Radiography control apparatus and radiography system

Abstract

To solve the problem that the result of consistency determination is not stable in the middle of positioning or the like which is accompanied by a movement of an engineer or a subject though it becomes possible to prevent an imaging failure or to make a workflow efficient by determining consistency between designated imaging procedures and actual subject positioning by analyzing an optical image.SOLUTION: A radiography control apparatus includes: a first acquisition unit for acquiring a plurality of optical images acquired at different timings on a subject for which radiography is performed; an optical image analysis unit for analyzing each of a plurality of optical images of at least some optical images of a plurality of optical images; a result management unit for managing information related to an analysis result of each of the plurality of optical images analyzed by the optical image analysis unit as history information; and a notification content determination unit for determining contents to be notified to a user and whether or not the contents should be output to notification means.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to a radiation imaging control device and a radiation imaging system.

Background Art

[0002] In recent years, in radiation imaging for medical examinations, imaging support using an optical image has been performed, in which an optical image of the imaging site is taken to obtain an optical image, and additional information obtained by analyzing the optical image is provided to an operator together with a live image. For example, in Patent Document 1, a mechanism is provided that can perform efficient radiation imaging independent of the skill and experience of a technician by determining the imaging position of a subject from an optical image and outputting information regarding the suitability of the imaging position.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the technique described in Patent Document 1, there is room for improvement in determining the suitability of the imaging position.

Means for Solving the Problems

[0005] The present invention for solving the above problems is a radiation imaging control device, comprising: a first acquisition unit that acquires a plurality of optical images acquired at different timings with respect to a subject to be radiographed; an optical image analysis unit that analyzes a plurality of at least some of the plurality of optical images respectively; a result management unit that manages, as history information, information related to the analysis results of the plurality of optical images analyzed by the optical image analysis unit; and a notification content determination unit that determines the content to be notified to a user based on the history information and whether to output the content to a notification means.

Advantages of the Invention

[0006] According to the present invention, when determining the imaging position of a subject and outputting information regarding the suitability of the imaging position, it is possible to reduce the display of unnecessary determination results.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Figure 4

Mode for Carrying Out the Invention

[0008] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Note that the following embodiments do not limit the invention according to the claims, and not all combinations of the features described in the present embodiments are essential for the solution of the invention.

[0009] [First Embodiment] With reference to FIGS. 1 to 4, the configuration and operation of a radiation imaging control apparatus and a radiation imaging system according to an embodiment of the present invention will be described.

[0010] FIG. 1 is a diagram showing a configuration example of a radiation imaging system according to the first embodiment. The radiation imaging system 1 includes at least a control apparatus 100 and a radiation detection apparatus 130. In FIG. 1, as other preferable forms, a radiation generation apparatus 120, an optical imaging apparatus 140, a display apparatus 150 (hereinafter, also referred to as a display unit 150 or a notification unit in some cases), and an operation unit 160 are provided. Hereinafter, they will be described in order. The control apparatus 100 is a radiation imaging control apparatus, and controls radiation imaging using the radiation detection apparatus 130 and the radiation generation apparatus 120.

[0011] The radiation detection device 130 detects the radiation that has been irradiated from the radiation generation device 120 and passed through a subject (not shown), and outputs image data corresponding to the radiation. Note that the image data can also be referred to as medical images or radiation images. Specifically, the radiation detection device 130 detects the radiation that has passed through the subject as electric charges corresponding to the amount of transmitted radiation. For example, the radiation detection device 130 uses a direct conversion type sensor such as a-Se that directly converts radiation into electric charges, or an indirect type sensor that uses a scintillator such as CsI that converts radiation into visible light and a photoelectric conversion element such as a-Si. Further, the radiation detection device 130 generates image data by performing A / D conversion on the detected electric charges, and outputs the image data to the control device 100.

