JP6925846B2 - Exposure dose calculation device and exposure dose management system, their control methods and their programs - Google Patents

Description

The present invention relates to an exposure dose calculation device and an exposure dose management system, and a control method thereof and a program thereof.

In medical image diagnosis taken using an X-ray CT device or the like, the exposure dose value (CTDIvol: Volume Computed Tomography Dose Index) received at the time of CT imaging is generally used as an index for controlling the exposure dose of the subject. Is. In such an X-ray CT apparatus, a detector is attached to a cylindrical reference phantom made of acrylic resin (hereinafter, also referred to as CTDI phantom) at the time of shipment to detect the X-ray dose, and the initial initial stage for each apparatus is based on the detection result. The settings are being made. Therefore, CTDIvol can be output as ancillary information of medical image data as a value according to imaging conditions such as X-ray tube current at the time of CT imaging, and CTDIvol can be used as an evaluation index of the exposure dose of a subject.

There are two types of CTDI phantoms used for the initial setting of the device, one for the body with a diameter of 32 cm and the other for the head with a diameter of 16 cm, taking into account the size of the test site of the subject. The reference value acquired based on the phantom is stored, and the CTDI vol calculated based on the reference value according to the examination site is output as incidental information of the medical image data.

The CTDIvol output as incidental information of medical image data in this way can be used as an evaluation index of the exposure dose of the subject, but it does not strictly consider the body shape of the subject and depends on the body shape of the subject. There was a need for a mechanism to calculate the radiation dose.

As a method capable of calculating the exposure dose in consideration of such a body shape, Patent Document 1 describes a scan image (for example, AP scan image: AP SCAN PROGECTION IMAGE) scanned while the subject is lying on a bed. A method of obtaining a body shape of a sample and correcting CTDIvol to a value corresponding to the body shape is disclosed.

Japanese Unexamined Patent Publication No. 2004-73397

However, in Patent Document 1, since the body shape of the subject is obtained by image analysis, it may be difficult to identify the body shape depending on the position and material of the bed at the time of imaging, the X-ray dose, and other imaging conditions. .. Therefore, there is a possibility that an erroneous value of the exposure dose will be calculated due to an erroneous calculation of the body shape information of the subject. On the other hand, the technique described in Patent Document 1 does not consider this problem at all. Therefore, when calculating the exposure dose, it is preferable that the user can confirm after the fact whether or not the body shape of the subject is appropriately identified by image analysis.

Therefore, the present invention has been made in view of the above problems, and it is possible to easily confirm whether or not the body shape information of the subject used for calculating the exposure dose is appropriately specified in the exposure dose management system. The purpose is to provide a mechanism.

In order to achieve the above object, the radiation dose management system of the present invention is managed by a management means for managing examination information including a medical image acquired by photographing a subject with an X-ray apparatus and the management means. Specific means for specifying the body shape information of the subject in order to calculate the exposure dose based on the medical image included in the test information, and the medical image used for specifying the body shape information of the subject and the specific means. It is characterized by having a display control means that superimposes identification information indicating an area corresponding to the body shape information and displays it on the display unit.

In the radiation dose management system, provide a mechanism that can easily confirm whether or not the body shape information of the subject used for calculating the radiation dose has been properly specified.

It is a figure which shows an example of the system configuration of the exposure dose management system. It is a figure which shows an example of the hardware composition of the medical image display device (information processing device) 102, and the server device 103, 104. It is a flowchart for demonstrating the flow of calculating the exposure dose according to the physique of a subject. This is an example of the initial screen of the medical image display device. This is an example of the radiation dose management screen. This is an example of the radiation dose management screen. It is a figure explaining the process of generating a latham image (AP direction). It is a figure explaining the process of generating a Latham image (Lateral direction). This is a correction table showing correction coefficients for the body width and thickness of the subject, which is used when correcting the exposure dose according to the body shape of the subject. It is a flowchart for demonstrating the flow of displaying an exposure dose graph. This is a list screen that displays the patient's exposure dose. This is an example of an exposure dose graph. This is an example of an exposure dose graph. This is an example of displaying an image used to identify the body shape information of a subject. This is a list screen that displays the radiation dose calculation results. It is a flowchart for demonstrating the flow of displaying the image used for specifying the exposure dose and the body shape information of a subject.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a diagram showing a system configuration of an exposure dose management system according to the present embodiment.

In the radiation dose management system of the present invention, a modality 101 such as an X-ray CT device, a medical image display device 102 (exposure dose calculation device), and an in-hospital image management server 103 (server device) are included in a LAN (Local Area Network) or WAN. (Wide Area Network) and other in-hospital networks are connected to each other so that data can be communicated with each other. Further, the in-hospital network can be connected to the out-of-hospital image management server 104 (exposure dose management device) via a network so that data can be communicated with each other, and in-hospital images and the like can be stored outside the hospital.

It should be noted that each terminal configuration shown in FIG. 1 is an example, and it goes without saying that there are various configuration examples depending on the application and purpose.

Hereinafter, in the present embodiment, an X-ray CT apparatus will be described as an example as a modality, but the present invention is not limited to this, and any modality that requires dose control can be applied.

The X-ray CT device 101 can transmit and store the captured medical image to the preset medical image display device 102, the in-hospital image management server 103, or the external image management server 104. The medical image data (DICOM image data) taken by the X-ray CT apparatus 101 and transmitted to the server includes the patient name, the patient ID, the gender of the patient, and the value of the X-ray tube current when taken by the X-ray CT apparatus. It is composed of incidental information such as CTDIvol (dose information) indicating the X-ray intensity at the time of medical image taking and image data.

The medical image display device 102 is a workstation capable of performing various image processing based on the medical image data (plurality of tomographic image data) captured by the X-ray CT device 101. In the present embodiment, the medical image display device 102 generates a latham image in which a plurality of tomographic images taken by the X-ray CT device 101 are viewed from a predetermined direction, and an index of the body shape of the subject is generated on the latham image. Obtain the values of the body width and / or body width to be obtained, obtain the correction value from the correction value table using the value according to the body type of the subject, and use the CTDIvol provided in the incidental information of the DICOM image data. By making corrections, the exposure dose that reflects the body shape of the subject is calculated.

The image management server 103 is a server device for storing and managing images mainly taken by the modality in the hospital, and is a medical image transmitted from the modality or an image processed by the medical image display device 102. Medical images can also be saved. By accessing the image management server 103 from an information processing device (not shown) in the hospital, the medical image in the image management server 103 can be viewed from a desired location.

