Dynamic image processing device, mobile radiographic apparatus, dynamic image processing system, program, and dynamic image processing method

Abstract

To perform an appropriate dynamic analysis by performing appropriate removal processing of scattered ray components to a dynamic image.SOLUTION: A body 1 of a mobile radiographic apparatus 10 as a dynamic image analysis device includes image processing means for performing scattered ray removal processing of a dynamic image photographed by applying radiations X to an object S, and a control section 101 functioning as acquisition means for acquiring at least one of photographing conditions set so as to photograph a dynamic image. The control section 101 as image processing means performs scattered ray removal processing to a dynamic image on the basis of at least one of a predetermined condition, and photographing conditions acquired as the acquisition means.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a dynamic image processing device, a mobile radiography device, a dynamic image processing system, a program, and a dynamic image processing method. [Background technology]

[0002] When radiography is performed using a grid, it is possible to obtain a radiographic image in which scattered radiation components are reduced or removed. However, radiographic images captured without using a grid still contain scattered radiation components. For this reason, a technique has been known in which a radiographic image captured without using a grid is subjected to a scattered radiation removal process to remove scattered radiation, thereby obtaining a high-contrast image in which the effects of scattered radiation are reduced. For example, Patent Documents 1 and 2 describe a technique for estimating scattered radiation components based on the radiography conditions and the captured image, and subtracting the scattered radiation components from the captured image to obtain a high-contrast image free of scattered radiation.

[0003] Furthermore, when the radiation image is a moving image, a technique is also known that uses inter-frame similarity specific to moving images to improve the speed of the scattered radiation removal process. For example, Patent Document 3 focuses on the fact that the calculation time is long when body thickness distribution information, which is one of the parameters required for scattered radiation removal processing, is calculated for all frames of a moving image, and describes that after the body thickness distribution is calculated and determined for one frame image, the determined body thickness distribution information is commonly used for other frame images.

[0004] Patent document 4 also describes that the processing time for dynamic images can be shortened by selecting the scattered radiation component removal processing to be applied to the dynamic images based on order information, for example by not performing the scattered radiation component removal processing depending on the type of analysis.

[0005] The effect of scattered rays on a radiation image varies depending on the subject's body thickness, the conditions at the time of radiation imaging, etc. For this reason, when performing scattered radiation removal processing, processing is performed taking into consideration the subject's body thickness, the conditions at the time of radiation imaging (imaging conditions), etc. When an image processing device (e.g., a console) that performs image processing such as scattered radiation removal processing is linked to a radiation irradiation device, the image processing device can obtain the imaging conditions from the radiation irradiation device. However, in a system in which the console and the radiation irradiation device are not linked, the image processing device cannot obtain the parameters (actual values) used in the actual imaging. Therefore, in the scattered radiation removal process for a still image of radiation, estimated values ​​(or preset values ​​stored in the image processing device) are used instead of the actual values ​​used in the actual imaging.

[0006] Even in a system in which a radiation irradiation device and an image processing device are linked, the parameters (actual values) used in the actual imaging are provided from the radiation irradiation device to the image processing device after the imaging is completed. The scattered radiation removal process for removing scattered radiation components from a radiation image requires a very long processing time. Therefore, in order to speed up the generation of a radiation image that has been subjected to scattered radiation removal processing, estimated values ​​(or preset values) are used in the same way as when the two devices are not linked, without waiting for the provision of actual values ​​from the radiation irradiation device.

[0007] In particular, in the case of dynamic imaging, the imaging time is significantly longer than in the case of still image imaging, and image processing such as the process of removing scattered radiation also requires a huge amount of time. It is desirable to start the scattered radiation removal process immediately after the measurement. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] JP 2016-202219 A [Patent Document 2] JP 2014-207958 A [Patent Document 3] JP 2016-063926 A [Patent Document 4] Patent No. 7078167 Summary of the Invention [Problem to be solved by the invention]

[0009] In the case of still images, the image is simply displayed and observed, and even if scattered radiation removal processing is performed using estimated values ​​(or preset values), no degradation in image quality to a level that would be problematic when observing the image is observed. However, in the case of dynamic images, various dynamic analyses may be performed in addition to displaying and observing them.

[0010] In this regard, when dynamic analysis is performed on a dynamic image that has been subjected to scattered radiation removal processing using an estimated value (or preset value), image quality degradation occurs that cannot be predicted when the dynamic image is simply observed. In other words, the inventors have found that while the degradation in image quality caused by the scattered radiation removal processing using an estimated value (or preset value) does not pose a problem when the dynamic image is simply observed, when dynamic analysis is performed, it may not be possible to perform a good dynamic analysis, which is a new problem that cannot be predicted when the dynamic image is simply displayed and observed.