[0012] The control device 100 is connected to the radiation detection device 130, for example, via a wired or wireless network or a dedicated line. The radiation detection device 130 images the radiation generated by the radiation generation device 120 and outputs the image data to the control device 100. The control device 100 has an application function that operates on a computer. That is, the control device 100 has one or more processors and a memory, and realizes each functional unit described below by the processor executing a program stored in the memory. However, some or all of each functional unit may be realized by dedicated hardware.

[0013] The control device 100 controls the timing at which the radiation generator 120 generates radiation and the imaging conditions of the radiation based on the inspection information received by the operation unit 160. Thus, the control device 100 is a control device that controls radiation imaging, and controls the operation of the radiation detection device 130 and the operation of the radiation generator 120. Therefore, in the following, the control device 100 may also be referred to as a radiation imaging control device. The radiation image acquisition unit 101 controls the timing at which the radiation detection device 130 captures image data and the timing at which it outputs the data, and receives the generated image data. The image processing unit 102 performs image processing on the received image data, and the image display control unit 104 displays the processed image on the display unit 150 which is a notification means. A graphical user interface using the display unit 150 is provided, and instructions from the operator are received by the operation unit 160. Inspection information is selected based on the received input, and the information is managed by the inspection information management unit 107.

[0014] The control device 100 controls the conditions, timing, frame rate, etc. under which the optical imaging device 140 acquires an optical image. The optical image acquisition unit 103 functions as a first acquisition unit and acquires an optical image from the optical imaging device 140. The image display control unit 104 controls the content to be displayed using the display unit 150, which is a notification means, by adding information to be displayed other than the optical image. Therefore, the image display control unit 104 functions as a notification content determination unit (display content determination unit). The optical image analysis unit 105 analyzes the position, type, direction and posture, and imaging laterality of the subject part in the optical image using the optical image acquired from the optical image acquisition unit 103 and the inspection information acquired from the inspection information management unit 107. Imaging laterality, which is called Laterality in English, is four types of information: left, right, both left and right, and no lateral information. In order, taking the initial letters of Left, Right, Both, Unpaired, it is often abbreviated as L, R, B, U. Then, the results of the analysis of each of the optical images taken in time series and the information associated therewith are stored and managed in the result management unit 109 as history information. This will be described later. Also, the consistency (whether they match) between the setting content of the inspection information managed by the inspection information management unit 107 and the analysis result is determined. Note that the inspection information management unit 107 may acquire imaging protocol information from an external device such as an in-hospital management server, and the imaging protocol information includes site information, imaging direction information, imaging laterality information, and the like. In this sense, the inspection information management unit 107 functions as an acquisition unit (second acquisition unit). For the determination by the optical image analysis unit 105, an inference processing unit 106 using machine learning or the like may be used. The image storage unit 108 stores the images acquired by the radiation image acquisition unit 101 and the optical image acquisition unit 103.

[0015] The operation unit 160, for example, displays a plurality of acquired inspection information in a list format on the display unit 150, and sets the selected inspection information as the inspection target in response to a user's operation input for selecting one piece of inspection information from the list. Note that the user may directly input inspection information from the operation unit 160. Also, after selecting an inspection, an input for selecting the imaging content to be imaged is also accepted.

[0016] Next, according to the flowchart of FIG. 2, the optical image display process according to the first embodiment will be described.

[0017] In step S201, the inspection information management unit 107 causes the user to select one of the acquired plurality of inspection information using the operation unit 160 and sets it as the inspection target. Such processing is realized, for example, by displaying the acquired plurality of inspection information in a list format and setting the selected inspection information as the inspection target in response to a user's operation input for selecting one inspection information from the list. Note that the user may directly input inspection information from the operation unit 160.