The image management server 103 is a server device provided outside the hospital and capable of storing and managing medical images taken from the modality in the hospital, medical images processed by the medical image display device 102, and the like. .. The image management server 103 can also receive storage requests from a plurality of hospitals and manage the radiation dose of the plurality of hospitals.

FIG. 2 is a diagram showing an example of the hardware configuration of the medical image display device 102, the image management server 103, and the image management server 104.

The CPU 201 comprehensively controls each device and controller connected to the system bus 204.

Further, the ROM 202 or the external memory 211 (storage means) includes a BIOS (Basic Input / Output System) which is a control program of the CPU 201, an operating system program (hereinafter, OS), a medical image display device 102, an image management server 103, and an image. Various programs and the like, which will be described later, necessary for realizing the function executed by the management server 104 are stored. The RAM 203 functions as a main memory, a work area, and the like of the CPU 201.

The CPU 201 realizes various operations by loading a program or the like necessary for executing a process into the RAM 203 and executing the program.

Further, the input controller 205 controls the input from the input device 209 such as a pointing device such as a keyboard or a mouse (not shown).

The video controller 206 controls the display on a display such as the display 210. The type of display is assumed to be a CRT or a liquid crystal display, but is not limited to this.

The memory controller 207 is a card-type memory connected to a hard disk, a flexible disk, or a PCMCIA card slot for storing boot programs, browser software, various applications, font data, user files, edit files, various data, etc. via an adapter. Controls access to the external memory 211 such as.

The communication I / F controller (communication I / FC) 208 connects and communicates with an external device via a network, and executes communication control processing on the network. For example, Internet communication using TCP / IP is possible.

The CPU 201 enables display on the display 210 by, for example, executing an outline font expansion (rasterization) process in the display information area in the RAM 203.
Further, the CPU 201 enables a user instruction with a mouse cursor or the like (not shown) on the display 210.

Various programs and the like used by each terminal of the present invention to execute various processes described later are recorded in the external memory 211, and are executed by the CPU 201 by being loaded into the RAM 203 as needed.

Further, the definition file and various information tables used by the program according to the present invention are stored in the external memory 211. Next, the flow of calculating the exposure dose reflecting the body shape of the subject will be described using FIGS. 3 to 9. do.

FIG. 3 is a flowchart showing a process performed by the medical image display device 102 according to the embodiment of the present invention. The process shown in the flowchart of FIG. 3 is realized by reading and executing the control program stored in the CPU 201. FIG. 4 is an example of the initial screen of the image processing program of the medical image display device 102. FIG. 5 is an example of an initial screen of the dose management screen 500 displayed on the medical image display device 102. FIG. 6 is an example of a state in which the exposure dose reflecting the body shape of the subject is calculated on the dose management screen 500 displayed on the medical image display device 102. FIG. 7 is a diagram for explaining a Latham image in the anteroposterior direction of the subject. FIG. 8 is a diagram for explaining a latham image in the left-right direction of the subject. FIG. 9 shows a correction coefficient 903 used when correcting the CTDIvol in order to correspond to the body shape of the subject stored in advance in the storage means of the medical image display device 102, and body shape information (body width + body thickness) of the subject. It is a table showing the relationship between 901, body thickness 911, body width 921) and effective diameter 912. 9 (a) to 9 (c) show the correction coefficient used when correcting the CTDIvol calculated based on the initial value acquired by the 16 cm phantom according to the body shape, the body shape information of the subject, and the effective diameter. It is a table showing. Then, FIGS. 9 (d) to 9 (f) show the correction coefficient used when correcting the CTDIvol calculated based on the initial value acquired by the 32 cm phantom according to the body shape, the body shape information of the subject, and the effective diameter. It is a table showing.

In S301 of FIG. 3, the CPU 201 of the medical image display device 102 determines whether the dose management tool has been activated, and if it is determined that the dose management tool has been activated, the process proceeds to S302.

Specifically, it can be determined whether or not the dose management button 446 is pressed on the initial screen of the medical image processing program mounted on the medical image display device 102 shown in FIG.

The initial screen of the medical image display device 102 of FIG. 4 can be displayed in the medical image display device 102 or by image management by pressing the search button 405 with the patient name 401, patient ID 402, examination date 406, calendar 407, and the like selected. The medical images stored in the servers 103 and 104 can be searched.

As for the searched information, the information acquired from the incidental information of the medical image data such as the patient name 411, the patient ID 412, the gender 413, the latest date and time 414, the modality 415, the age 416, the state 417, and the comment 418 is displayed as the list screen 410. Will be done.

When the user selects a desired patient on the list screen 410, the examination information such as the attribute 421 of the patient, the examination date 422, the modality 423, the examination description 424, the patient name 425, and the examination ID 426 are displayed on the examination information list screen 420. Will be done. Then, when the user selects desired inspection information on the inspection information list screen 420, the series No. of the inspection information is displayed on the series information list screen 430. Series information such as 431, pixel size 432, FOV433, inspection date and time 434, modality 435, slice thickness 436, and number of images 437 are displayed. When any series information is selected, thumbnails and the like of images of the series can be displayed in the display area 440.

Further, the user may select a plurality of tomographic images taken by, for example, the X-ray CT apparatus 101 in a state where the desired series information is selected on the series information list screen 430 (or one image in the series is selected). 3D drawing button 441 for 3D display, viewer button 442 for viewing tomographic images, printer transfer button 443, report registration button 444 for registering reports, and saved selected images on image management servers 103 and 104. It is possible to give an instruction to perform each desired process such as an external save button 445 for performing the dose calculation process and a dose control button 446 for performing the dose calculation process. It is also possible to select a desired medical image after pressing the button for starting each desired process.

In S302, the CPU 201 of the medical image display device 102 reads the medical image data (DICOM image data) selected by the user. If a series is selected before the dose control button 446 is pressed, the medical image data of the selected series is read. On the other hand, if it is not selected, the medical image data can be read by pressing the DICOM image reading button 511 on the exposure dose management screen of FIG. 5 and selecting the medical image data for which the exposure dose is to be calculated.

In S303, the CPU 201 of the medical image display device 102 acquires dose information (CTDIvol) and the like from the medical image data acquired in S302. Specifically, when the DICOM image data is read, the subject parameter 512 for performing the dose calculation, the CTDIvol of the CT dose index 514, and the parameter for the dose calculation shown in the dose management screen 500 of FIG. 5 from the incidental information of the DICOM data. 515 etc. are read. (Fig. 6)
In S304, the CPU 201 of the medical image display device 102 displays the dose management screen 500 shown in FIG. 5, and receives the designation of the calculation processing method and other inputs from the user through this screen.