[0011] The present invention has been made in consideration of the above problems, and aims to provide a dynamic image processing device, a mobile radiography device, a dynamic image processing system, a program, and a dynamic image processing method that are capable of performing excellent dynamic analysis. [Means for solving the problem]

[0012] In order to solve the above problems, the dynamic image processing device of the present invention comprises: an image processing means for performing a scattered radiation removal process on a dynamic image captured by irradiating a subject with radiation; An acquisition means for acquiring at least one of the imaging conditions set for capturing the dynamic image; having The image processing means is characterized in that it performs scattered radiation removal processing on the dynamic image based on at least one of predetermined conditions and the imaging conditions acquired by the acquisition means.

[0013] According to another aspect of the present invention, there is provided a dynamic image processing device comprising: an image processing means for performing a scattered radiation removal process on a dynamic image captured by irradiating a subject with radiation; An acquisition means for acquiring at least one of the imaging conditions set for capturing the dynamic image; A storage means for storing predetermined parameters for the scattered radiation removal process; having The image processing means is characterized in that it applies scattered radiation removal processing to the dynamic image based on the parameters to generate a first scattered radiation removed image, and applies scattered radiation removal processing to the dynamic image based on at least one of the shooting conditions acquired by the acquisition means to generate a second scattered radiation removed image.

[0014] The mobile radiographic apparatus of the present invention comprises: The present invention is characterized in that the dynamic image processing device according to any one of claims 1 to 10 is installed.

[0015] The dynamic image processing system of the present invention comprises: a radiation irradiation device for irradiating radiation; a radiation imaging device for generating a dynamic image based on radiation irradiated from the radiation irradiation device and transmitted through a subject; a dynamic image processing device for performing a scattered radiation removal process on the dynamic image; an analysis processing device that performs dynamic analysis processing on the dynamic image that has been subjected to the scattered radiation removal processing; having The dynamic image processing device is characterized in that it performs scattered radiation removal processing based on at least one of predetermined conditions and imaging conditions set for capturing dynamic images.

[0016] The dynamic image processing system of the present invention comprises: a radiation irradiation device for irradiating radiation; a radiation imaging device for generating a dynamic image based on radiation irradiated from the radiation irradiation device and transmitted through a subject; a dynamic image processing device for performing a scattered radiation removal process on the dynamic image; a storage means for storing predetermined parameters for the scattered radiation removal processing; an analysis processing device that performs dynamic analysis processing on the dynamic image that has been subjected to the scattered radiation removal processing; having The dynamic image processing device is characterized by performing a first scattered radiation removal process on the dynamic image based on the parameters, and performing a second scattered radiation removal process on the dynamic image based on at least one of predetermined conditions and shooting conditions set for shooting the dynamic image.

[0017] The program of the present invention comprises: On the computer, an image processing function for performing scattered radiation removal processing on dynamic images captured by irradiating a subject with radiation; An acquisition function for acquiring at least one of the imaging conditions set for capturing the dynamic image; Realize this, The image processing function is characterized in that it performs scattered radiation removal processing on the dynamic image based on at least one of predetermined conditions and the shooting conditions acquired by the acquisition function.

[0018] The dynamic image processing method of the present invention comprises the steps of: an image processing step of performing a scattered radiation removal process on dynamic images captured by irradiating a subject with radiation; An acquisition step of acquiring at least one of the imaging conditions set for capturing the dynamic image; Including, The image processing step is characterized in that a scattered radiation removal process is performed on the dynamic image based on at least one of predetermined conditions and the imaging conditions acquired in the acquisition step. Effect of the Invention

[0019] According to the present invention, an appropriate process for removing scattered radiation components is performed on dynamic images, making it possible to perform good dynamic analysis. [Brief description of the drawings]

[0020] [Figure 1] 1 is a diagram illustrating an example of the overall configuration of a dynamic image processing system. [Diagram 2] 2 is a block diagram showing a functional configuration of the mobile radiation imaging apparatus of FIG. 1. FIG. [Diagram 3] 5A to 5C are explanatory diagrams illustrating shooting conditions acquired by an image processing means at each timing. [Figure 4] 11 is a table showing an example of parameters included in the imaging conditions. [Diagram 5] 11 is a flowchart showing dynamic image processing according to a first technique. [Figure 6] 13 is a flowchart showing dynamic image processing according to a second technique. [Figure 7] 13 is a flowchart showing dynamic image processing according to a third technique. [Figure 8] FIG. 13 is a diagram showing an example of a display screen on which an image after scattered radiation removal processing is displayed. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] (Configuration of dynamic image processing system 100) First, the configuration of the embodiment of the present invention will be described. Fig. 1 shows an example of the overall configuration of a dynamic image processing system 100 in this embodiment. As shown in Fig. 1, the dynamic image processing system 100 is configured by connecting a mobile radiography device 10, a dynamic analysis device 20, a RIS (Radiology Information System) 30, and a PACS (Picture Archiving and Communication System) 40 via a communication network N such as a LAN (Local Area Network) or a WAN (Wide Area Network) so as to be able to transmit and receive data. The mobile radiography device 10 is connected to the communication network N via a wireless LAN wireless access point ("AP" in Fig. 1, etc.) 6 or a wired LAN cable (not shown). A plurality of wireless access points 6 are provided in the medical facility in which the dynamic image processing system 100 is installed. Each device constituting the dynamic image processing system 100 complies with the Digital Image and Communications in Medicine (DICOM) standard, and communication between the devices is performed in accordance with DICOM.