[0018] In step S202, the control device 100 starts the inspection by transmitting a signal for causing the radiation detection device 130 to transition to a ready state according to the set inspection information. In response to this signal, for example, the radiation detection device 130 controls the bias power supply by the main control circuit and applies a bias voltage to the two-dimensional imaging element. Thereafter, in order to read out the dark current signal accumulated in the pixels, the drive circuit initializes reading out the image signal from the pixel array. After the initialization is completed, the radiation detection device 130 transmits state information indicating that it is in a state ready to obtain a radiation image to the control device 100. Also, the control device 100 (inspection information management unit 107) sets the operation parameters (such as tube voltage) of the radiation generation device 120 based on the inspection information selected in step S201. When the control device 100 receives a notification from the radiation detection device 120 that the imaging preparation is complete based on the state information, the control device 100 notifies the radiation generation device 120 of exposure permission.

[0019] In step S203, the optical image acquisition unit 103 acquires the optical image captured by the optical imaging device 140.

[0020] In step S204, the optical image analysis unit 105 analyzes the optical image using the optical image acquired by the optical image acquisition unit 103 and the inspection information acquired by the inspection information management unit 107. As the image input to the optical image analysis unit 105, all the images acquired by the optical image acquisition unit 103 may be used, or the images to be used may be thinned out according to the analysis content and input to the optical image analysis unit 105. That is, the thinning of the images may be determined based on the processing load of the optical image analysis unit 105.

[0021] The analysis of the optical image may perform inference processing using machine learning by, for example, the inference processing unit 106. For example, in order to determine the imaging position of the subject, a deep learning model that has learned in advance the position based on the examination information is prepared, the imaging position is recognized for the optical image, and the suitability with the examination information can be determined. Further, the determination of the imaging position of the subject may utilize a skeleton estimation model using deep learning. The PA (Posterior - Anterior) and AP (Anterior - Posterior) in the frontal imaging of the subject are determined from the geometric relationship of the estimated skeleton positions. Alternatively, the RL (Right Lateral) and LL (Left Lateral) in the lateral imaging may be determined. Also, as a variation of the analysis result, in addition to the determination result of "match" or "mismatch" between the suitability of the imaging position of the subject, that is, the analysis result and the imaging protocol, "person not detected" or "subject identification impossible" etc. within the optical image may be output as the analysis result. In this way, the optical image is analyzed regarding the suitability of the imaging position, and the analysis result is output to the result management unit 109 in time series. Therefore, the result management unit 109 manages the information of the optical image analysis result itself (PA, AP, RL, LL, etc.) and the information associated with the analysis result (match, mismatch, person not detected, subject identification impossible, etc.), and manages this information as history information. Here, the information of the analysis result itself and the information associated with the analysis result are collectively referred to as the information related to the analysis result and will be expressed hereinafter. Also, managing as history information means managing the information related to the analysis result of each one of the time - series optical images in time series, and simply put, it can also be said to be the history of the information related to the analysis result. Therefore, the result management unit 109 manages the information of the optical image analysis result itself and its history, and also manages the information associated with the analysis result and its history. Furthermore, it may manage whether those history information are stable (the same result is repeated in time series) or unstable (the result changes with time).

[0022] In step S205, the optical image acquisition unit 103 controls the display content of the optical image acquired by the optical image display control unit 104 and displays it on the display unit 150.