In S305, the CPU 201 of the medical image display device 102 determines which method is used to calculate the body shape of the subject specified by the user.

Specifically, the calculation processing method is specified by the user selecting the calculation method of the body shape of the subject on the dose management screen of FIG. The body shape information of the subject can be acquired from a Latham image generated based on a plurality of medical images (tomographic images) acquired as DICOM image data. As the body shape, the user uses the body width acquired from the AP image (image in the anteroposterior direction) of the subject (AP diameter) or the body thickness acquired from the lateral image (image in the left-right direction) (Lateral diameter). ), Whether to use both the body width and the body thickness (Lateral + AP imager) can be selected in the selection field 523.

Further, the user can also select the setting of the user selection item 513, the phantom size of the exposure dose calculation parameter 518, and the like on the dose management screen. If the phantom size and the like can be obtained from the incidental information of the DICOM data, the contents of the DICOM data are reflected.

If the dose information (CTDIvol) cannot be obtained from the incidental information of the DICOM data, the user can input it on the dose management screen as appropriate.

When it is determined in S305 that the body width obtained from the AP image is used as the body shape information of the subject (selected by AP diameter), the process proceeds to S306, and the CPU 201 of the medical image display device 102 selects a latham image from the plurality of medical images. It is generated and displayed in the display area 516.

For example, in the X-ray CT apparatus 101, an image is taken with the subject lying on the bed 701 as shown in FIG. 7 (a), and a plurality of tomographic images as shown in FIG. 7 (b) are taken. The Latham image is an image generated based on the value obtained by integrating the CT values of the plurality of tomographic images (or volume images) along a predetermined direction. FIG. 7C shows an example of an AP image generated along the direction (AP direction) from the front surface to the rear surface of the subject. The Latham image thus generated is displayed in the display area 516 of the dose management screen 500.

In S307, the CPU 201 of the medical image display device 102 acquires the body width information of the subject specified by the Latham image generated in S306. As an acquisition method, the width of the subject at the center position in the body axis direction of the region examined by the X-ray CT apparatus can be automatically acquired from the Latham image. Further, it is also possible to accept the designation of two points from the user for the Latham image as displayed in the display area 516 of FIG. 6 (611), and acquire the distance between the two points as the body width information.

In S308, the CPU 201 of the medical image display device 102 acquires the phantom size. As for the phantom size, if there is data in the incidental information of the DICOM data, the data can be referred to. On the other hand, when there is no phantom size data in the incidental information of the DICOM data, the one set by the user via the exposure dose calculation parameter 518 of the dose management screen 500 is acquired.

Then, in S308, the CPU 201 of the medical image display device 102 identifies the table to be used based on the body width information acquired in S307 and the phantom size acquired in S308, and further acquires the correction coefficient from the table. do.

In S318, the CPU 201 of the medical image display device 102 corrects (integrates) the dose information (CTDIvol) acquired in S303 using the correction coefficient acquired in S308, and the exposure dose corrected according to the body shape of the subject. Is calculated.

In S319, the CPU 201 of the medical image display device 102 stores the Latham image generated in S306, the exposure dose calculated in S318, and the like in the storage means. Such a storage process can be automatically performed after the exposure dose is calculated, but it may be stored when the user presses the data storage button 522 on the dose management screen 500.

Further, the storage means to be stored may be the storage means in the medical image display device 102 or may be stored in the database 1040 on the image management server 104 outside the hospital.

Next, in the flow of S304 to S309, S318 and S319, the AP diameter is selected (601) in the selection field 523 of FIG. The width information will be specifically described based on an example in which 32 cm is used as the phantom.

When "20.6 cm" is acquired as the distance (body width information) between two points of the Latham image displayed in the display area 516, the information is displayed in the column 602 of the dose management screen 500. NS. In the display area 517, a medical image of the surface from which the body width information has been acquired is displayed.

Then, FIG. 9F, which is a correction table corresponding to the AP image of the 32 cm phantom, is specified from the storage means of the medical image display device 102, and the correction coefficient “20.6 cm” corresponding to “20.6 cm” is specified based on the correction table. Obtain 1.48 ”and the effective coefficient“ 25 ”. Even if it is not provided in the correction table, a necessary correction coefficient can be appropriately obtained based on the correction coefficients corresponding to two adjacent body widths. Then, the acquired correction coefficient "1.48" is displayed in the conversion coefficient column 519, and the effective coefficient "25" is displayed in the effective coefficient column.

When the CTDIvol acquired from the incidental information of the DICOM data is "8.9216" as shown in the CT dose index column 603 of FIG. 6, the correction coefficient "1.48" and the CTDIvol "8.9216" Is integrated, and "13.204" is calculated as the exposure dose according to the body width.

The two points that can be selected in the display area 516 of FIG. 6 show an example of selection at the center position in the body axis direction of the Latham image in the present embodiment, but are acquired at any position in the Z axis direction of the Latham image. You may. In that case, the exposure dose according to the body shape can be calculated based on the body width (body shape) acquired at this time.

By pressing the data save button 522 in such a state, the correction coefficient “1.48” and the exposure dose “13.204” are saved together with the subject information acquired from the DICOM image.

In addition, as shown in this example, by accepting a desired designated site from the user on the Latham image and calculating the exposure dose according to the body shape of the corresponding subject, the exposure dose to the imaging position including the desired organ can be obtained. It can even be calculated easily.

The explanation will be continued by returning to FIG. If it is determined in S305 of FIG. 3 that the body thickness obtained from the lateral image is used as the body shape information of the subject (when the lateral diameter is selected), the process proceeds to S310. In S310, the CPU 201 of the medical image display device 102 generates a latham image from a plurality of medical images and displays it in the display area 516. In this case, as shown in FIG. 8A, the lateral image (FIG. 8B) obtained by integrating the CT values along the direction from the left side to the right side (lateral direction) of the subject is the dose control. It is displayed in the display area 516 of the screen 500.

In S311 the CPU 201 of the medical image display device 102 acquires the body thickness information of the subject specified by the Latham image generated in S310. As an acquisition method, it may be automatically acquired from the Latham image, or two points are specified by the user for the Latham image as displayed in the display area 516 of FIG. 6 (611), and the distance between the two points is received. It is also possible to acquire the distance of as body thickness information.

