether the breast image was acquired by the first imaging or the first imaging performed after the imaging of the first imaging A procedure for determining whether the image was acquired by a second shooting different from
When the image processing condition includes a plurality of parameters and the breast image is a second breast image acquired by the second imaging, a second image processing condition for the second breast image is set. Determining which image processing condition parameter is to be used among the plurality of parameters included in the first and second image processing conditions, and determining the second image processing condition based on the image processing conditions including the determined parameters . A radiation image processing program for causing a computer to execute a procedure for performing image processing on a breast image of

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