[0022] The mobile radiography device 10 is, for example, a device for making rounds to take radiographs of patients who have difficulty moving. The mobile radiography device 10 has wheels W on the main body 1 and is configured as a mobile medical cart. Note that the mobile radiography device 10 may be a portable device that does not have wheels. The main body 1 is provided with a storage section (not shown) for storing a flat panel detector (FPD) 2 (described later). The storage section is provided with a connector for connecting to the stored FPD 2, so that the stored FPD 2 can be transported while charging its battery.

[0023] The mobile radiography device 10 is brought into, for example, an operating room, an intensive care unit (ICU), or a hospital room, and the FPD 2 is inserted between the subject S lying on a bed, for example, and the bed, or into an insertion port provided on the opposite side of the bed (not shown) from the side on which the subject S lies, and radiation is irradiated from the radiation source 3 to perform still image or dynamic image capture of the subject S. In this embodiment, still image capture refers to obtaining one image of the subject S in response to one imaging operation. Dynamic image capture refers to obtaining multiple images of the subject S by repeatedly irradiating the subject S with pulsed radiation such as X-rays at predetermined time intervals (pulse irradiation) or continuously irradiating the subject S with a low dose rate (continuous irradiation) in response to one imaging operation. A series of images obtained by dynamic image capture is called a dynamic image. Also, each of the multiple images constituting a dynamic image is called a frame image. Here, dynamic photography includes video photography but does not include taking still images while displaying a video. Dynamic images include video images but do not include images obtained by taking still images while displaying a video image.

[0024] FIG. 2 is a block diagram showing the functional configuration of the mobile radiation imaging device 10. As shown in FIG. As shown in FIG. 2, the mobile radiation imaging device 10 includes, in addition to a main body 1, an FPD 2, a radiation source 3, an exposure switch 4, and the like.

[0025] The main body 1 of the mobile radiography device 10 functions as a console and a dynamic image processing device. As shown in FIG. 2, the main body 1 is equipped with a control unit 101 and a memory unit 102, and is also configured to include an operation unit 103, a display unit 104, a wireless IF 105, an FPD connection IF 106, a drive unit 108, a battery 109, a power distribution unit 110, etc.

[0026] The control unit 101 is configured to include a calculation means such as a CPU (Central Processing Unit) and a RAM (Random Access Memory) that provides a working area (neither of which are shown in the figures), and the memory unit 102 is a memory means configured to include a ROM (Read Only Memory) and the like (not shown in the figures). The CPU of the control unit 101 reads out the system program and various processing programs stored in the storage unit 102 in response to input from the operation unit 103, expands them in the RAM, and executes various processes according to the expanded programs. The control unit 101 and the storage unit 102 constitute a computer that controls the operation of each unit of the mobile radiation imaging device 10 in cooperation with the various programs.

[0027] For example, in this embodiment, the control unit 101 functions as an image processing means that performs scattered radiation removal processing on dynamic images captured by irradiating radiation onto the subject S, an acquisition means that acquires at least one of the setting conditions (also referred to as ``shooting conditions'') that are set for capturing dynamic images, etc. Details will be described later, but the control unit 101, which serves as an image processing means, performs scattered radiation removal processing on dynamic images in accordance with a program (scattered radiation removal processing program) stored in ROM based on at least one of the ``predetermined conditions'' and the set conditions acquired by the acquisition means. In this embodiment, "scattered radiation removal processing" refers to processing that removes scattered radiation components contained in an image (dynamic image) (to a level that does not affect image analysis, etc.), and includes not only processing that completely removes scattered radiation components, but also processing that reduces scattered radiation components.

[0028] In addition, the storage unit 102, which is a storage means in this embodiment, stores predetermined parameters for the scattered radiation removal process. Here, the "predetermined parameters" are default values ​​of parameters applied to the scattered radiation removal process, and are preset setting conditions (imaging conditions). Hereinafter, the "predetermined parameters" are also referred to as "preset values."