In S312, the CPU 201 of the medical image display device 102 acquires the phantom size. The phantom size can be referred to when there is data in the incidental information of DICOM data, and when there is no data in the incidental information of DICOM data, the user can use the exposure dose calculation parameter of the dose management screen 500. What is set via 518 is acquired.

Then, in S313, the CPU 201 of the medical image display device 102 identifies the table to be used based on the body thickness information acquired in S311 and the phantom size acquired in S312, and further acquires the correction coefficient from the table. do.

In S318, the CPU 201 of the medical image display device 102 corrects (integrates) the dose information (CTDIvol) acquired in S303 using the correction coefficient acquired in S313, and the exposure dose corrected according to the body shape of the subject. Is calculated.

In S319, the CPU 201 of the medical image display device 102 stores the Latham image generated in S310, the exposure dose calculated in S318, and the like in the storage means. Such a storage process can be automatically performed after the exposure dose is calculated, but it may be stored when the user presses the data storage button 522 on the dose management screen 500.

As described above, even when the body shape information of the subject is obtained using the lateral direction Latham image, the exposure dose can be calculated in the same manner as when the body shape information of the subject is obtained using the AP direction Latham image.

If it is determined in S305 that the body width and body thickness obtained from the AP image and the lateral image are used as the body shape information of the subject (when Lateral + AP diameter is selected), the process proceeds to S314.

In S314, similarly to S306 and S310, the CPU 201 of the medical image display device 102 generates two latham images in the AP direction and the lateral direction from the plurality of medical images and displays them in the display area 516.

In S315, similarly to S307 and S311 the CPU 201 of the medical image display device 102 acquires the body width and body thickness information of the subject specified by the Latham image generated in S314.

In S316, similarly to S308 and S312, the CPU 201 of the medical image display device 102 acquires the phantom size.

In S317, similarly to S309 and S313, the CPU 201 of the medical image display device 102 identifies the table to be used based on the body width and body thickness information acquired in S315 and the phantom size acquired in S316. Further, the correction coefficient is obtained from the table.

In S318, the CPU 201 of the medical image display device 102 corrects (integrates) the dose information (CTDIvol) acquired in S303 using the correction coefficient acquired in S317, and the exposure dose corrected according to the body shape of the subject. Is calculated.

In S319, the CPU 201 of the medical image display device 102 stores the Latham image generated in S314, the exposure dose calculated in S318, and the like in the storage means. Such a storage process can be automatically performed after the exposure dose is calculated, but it may be stored when the user presses the data storage button 522 on the dose management screen 500. The storage destination is not limited to the medical image display device 102, and can be stored in the in-hospital image management server 103 or the out-of-hospital image management server 104.

As described above with reference to FIGS. 3 to 9, in the present embodiment, at least one of the body width and the body thickness of the subject specified by using the Latham image generated from a plurality of medical images is the subject information. CTDIvol, which is the X-ray intensity at the time of medical image taking, is corrected by using the correction coefficient specified by using.

In the present embodiment, by acquiring the body shape using the Latham image, the actual body shape of the subject is reflected as compared with the case where the body shape of the subject is used from the scanned image taken without rotating the gantry as in the conventional case. It can be said that the value can be calculated and the highly reliable exposure dose can be obtained.

Further, as in the present embodiment, by acquiring the body width and body thickness of the subject from the Latham image, it is possible to reduce the trouble of selecting the position to acquire the subject information from a plurality of medical images, which is convenient. It can be said that the exposure dose is obtained according to the body shape of the subject.

In the present embodiment, the generation of the Latham image from a plurality of medical images (tomographic images) and the calculation of the exposure dose have been described as a series of flows, but even if the series of flows is not used, the Latham image and the X-ray at the time of taking the medical image are described in advance. If the representative value of CTDIvol, which is the intensity, is stored, the body type and the representative CTDIvol can be obtained at a desired timing, and the exposure dose according to the body type can be calculated. Specifically, after generating one of the Latham images, the data save button 522 is pressed without designating two points 611. As a result, it is stored as a representative value of CTDIvol (for example, DICOM image data in the center of the imaging area), which is the X-ray intensity at the time of taking a Latham image or a medical image, without calculating the exposure dose according to the body shape of the subject. CTDIvol) is memorized. By saving the Latham image in this way, the user acquires the body shape information of the subject from the Latham image at a desired timing, and the exposure dose corrected according to the body shape, which is a typical value at the time of medical image taking. Can be obtained. As a result, the exposure dose can be calculated as appropriate without storing multiple medical images in order to calculate the exposure dose. Therefore, the exposure dose according to the body shape of the subject at a desired timing while reducing the capacity of the image management server. Can be calculated.

Next, with reference to FIGS. 10 to 13, a mechanism for managing the exposure dose according to the body shape of the subject will be described. The exposure dose calculated as shown in S319 of FIG. 3 can be managed by the medical image display device 102, the in-hospital image management server 103, or the out-of-hospital image management server 104. The exposure dose managed by such a management means can be referred to as a list, for example, from the medical image display device 102, an information processing device (not shown), or the like. Then, based on this list information, a list and an exposure dose management graph can be generated by referring to the information in which the exposure dose is managed by the management means.

Here, the exposure dose management graph generated in response to the graph generation instruction from the medical image display device 102 is displayed based on the exposure dose corresponding to a plurality of subjects managed by the image management server 104 outside the hospital. The explanation will be given using an example.

FIG. 10 is a flowchart for explaining a series of steps for displaying the exposure dose graph. The process shown in the flowchart of FIG. 10 is realized by reading and executing the control program stored in the CPU 201 of the medical image display device 102 and the CPU 201 of the image management server 104. FIG. 11 is a list of the exposure doses of a plurality of subjects (patients) managed by the image management server 104, which is generated by the image management server 104 in response to the request of the medical image display device 102 and is generated by the medical image display device. It is a list screen displayed in 102. Through this screen, the user can instruct the display of the exposure dose graph. 12 and 13 are examples of the exposure dose management graphs displayed in this way.

In S1001 of FIG. 10, the CPU 201 of the medical image display device 102 requests the image management server 104 to display a list image.

In S1002, the CPU 201 of the image management server 104 responds to a display request of the medical image display device 102, and based on a plurality of X-ray CT examination information managed in the image management server 104, a latham image, an exposure dose, etc. Generate a list screen that allows you to grasp the management information of. At the same time, in S1003, the display screen 1101 including the list screen and the condition field 1130 for setting the graph display condition is transmitted to the medical image display device 102.

In S1004, the CPU 201 of the medical image display device 102 displays the display screen 1101 transmitted from the image management server 104 on the display.