[0023] In step S206, for the history of the analysis results of the time-series optical images managed by the result management unit 109 of the optical image analysis unit 105, the analysis results of several past images are verified from the current optical image. If the analysis results are stable, the analysis results are input to the optical image display control unit 104 in S207 to control the display content and display it on the display unit 150. For example, when the technician is positioning the subject, since the technician is also reflected in the optical image, the suitability of the subject's imaging position cannot be correctly determined. In such a case where the analysis results are not stable, it may be possible to display that the analysis results are not stable, or it may not be necessary to output the analysis results to the display unit (it may not be necessary to display them). For example, only the optical image may be output to and displayed on the display unit, and the analysis results may not be output (not displayed). Or, the instability may be conveyed to the user by displaying the analysis results in time series as they are. Here, the number of images for determining the stability of the analysis results may be determined based on the frame rate of the image analysis. For example, the image analysis process may be executed at 2 fps while displaying the optical image at 30 fps (frame per second). In this case, the suitability of the subject's imaging position is determined every 0.5 seconds. Assuming the time when the technician finishes positioning the subject and returns to the operation room, that is, the time when the subject is fixing the approximate position, the number of images for determining the stability of the analysis results may be set. For example, assuming 3 seconds at 2 fps, the stability of the determination result may be determined based on the analysis results of 6 optical images. Thus, the number of optical images analyzed by the optical image analysis unit 105 may be less than the number of optical images acquired by the optical image acquisition unit 103. And when all the histories of the analysis results match, it may be determined as stable, or the analysis results that occur most frequently and reach a certain ratio may be determined as the result. Also, considering the fluctuations (such as false estimation) of the image analysis, the number of images for determining stability may be set slightly larger, and if the determination results are stable at a predetermined number of images (for example, 80%), it may be determined as the determination result. In this way, based on a part of the history information managed by the result management unit 109, the stability of the analysis results (or the stability of the determination result of the consistency between the analysis results and the protocol) may be determined, and the content to be notified to the user may be determined.When the history information is stable, the optical image acquired by the optical image acquisition unit 103 and the information related to the analysis result are output to the display unit 150 for display. Specifically, together with the optical image, information on the analysis result itself (PA, AP, RL, LL, etc.), information associated with the analysis result (consistency, inconsistency, person not detected, subject identification impossible, etc.), the history information, and the fact that the history is stable are displayed on the display unit 150.

[0024] In addition, it is sufficient if such information is displayed when the technician returns to the operation room. If the subject's body position does not match the inspection information, repositioning the subject can prevent incorrect exposure. Since the sizes of the examination room and the operation room vary for each hospital facility, the number of image sheets for determining the stability of the analysis result may be determined by the characteristics of the optical imaging device 104 and the assumed time from positioning to radiographic imaging. In addition, the analysis range of the optical image may be limited to the area irradiated with radiation, and the analysis range of the optical image may be determined based on settings such as a collimator.

[0025] Also, while real-time performance is required for optical image display as much as possible, it is not very preferable for the analysis result to change for each frame and be directly displayed as the determination result. That is, the display of the image analysis result can be performed by analyzing the optical image decimated based on the image processing load, and the analysis result can be determined based on the history, so that the display content of the analysis result can be displayed as stable information.

[0026] In the present embodiment, the suitability between the imaging position of the subject and the inspection information has been described, but it is not limited thereto. For example, the suitability of the imaging site may be determined, or the suitability of laterality may be determined in the case of limb joint imaging. Needless to say, for example, in the case of Rosenberg imaging of the knee, the suitability of the imaging position itself may be determined, or the suitability of the distance and angle between the radiation generator 120 and the subject may be determined.

[0027] Next, the display content of the optical image display control unit 104 will be exemplified using the display example in FIG. 3. Each display item may be at an arbitrary position and may not include any of the display items.

[0028] The optical image display unit 301 is a display unit including display items 302 to 306.

[0029] The optical image display area 302 is an area for displaying the optical image acquired from the optical image acquisition unit 103.

[0030] The optical image 303 is the optical image acquired from the optical image acquisition unit 103. An optical image obtained by performing image processing in conjunction with geometric transformations such as rotation and inversion settings of the optical image may be displayed. The rotation of the optical image may be automated. If a person can be detected from the optical image and the body axis can be determined, the image can also be rotated based on that. Here, the suitable orientation may change depending on the inspection information. For example, in the case of standing position photography, it is preferable that the body axis is in the vertical direction (head up), while in the case of decubitus photography, it may be preferable that the body axis is horizontal.

[0031] The icon 304 during execution of optical image analysis processing is an icon indicating that optical image analysis is being performed in the optical image analysis unit 105. For example, in the optical image analysis unit 105, when the inspection information is a photographing site that is not the target of image analysis, etc., the icon 304 during execution of optical image analysis processing is made non-displayed. When it is the image analysis target site, by displaying the icon 304 during execution of optical image analysis processing in step S302, it is visually notified to the user whether optical image analysis is being performed.