An example of such a display screen 1101 is shown in FIG. As can be seen from the display screen 1101 shown in FIG. 11, in the image management server 104, the selection box 1102 and the control number 1103, the examination date 1104 acquired from the DICOM data, the patient ID 1105, the patient name 1106, the gender 1107, the age 1108, and the weight 1109. , The imaging site 1110 is managed. Further, the number of images 1111 indicating the number of stored Latham images and the CTDIvol 1112 which is the X-ray intensity at the time of medical image taking (specified when the CTDIvol used when calculating the exposure dose or the data save button 522 is pressed. (Representative value of CTDIvol), DLP1113, and phantom size 1114 are managed. Further, the exposure dose 1115 calculated by correcting the CTDIvol according to the body shape of the subject, the effective diameter 1116 obtained from the correction table, the conversion coefficient 1117, and the like are managed.

On the list screen, the inspection information in which the data is registered after the exposure dose 1115 is calculated and the inspection information in which the data is registered in the state where the Latham image is generated but the exposure dose 1115 is not calculated can be distinguished. It is displayed. In the example of FIG. 11, the control number 1103 is No. 1 and No. 2 and No. 3 and No. Reference numeral 5 denotes test information in which data is registered after the exposure dose 1115 is calculated according to the body shape of the subject. And No. 4 and No. Reference numeral 6 denotes inspection information in which the data is registered in a state where the Latham image is generated but the exposure dose 1115 is not calculated. In this example, it is possible to determine which state it is in depending on whether or not a value such as an exposure dose of 1115 is included. By displaying it so that it can be judged on the list screen in this way, it is possible to easily confirm whether or not the exposure dose is calculated according to the body shape of the subject in the test information managed by the exposure dose management means. Can be done.

The new registration button 1118 on the display screen 1101 is a button for registering information such as a new patient's Latham image and the exposure dose 1115 without going through the dose management screen 500. The delete button 1119 on the display screen 1101 is a button that can delete the inspection information for which the selection box 1102 is selected. The download button 1120 on the display screen 1101 is a button for downloading information such as a late-sum image of the inspection information in which the selection box 1102 is selected and an exposure dose 1115 managed as a management item. The overwriting save button on the display screen 1101 is a button for overwriting the inspection information selected in the selection box 1102.

Here, the Latham image was generated, but the exposure dose of 1115 was not calculated. 4 or No. The case where it is desired to register the exposure dose according to the body type of the subject for the examination of 6 will be described. No. 4 or No. When the download button 1120 is pressed with 6 selected, the CPU 201 of the medical image display device 102 activates the dose management tool. Then, the corresponding Latham image stored in the management server 104 and the representative value of CTDIvol are acquired. Then, in the same manner as the flow of radiation dose calculation described with reference to FIGS. 3 to 9, at least one subject information of body width and body thickness is specified from the Latham image, and CTDIvol is corrected using the specified subject information. And calculate the exposure dose.

Then, by pressing the data save button 522 on the dose management screen 500, the calculated exposure dose can be overwritten and saved for the downloaded inspection information.

Further, the overwriting can be directly saved without performing the process of calculating by the medical image display device 102 in this way.
By saving the Latham image even if the plurality of tomographic images are not saved in this way, the exposure dose can be calculated at a desired timing, and the exposure dose can be further saved.

Returning to FIG. 10, the explanation of the graph generation process will be continued. In S1005, the CPU 201 of the medical image display device 102 determines whether the graph display button 1131 has been pressed by the user. When it is determined that the graph display button 1131 is pressed by the user, in S1006, the CPU 201 of the medical image display device 102 requests the image management server 104 to display the graph together with the condition of the condition column 1130 of the graph display condition. I do. Specifically, when the graph display button 1131 is pressed, a graph display request corresponding to the item checked in the condition column 1130 is made to the image management server 104.

In S1007, the CPU 201 of the medical image display device 102 generates a graph according to the conditions specified by the user. Specifically, prepare a graph template to be applied for each condition setting in advance, select the template according to the conditions set in the condition column 1130, and reflect the data managed as the exposure dose on the template. Generate a graph by doing.

In S1008, the CPU 201 of the image management server 104 transmits the graph generated in S1007 to the medical image display device 102.

In S1009, the CPU 201 of the medical image display device 102 displays the graph transmitted from the image management server 104, and ends.

Next, an example of the graph generated in this way will be specifically described. FIG. 12 shows a case where the graph display button 1131 is pressed in the condition column 1130 of FIG. 11 with the imaging site: chest, abdomen, gender: female, male, item: CTDIvol, and radiation dose selected. In this case, a template divided into chest and abdomen, female and male, and CTDIvol and radiation dose is selected, and a graph in which managed test information is plotted is displayed.

Further, in the condition column 1130 shown in FIG. 11, when the imaging site: chest is checked, the gender: female is checked, the item: CTDIvol is checked, and the percentile display is checked, the result is shown in FIG. 13 (a). A template like the one shown is selected and a graph with inspection information plotted is displayed.

Further, in the condition column 1130 shown in FIG. 11, when the imaging site: chest is checked, gender: male is checked, item: exposure dose is checked, and percentile display is checked, FIG. 13 (b). A template as shown in is selected and a graph with inspection information plotted is displayed.

In the condition column of FIG. 11, if any one of the items is not selected, the graph cannot be displayed. Therefore, if any one of the items is not selected, the graph display button 1131 is grayed out. You may not be able to select it.

By displaying a graph according to a desired condition based on the inspection information managed as described above, the user can grasp an index of an appropriate exposure dose.

Next, the body shape specific image will be described with reference to FIG. FIG. 14 is a diagram showing an example of a body shape specific image. FIG. 14A shows an example of displaying a body shape specific image when the body shape information is appropriately calculated. FIG. 14B shows an example of displaying the body shape specific image when the body shape specific image is not calculated appropriately. Here, the "body shape specific image" is an image in which it is possible to identify which region in the tomographic image or the latham image is used as the body shape information when the above-mentioned exposure dose is calculated. Here, the "identifiable display" includes a form in which identification information (contour information) for identifying the contour of a subject included in the image is superimposed and displayed on the tomographic image or the Latham image. Here, the form of superimposing the contour information includes a form of superimposing the contour information on the contour of the subject included in the tomographic image or the Latham image. The "contour information" includes at least a line or a frame for identifying the contour of the subject included in the image. Further, the contour information shows the result calculated by the CPU 201 of the medical image display device 102, and does not necessarily match the contour of the image.

The body shape information confirmation screen 1400 is a display screen displayed by the medical image display device 102. The body shape information confirmation screen 1400 is displayed and controlled by the CPU 201 of the medical image display device 102, and is displayed on a display such as a display 210 by the control. Here, the display in the present embodiment functions as a display unit.

The body shape information confirmation screen 1400 includes at least display information 1410 and 1420 indicating the contents of the displayed image and body shape specific images 1430 and 1450. The body shape information confirmation screen 1400 further includes a display item 1470 for closing the screen.

The body shape identification image 1430 is an image in which contour information 1440 that specifies body shape information is superimposed and displayed on a tomographic image. The contour information 1440 is displayed by showing a portion corresponding to the contour with a broken line in order to improve visibility.

The body shape specifying image 1450 is an image in which contour information 1460 for specifying body shape information is superimposed and displayed on the Latham image. The contour information 1460 shows the contour with a broken line and superimposes it in order to improve visibility.

The recalculation input receiving unit 1480 is a display item that receives a process of recalculating the exposure dose. When the recalculation input receiving unit 1480 is selected by the user, the CPU 201 of the medical image display device 102 recalculates the body shape information using the body shape specific image.

The edit input receiving unit 1490 is a display item for editing the position where the contour information 1440 is displayed.

Next, the difference between FIG. 14 (a) and FIG. 14 (b) will be described. In FIG. 14A, the contour of the tomographic image of the body shape specific image 1430 and the broken line of the contour information 1440 are superimposed and displayed. Therefore, the user can visually identify that the body shape information is correct by the body shape identification image 1430. In FIG. 14B, as shown by the region 1431, the two-dimensional position is partially deviated between the contour of the tomographic image of the body shape specific image 1430 and the broken line of the contour information 1440. The area 1431 is a frame displayed for convenience of explanation, and is not displayed on the body shape information confirmation screen 1400. The same applies to the body shape specific image 1450 and the contour information 1460.

Next, an operation when the user changes the display position of the contour information 1440 and recalculates will be described. The CPU 201 of the medical image display device 102 accepts a change in the display position of the contour information 1440 by a user operation. When the CPU 201 of the medical image display device 102 receives an input to the edit input receiving unit 1490, the CPU 201 determines the change in the display position. Therefore, the user can edit the position of the contour information 1440 when the contour information 1440 and the actual body shape specific image 1430 deviate from each other as shown in the area 1431 of FIG. 14B. .. Next, when the input to the recalculation input receiving unit 1480 is received by the user's operation, the body shape information is recalculated according to the position of the edited contour information 1440. The edited body shape information value is updated and managed by the image management server 104.

In this way, the body shape information confirmation screen 1400 can appropriately calculate the body shape information by displaying the contour information 1460 in two types of images having different directions, such as the body shape specific image 1430 and the body shape specific image 1450. You can easily identify the missing part. The body shape information confirmation screen 1400 may display a body shape specific image in only one direction (one type).

From the above, it is possible to discriminately display whether or not the body shape information used for the calculation of the exposure dose is properly calculated.

Next, the list screen 1500 will be described with reference to FIG. The display screen 1500 in FIG. 15 is displayed and controlled by the CPU 201 of the medical image display device 102, and the screen transmitted from the image management server 104 is displayed on a display such as a display 210 by the control. The list screen 1500 is a screen displaying a list of each information after calculating the exposure dose shown in the flowchart of FIG. The list screen 1500 displays a list of the results calculated by a plurality of calculation processes.

The list screen 1500 includes at least patient information 1510, an exposure dose determination result 1520, and an exposure dose calculation result 1553, and is displayed in a state in which these are associated with each other.

The patient information 1510 is information for identifying a patient, and is information included in DICOM data of a medical image. The patient information 1510 is not limited to the content shown in FIG. 15, and may include various information to be displayed on the display screens 1104 to 1117. Further, the patient information 1510 is a medical image examination or a patient as one unit, and includes a plurality of series images. The series image is data consisting of one or more image data in one inspection.

The exposure dose determination result 1520 is information that can be identified whether or not at least one of the dose index 1552 and the exposure dose calculation result 1553 is larger than the reference value. Here, the dose index 1552 is a CTDIvol output as incidental information of DICOM data in a medical image in the present embodiment. Here, as the reference value in the dose index 1552, the value of DRL (Diagnostic Reference Level), which is an index of the diagnostic reference level, may be applied. DRL is a value used as a reference value for diagnosis, and is a reference value set using an easily measured and highly reproducible dose scale for a patient or standard phantom of a standard physique, and the dose limit is set. It is not defined. The reference value of the exposure dose calculation result 1553 may be based on the DRL like the reference value in the dose index 1552, or may be a value arbitrarily set by the user based on the statistical data. By making it possible to identify the exposure dose determination result 1520 in the patient information unit on the list screen 1500, the user can easily identify the patient with a high exposure dose. Further, the list screen 1500 displays a display item 1521 for indicating whether or not it is larger than the reference value in each display column of the exposure dose determination result 1520. The display item 1521, for example, indicates that it is larger than the reference value (“x” in FIG. 15), but is not limited to this.

The display item 1530 has a function of changing whether or not to display the exposure dose according to the operation of the user. Specifically, when the display item 1530 is selected based on the user's operation, the displayability of the exposure dose display area 1540 is switched between each other. Further, each time the display item 1530 is selected, the display state of the display item 1530 is changed according to the display state of the exposure dose.

The exposure dose display area 1540 is an area for displaying the exposure dose corresponding to the patient information 1510. In the display area 1540, the series image information 1551, the dose index 1552, and the exposure dose calculation result 1553 are displayed. The exposure dose display area 1540 further includes a display item 1560 for displaying a body shape specific image. Specifically, when the display item 1560 is selected based on the user's operation, the body shape information confirmation screen 1400 is displayed. The display item 1560 may be displayed on a screen different from the list screen 1500. The display area 1540 displays the information 1550 including the series image information 1551, the dose index 1552, and the exposure dose calculation result 1553 in a different area for each series. In the present embodiment, the series 1 and the series 2 are displayed as one unit of the information 1550 on the list screen 1500.