[0032] The optical image analysis target detection frame 305 is a frame indicating that a single human body has been detected and its detection area in the optical image analysis unit 105. For example, in the optical image analysis unit 105, when no human body is detected, the optical image analysis target detection frame 305 is made non-displayed. When a human body is detected, by displaying the optical image analysis target detection frame 305, the human body detection result of the optical image analysis and its area are visually notified to the user.

[0033] The optical image analysis result content display area 306 is an area that shows at least one analysis result of a part, direction, and laterality in the optical image analysis unit 105. For example, in the optical image analysis unit 105, when the determination result is a mismatch in part, direction, or laterality, the content of each mismatch may be displayed in text. Also, in the optical image analysis unit 105, when the determination result is indeterminable, the fact that it is indeterminable or the reason for being indeterminable may be displayed. Further, in the optical image analysis unit 105, when it is consistent, nothing may be displayed, or the fact of being consistent may be displayed. Alternatively, when the history of the analysis results in the optical image analysis unit 105 is not stable, content indicating that the positioning is not yet stable may be displayed. Also, the determination result may be notified to the optical image display area 302 by means other than text, such as using figures, symbols, colors, etc., in addition to the optical image analysis result content display area 306.

[0034] The above is an example and does not limit the determination result and display content.

[0035] As described above, according to the first embodiment, by determining the consistency between the specified imaging technique and the actual positioning of the subject, it is possible to prevent imaging defects or improve the efficiency of the workflow. Also, when the determination result is not stable, it is possible to make the user understand it. Further, for the optical image display, while maintaining real-time performance, the analysis result is judged based on the history, so it is possible to output a stable analysis result.

[0036] [Second Embodiment] In the second embodiment, the differences from the first embodiment will be described.

[0037] The optical image display process according to the second embodiment will be described according to the flowchart of FIG. 4.

[0038] S401 to S404 are the same as S201 to S204 described in the first embodiment. Here, S405 and subsequent steps, which are the differences from FIG. 2, will be described in detail. In the first embodiment, it was also shown that an optical image is displayed on the display unit 150 independently of the optical image analysis. On the other hand, in large hospital facilities, there are multiple examination rooms, and the operation room may be a common space. In such a case, from the perspective of privacy, there may be cases where it is not desirable for the optical image of the subject to continue to be displayed in the operation room. Therefore, in this embodiment, in S405, it is determined whether the determination result of the image analysis is stable, and if it is stable, the optical image and the analysis result are displayed in S406. Even after being displayed once, if the determination result of the image analysis becomes unstable again, the optical image and the analysis result may be hidden.

[0039] In this way, based on the analysis result of the optical image, by switching the display / hiding of the optical image and the analysis result, it becomes possible to reduce the unnecessary continuous display of the optical image of the subject in the operation room. Of course, depending on the examination information, for example, in examinations where the subject does not wear clothes, it goes without saying that the display of the optical image may be hidden in advance and only the analysis result may be displayed. Also, a setting for selecting the display / hiding of the optical image may be provided in advance, or an icon (not shown) for controlling the display / hiding of the optical image may be separately provided in the optical image display unit 301.

[0040] [Other Embodiments] In the first embodiment, the suitability determination with the examination information was described as the history of the analysis result in the optical image analysis unit 105, but the following modifications are also conceivable.

[0041] [Modification Example 1] As an example of the inference processing unit 106 in the optical image analysis unit 105, first, human detection is performed, and skeleton estimation is performed on the detected human detection region. Further, when determining whether the body position of the subject matches the examination information based on the skeleton position information, unnecessary processing load can be reduced by performing skeleton detection at the stage when the human detection region is stable. That is, the human detection region may be managed as a history of the analysis results. Whether the human detection region is stable is managed as a history using, for example, the area of the human detection region and the area of the overlapping portion in the optical image to be analyzed and the previous optical image. As a result, when the human detection region is stable, it becomes possible to reduce unnecessary processing by performing skeleton detection and body position determination.