Here, the exposure dose calculation result 1553 includes the result of calculating the exposure dose by a plurality of calculation methods for one series image included in the same inspection information. Here, the method 1 and the method 2 displayed as the exposure dose calculation result 1553 differ from each other in the calculation method of the exposure dose. Here, when the calculation method is different, for example, the case where the method for specifying the body shape information is different may be included. The CPU 201 of the medical image display device 102 identifies the contour of the subject from the Latham image as one of the methods for specifying the body shape information, and obtains the body axis in the specified contour or the major axis in the direction perpendicular to the body axis. .. Further, the CPU 201 of the medical image display device 102 identifies the cross section of the subject from the Latham image as another method of specifying the body shape information, and calculates the body shape information based on the area (cross-sectional area) of the specified cross section. More specifically, the CPU 201 of the medical image display device 102 calculates the major axis from the cross-sectional area assuming that the cross section is a perfect circle. The exposure dose calculation result 1553 in Series 1 shows a case where the difference between a plurality of exposure doses is small. On the other hand, the exposure dose calculation result 1553 in Series 2 shows the case where the difference between the plurality of exposure doses is large.

Next, the display control process of the exposure dose calculation result 1553 by the CPU 201 of the medical image display device 102 will be described. The CPU 201 of the medical image display device 102 controls so that a plurality of exposure doses calculated by a plurality of calculation methods are displayed on the display in a manner that can be compared with each other. A mode that can be compared with each other includes a mode in which the same series of images are displayed in parallel in the vertical or horizontal direction in the display area of the same series image in the display area 1540. By displaying the exposure dose calculated by the plurality of calculation methods in this way, the user can appropriately refer to the value according to the purpose. That is, when referring to the exposure dose calculated by one method as in the conventional case, it is difficult for the user to confirm whether or not the value is an appropriate value. However, as described above, by displaying the exposure dose calculated by the plurality of calculation methods on the same screen, the user can easily judge the validity of the exposure dose value. Further, when the user refers to the exposure dose calculated by one method as in the conventional case, if the exposure dose is erroneously calculated, the user does not have to perform the operation of performing the exposure dose again by another method. It becomes possible to refer to the appropriate exposure dose. In addition, the CPU 201 of the medical image display device 102 can identify the correspondence between the plurality of exposure doses calculated by the plurality of calculation methods and the names of the plurality of calculation methods, and the exposure calculated by the plurality of calculation methods. Display the dose on the display. In FIG. 15, as an example, “Method 1”, which is the name of a plurality of calculation methods, and “30 mGy”, which is a plurality of exposure doses, are displayed in the region of the exposure dose calculation result 1553 and in a nearby region. Correspondence can be identified. As a result, the user can easily judge the validity of the value of the exposure dose for each method.

Further, the CPU 201 of the medical image display device 102 can compare the dose information included in the incidental information of the DICOM data in the medical image used for calculating the exposure dose with the exposure dose calculated by a plurality of calculation methods. Display on the display with. In FIG. 15, as an example, the CPU 201 of the medical image display device 102 displays the dose index 1552 and the exposure dose calculation result 1553 in parallel in units of series 1 and 2. As a result, the user can easily judge the validity of the exposure dose value for each method and the validity of the dose index 1552 by comparing the dose index 1552 and the exposure dose calculation result 1553 with each other. Can be done.

Next, the display control process of the warning 1554 by the CPU 201 of the medical image display device 102 will be described. The CPU 201 of the medical image display device 102 can display the warning 1554 when the value of the exposure dose calculated by the plurality of calculation methods is larger than the threshold value. The CPU 201 of the medical image display device 102 may also determine whether or not the dose index 1552 is larger than the threshold value and display a warning. That is, the CPU 201 of the medical image display device 102 displays a display item (warning 1554) on the display when the difference between the absolute values of the plurality of exposure doses calculated by the plurality of calculation methods is larger than the preset threshold value. Control to do. On the other hand, the CPU 201 of the medical image display device 102 displays a display item (warning 1554) when the difference between the absolute values of the plurality of exposure doses calculated by the plurality of calculation methods is smaller than the preset threshold value. Control so that it is not displayed on the display. As a result, the user can easily determine whether or not the calculated exposure dose exceeds the preset threshold value of the exposure dose. Then, when the difference is large, the user can determine whether or not the setting of the body shape information of the plurality of methods or one of them is appropriate. The CPU 201 of the medical image display device 102 controls to automatically display the body shape information confirmation screen 1400 regardless of the user's operation when the value of the exposure dose calculated by a plurality of calculation methods is larger than the threshold value. You may. Further, the CPU 201 of the medical image display device 102 can be invalidated by selecting from a plurality of exposure doses calculated by a plurality of calculation methods. More specifically, the CPU 201 of the medical image display device 102 can be excluded from the selected statistical processing of the exposure dose calculation result 1553 when generating the graphs shown in FIGS. 12 and 13. The user can improve the accuracy of the graph generation process by not adding the apparently erroneously calculated exposure dose to the statistical process.

Next, with reference to FIG. 16, a series of flows for displaying the exposure dose and the body shape specific image will be described. The process shown in the flowchart of FIG. 16 is realized by reading and executing the control program stored by the CPU 201 of the medical image display device 102 and the CPU 201 of the image management server 104.

In S1601 of FIG. 16, the CPU 201 of the medical image display device 102 requests the image management server 104 to display the list screen.

In S1602, the CPU 201 of the image management server 104 responds to the display request of the medical image display device 102, and based on a plurality of inspection information of the X-ray CT managed in the image management server 104, the latham image and the exposure. A list screen 1500 that can grasp management information such as dose is generated. At the same time, the list screen 1500 is transmitted to the medical image display device 102 in S1603.

In S1604, the CPU 201 of the medical image display device 102 displays the list screen 1500 transmitted from the image management server 104 on the display.

In S1605, the CPU 201 of the medical image display device 102 determines whether the display item 1530 has been pressed by the user. When it is determined that the display item 1530 has been pressed by the user, the CPU 201 of the medical image display device 102 makes a display request for the exposure dose display area 1540 in S1606. Specifically, when the display item 1530 is pressed, the display request of the display area 1540 corresponding to the corresponding patient information 1510 is transmitted to the image management server 104. As described with reference to FIG. 15, the display area 1540 is an area in which detailed information on the exposure dose is displayed.

In S1607, the CPU 201 of the medical image display device 102 generates a display area 1540 according to the conditions specified by the user. Specifically, a template for displaying the exposure dose calculation result 1553 for each series is prepared in advance in the display area 1540, and various data such as the managed exposure dose are reflected on the template to display the display area. Generate an image to be displayed as 1540.

In S1608, the CPU 201 of the image management server 104 transmits the image of the display area 1540 generated in S1607 to the medical image display device 102.

In S1609, the CPU 201 of the medical image display device 102 displays the image of the display area 1540 transmitted from the image management server 104.