[0042] (Modification Example 2) Motion detection may be performed as image analysis in the optical image analysis unit 105. There are cases where the subject moves while the technician is heading towards the operation room after positioning, and notifying this can provide useful information. Therefore, the amount of motion detection between images may be managed as a history using a plurality of optical images in time series. As an evaluation value for motion detection, for example, a known POC (Phase Only Correlation) can be used. This calculates the phase correlation by performing Fourier transform on two images respectively. When the two images completely match, the peak value becomes 1, and the peak value becomes lower as the deviation between the images increases. The evaluation value of this POC is managed in the history as "no motion detection" when it is equal to or higher than a preset threshold value (for example, 0.8), and "motion detection" when it is lower than the threshold value. As a method for motion detection, human detection may be performed from the optical image, and the determination may be made based on the positional deviation of the human detection area between the images. Also, the skeleton of the subject may be detected and the determination may be made based on the positional deviation of the skeleton between the images. Further, based on the examination information, that is, based on the imaging site, the skeleton for determining the movement may be determined. By managing the motion detection as a history in this way and determining the motion detection based on a predetermined number of histories, when it is determined that there is no motion detection for a certain period of time, the appropriateness of the examination information and the imaging position of the subject may be displayed on the screen. On the other hand, when there is a temporary movement (for example, the subject sneezes, etc.) in the history, by notifying the content on the screen, it becomes possible for the technician to reconfirm whether there is a problem with the imaging position of the subject by checking the display of the optical image.

[0043] The disclosure of this specification includes the following radiation imaging control device and radiation imaging system.

[0044] (Item 1) A first acquisition unit that acquires a plurality of optical images acquired at different timings for a subject to be radiographed; An optical image analysis unit that analyzes a plurality of at least some of the plurality of optical images respectively; A result management unit that manages information related to the analysis results of each of the plurality of optical images analyzed by the optical image analysis unit as history information; A notification content determination unit that determines the content to be notified to the user based on the history information and whether to output the content to the notification means A radiation imaging control device comprising the same

[0045] (Item 2) The radiation imaging control device according to item 1, wherein the result management unit also manages information related to the analysis result

[0046] (Item 3) The radiation imaging control device according to item 1 or 2, wherein the notification content determination unit has a function of outputting the optical image acquired by the first acquisition means to the notification means

[0047] (Item 4) The radiation imaging control device according to any one of items 1 to 3, wherein the optical image analysis unit analyzes the optical image for at least one of the part, direction, and imaging laterality of the subject located in the region irradiated with radiation

[0048] (Item 5) The radiation imaging control device according to any one of items 1 to 4, further comprising a second acquisition unit that acquires at least one of the part information, imaging direction information, and imaging laterality information of the imaging protocol regarding the subject, and the result management unit determines the consistency between the result of the optical image analysis unit analyzing at least one of the part, direction, and imaging laterality of the subject for each of the plurality of optical images and at least one of the part information, imaging direction information, and imaging laterality information of the imaging protocol acquired by the second acquisition unit, and manages each determination result as the history information

[0049] (Item 6) The radiation imaging control device according to item 5, wherein the result management unit also manages the information of the determination result

[0050] (Item 7) The number of optical images analyzed by the optical image analysis unit is less than the number of optical images acquired by the first acquisition unit, and the radiation imaging control apparatus according to any one of items 1 to 6.

[0051] (Item 8) The notification content determination unit determines the content to be notified to the user based on a part of the history information managed by the result management unit, and the radiation imaging control apparatus according to any one of items 1 to 7.

[0052] (Item 9) When the history information is stable, the notification content determination unit determines the optical image acquired by the first acquisition means and the analysis result as the notification content, and outputs the determined notification content to the notification means, and the radiation imaging control apparatus according to any one of items 1 to 8.

[0053] (Item 10) When the history information is stable, the notification content determination unit determines the optical image acquired by the first acquisition means and the determination result as the notification content, and outputs the determined notification content to the notification means, and the radiation imaging control apparatus according to item 5.