In S1610, the CPU 201 of the medical image display device 102 determines whether the display item 1560 has been pressed by the user. When the determination is made, in S1611, the CPU 201 of the medical image display device 102 makes a display request for the body shape information confirmation screen 1400. Specifically, when the display item 1560 is pressed, the display request of the body shape information confirmation screen 1400 of the corresponding series is transmitted to the image management server 104.

In S1612, the CPU 201 of the medical image display device 102 generates the body shape specifying screens 1430 and 1450 according to the conditions specified by the user. Specifically, a template for displaying the body shape identification screens 1430 and 1450 for each series on the type information confirmation screen 1400 is prepared in advance, and the managed body shape identification images 1430 and 1450 are reflected on the template. Generates an image to be displayed as the type information confirmation screen 1400.

In S1613, the CPU 201 of the image management server 104 transmits the image of the body shape information confirmation screen 1400 generated in S1612 to the medical image display device 102.

In S1614, the CPU 201 of the medical image display device 102 displays the image of the body shape information confirmation screen 1400 transmitted from the image management server 104, and ends a series of processes.

By the above processing, it becomes possible to provide a mechanism capable of easily comparing the exposure doses calculated by a plurality of calculation methods in the exposure dose management system.

Through the above processing, it is possible to easily confirm whether or not the body shape information of the subject used for calculating the exposure dose has been appropriately specified in the exposure dose management system.

In the above-described embodiment, the CPU 201 of the medical image display device 102 functions as a specific means, a calculation means, and a display control means, and the image management server 104 functions as a management means in the radiation dose management system. .. In the above-described embodiment, each function may be executed by either the medical image display device 102 or the image management server 104. Further, the functions of the specific means, the calculation means, and the display control means are different from those of the CPU 201 of the medical image display device 102. The present invention can also be an embodiment as a system, a device, a method, a program, a storage medium, or the like. Specifically, it may be applied to a system composed of a plurality of devices, or may be applied to a device composed of one device.

The present invention includes a software program that realizes the functions of the above-described embodiments, which is directly or remotely supplied to the system or device. The present invention also includes a case where the information processing device of the system or the device is also achieved by reading and executing the supplied program code.

Therefore, in order to realize the functional processing of the present invention in the information processing device, the program code itself installed in the information processing device also realizes the present invention. That is, the present invention also includes a computer program itself for realizing the functional processing of the present invention.

In that case, as long as it has a program function, it may be in the form of an object code, a program executed by an interpreter, script data supplied to the OS, or the like.

Recording media for supplying programs include, for example, flexible disks, hard disks, optical disks, magneto-optical disks, MOs, CD-ROMs, CD-Rs, CD-RWs, and the like. There are also magnetic tapes, non-volatile memory cards, ROMs, DVDs (DVD-ROM, DVD-R) and the like.

In addition, as a program supply method, a browser of a client computer is used to connect to an Internet homepage. Then, the computer program itself of the present invention or a compressed file including the automatic installation function can be supplied from the homepage by downloading it to a recording medium such as a hard disk.

It can also be realized by dividing the program code constituting the program of the present invention into a plurality of files and downloading each file from different homepages. That is, the present invention also includes a WWW server that allows a plurality of users to download a program file for realizing the functional processing of the present invention in the information processing apparatus.

In addition, the program of the present invention is encrypted, stored in a storage medium such as a CD-ROM, distributed to users, and the key information for decrypting the encryption is downloaded from the homepage to the user who clears the predetermined conditions. Let me. Then, by using the downloaded key information, it is also possible to execute an encrypted program and install it in the information processing device.

Further, the function of the above-described embodiment is realized by the information processing apparatus executing the read program. In addition, based on the instruction of the program, the OS or the like running on the information processing device performs a part or all of the actual processing, and the function of the above-described embodiment can be realized by the processing.

Further, the program read from the recording medium is written to the memory provided in the function expansion board inserted in the information processing device and the function expansion unit connected to the information processing device. After that, based on the instruction of the program, the function expansion board, the CPU provided in the function expansion unit, or the like performs a part or all of the actual processing, and the function of the above-described embodiment is also realized by the processing.

It should be noted that the above-described embodiments merely show examples of embodiment in carrying out the present invention, and the technical scope of the present invention should not be construed in a limited manner by these. That is, the present invention can be implemented in various forms without departing from the technical idea or its main features.

101 Modality 102 Medical image display device 103 Image management server 104 Image management server

Claims (7)

A management means for managing examination information including medical images obtained by photographing a subject with an X-ray device, and
A specific means for identifying the body shape information of the subject in order to calculate the exposure dose based on the medical image included in the test information managed by the control means, and
The medical image used to identify the body shape information of the subject and the information included in the identification information indicating the region corresponding to the body shape information specified by the specific means, and the medical image used to identify the body shape information. A display control means for displaying the contour of the subject contained in the image on the display unit by superimposing the contour information that can be identified.
An exposure dose management system characterized by having. The management means manages the medical images included in the examination information for each series image.
The exposure dose management system according to claim 1, wherein the specific means specifies body shape information of the subject in a series image managed by the management means. The exposure dose management system according to claim 2, wherein the specific means specifies body shape information of the subject for each series image managed by the management means. The specific means can identify the body shape information of the subject by a plurality of methods.
The exposure according to any one of claims 1 to 3 , wherein the display control means displays the contour information different from each other on the display unit depending on the method for identifying the body shape information of the subject. Dose management system. A management means for managing examination information including medical images obtained by photographing a subject with an X-ray device, and
A specific means for identifying the body shape information of the subject in order to calculate the exposure dose based on the medical image included in the test information managed by the control means, and
Wherein A information included in the identification information indicating a region corresponding to the type information identified by the medical image and the specific means used for a particular subject type information, the medical image used in particular of the type information A display control means for displaying the contour of the included subject on the display unit by superimposing the contour information that can be identified.
An exposure dose calculation device characterized by having. A management process that manages test information including medical images obtained by photographing a subject with an X-ray device, and
A specific step of identifying the body shape information of the subject in order to calculate the exposure dose based on the medical image included in the test information managed in the control step, and
Wherein A information included in the identification information indicating a region corresponding to the type information identified by the identifying step and the medical image used for a particular subject type information, the medical image used in particular of the type information A display control step of superimposing and displaying the contour of the included subject with identifiable contour information on the display unit, and
A method of controlling an exposure dose management system, which comprises having. A program for operating a computer as each means of the radiation dose management system according to any one of claims 1 to 4.

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