[0054] (Item 11) When the history information is not stable, the notification content determination unit determines the history information as the notification content, and outputs the determined notification content to the notification means, and the radiation imaging control apparatus according to any one of items 1 to 10.

[0055] (Item 12) The notification content is information indicating that information related to the analysis result is not stable, and the radiation imaging control apparatus according to any one of items 1 to 11.

[0056] (Item 13) When the history information is not stable, the notification content determination unit does not output the notification content to the notification means, and the radiation imaging control apparatus according to any one of items 1 to 12.

[0057] (Item 14) A radiation imaging system comprising a radiation detection device that generates a radiation image upon receiving radiation irradiation, and the radiation imaging control device according to any one of Items 1 to 13.

Explanation of Signs

[0058] 100 Control device 101 Radiation image acquisition unit 103 Optical image acquisition unit 104 Optical image display control unit 105 Optical image analysis unit 106 Inference processing unit 107 Inspection information management unit 108 Image storage unit 109 Result management unit 130 Radiation detection device 140 Optical imaging device 150 Display unit

Claims

1. A first acquisition unit that acquires a plurality of optical images obtained at different timings for a subject to be radiographed; An optical image analysis unit that analyzes a plurality of at least some of the plurality of optical images respectively; A result management unit that manages, as history information, information related to the analysis results of each of the plurality of optical images analyzed by the optical image analysis unit; A notification content determination unit that determines the content to be notified to the user based on the history information and whether to output the content to a notification means A radiographic control apparatus comprising the same.

2. The radiographic control apparatus according to claim 1, wherein the result management unit also manages information related to the analysis result.

3. The radiographic control apparatus according to claim 1, wherein the notification content determination unit has a function of outputting the optical image acquired by the first acquisition means to the notification means.

4. The radiographic control apparatus according to claim 1, wherein the optical image analysis unit analyzes the optical image for at least one of a part, a direction, and a shooting side of a subject located in an area irradiated with radiation.

5. The apparatus further comprises a second acquisition unit that acquires at least one of part information, shooting direction information, and shooting side information of a shooting protocol regarding the subject, and the result management unit determines the result of the optical image analysis unit analyzing at least one of the part, the direction, and the shooting side of the subject for each of the plurality of optical images, and the at least one of the part information, the shooting direction information, and the shooting side information of the shooting protocol acquired by the second acquisition unit, and manages each determination result as the history information. The radiographic control apparatus according to claim 1.

6. The radiographic control apparatus according to claim 5, wherein the result management unit also manages information of the determination result.

7. The radiographic control apparatus according to claim 1, wherein the number of optical images analyzed by the optical image analysis unit is less than the number of optical images acquired by the first acquisition unit.

8. The radiographic control apparatus according to claim 1, wherein the notification content determination unit determines the content to be notified to the user based on a part of the history information managed by the result management unit.

9. The radiation imaging control apparatus according to claim 1, wherein when the history information is stable, the notification content determination unit determines the optical image acquired by the first acquisition means and the analysis result as the notification content, and outputs the determined notification content to the notification means.

10. The radiation imaging control apparatus according to claim 5, wherein when the history information is stable, the notification content determination unit determines the optical image acquired by the first acquisition means and the determination result as the notification content, and outputs the determined notification content to the notification means.

11. The radiation imaging control apparatus according to claim 1, wherein when the history information is not stable, the notification content determination unit determines the history information as the notification content, and outputs the determined notification content to the notification means.

12. The radiation imaging control apparatus according to claim 1, wherein the notification content is information indicating that information related to the analysis result is not stable.

13. The radiation imaging control apparatus according to claim 1, wherein when the history information is not stable, the notification content determination unit does not output the notification content to the notification means.

14. A radiation imaging system comprising a radiation detection device that generates a radiation image by receiving radiation irradiation, and the radiation imaging control apparatus according to claim 1.

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