[0029] Order information (examination order information) is transmitted from the RIS 30 to the main body 1 of the mobile radiation imaging device 10. The order information includes information indicating the contents of the order for each imaging included in the examination, and the control unit 101 can specify the contents of the order (examination order) and the corresponding imaging conditions from this order information. Specifically, the order information (information on an examination order) includes examination identification information (examination ID, etc.), examination date, patient information on the patient who will be the subject S (patient ID, name, gender, age, hospital room (ward), etc.), and information on each image taken during the examination (image taking ID, image taking type indicating whether still image taking or dynamic image taking, type of analysis process performed by dynamic analysis device 20 (type of analysis mode, specifically, type or name of analysis process, etc.), requested department, type of emergency or not, etc.).

[0030] In this manner, in the embodiment, order information (examination order information) for dynamic imaging from RIS 30 includes information on the type of dynamic analysis (type of analysis mode) performed in a dynamic analysis device described later. The information on the type of dynamic analysis is information that can identify the type of dynamic analysis to be performed on the dynamic image obtained by imaging.

[0031] In this embodiment, the main body 1 of the mobile radiography device 10, which functions as a console and dynamic image processing device, performs appropriate image processing such as scattered radiation removal on dynamically captured images. However, if the scattered radiation removal processing is not performed appropriately, it may not be possible to perform the subsequent dynamic analysis accurately. For this reason, when an order (examination order) includes a "predetermined analysis process" as described below, the shooting conditions actually used to capture dynamic images ("final shooting setting values" and "actual values ​​(irradiation actual values)" described below) are applied as parameters to the scattered radiation removal process, rather than the "preset values," which are default values ​​that are set in advance and stored in memory unit 102, even if this takes some time. Here, the "predetermined analysis process" refers to, for example, blood flow analysis process or ventilation analysis process in the case of a dynamic image of a subject's chest. When performing dynamic analysis such as blood flow analysis process or ventilation analysis process to obtain dynamic information on the respiratory system or circulatory system, it is necessary to precisely analyze slight changes in signal values, and it is required to perform appropriate processing on the dynamic image that is the subject of the dynamic analysis.

[0032] The memory unit 102 also has a temporary memory area for temporarily storing information (e.g., dynamic images (original images) and images that have been processed for scattered radiation removal) waiting to be sent to an external device (e.g., dynamic analysis device 20).

[0033] The imaging conditions include, for example, the tube voltage [kV], the tube current [mA], the irradiation time [ms], the exposure dose [mAs], the imaging distance (SID) [cm], the grid information during imaging (presence or absence of a grid), the frame rate, and the type of radiation detector (e.g., FPD2). The storage unit 102 stores a table or the like that associates the contents of orders (examination orders) with imaging conditions corresponding to each order. When order information (information on an examination order) is transmitted from the RIS 30, the control unit 101 refers to the storage unit 102 to acquire imaging conditions corresponding to the examination order.

[0034] The operation unit 103 is equipped with a touch panel in which transparent electrodes are arranged in a grid pattern so as to cover the surface of the operation buttons and the display unit 104, and detects the operation contents by the user (such as the type of operation button pressed and the contact position operated with a finger, a touch pen, etc.) and outputs it to the control unit 101 as operation information. The contents operated and input from the operation unit 103 and output to the control unit 101 include, for example, setting conditions set for capturing dynamic images. The control unit 101 acquires the contents output from the operation unit 103 as an acquisition means. In addition, an exposure switch 4 is connected to the operation unit 103 so that the user can instruct irradiation of radiation X. The exposure switch 4 may be connected to the mobile radiation imaging device 10 by wire or wirelessly and be operable remotely. In this way, the user can control the radiation exposure from a location away from the main body 1 of the mobile radiation imaging device 10.

[0035] The display unit 104 is composed of a monitor such as an LCD (Liquid Crystal Display) or a CRT (Cathode Ray Tube), and is configured to display examination order information, captured images, etc. in accordance with the instructions of a display signal input from the control unit 101. The display unit 104 may be connected to the mobile radiation imaging device 10 via a wire or wirelessly to enable remote display. In this way, the user can check various information from a location away from the main body 1 of the mobile radiation imaging device 10. Also, a sub-monitor separate from the display unit 104 may be connected by wire or wirelessly.

[0036] The wireless IF (wireless communication unit) 104 is an interface that is wirelessly connected to the wireless access point 6 and transmits and receives data (input / output) with external devices (such as the dynamic analysis device 20 and the RIS 30) that are connected to the communication network N via the wireless access point 6. The wireless IF 104 functions as a detection unit that receives radio waves from the wireless access point 6 and detects the wireless access point 6. It also acquires the radio wave intensity of the received radio waves. The mobile radiation imaging apparatus 10 may include a wired IF (wired communication unit) for connecting to the communication network N via wired communication by inserting a communication cable and transmitting / receiving data to / from an external device connected to the communication network N. When the mobile radiation imaging apparatus 10 has a wireless communication unit and a wired communication unit, the connection method with the communication network N is configured to be switchable between wired and wireless based on a control signal from the control unit 101.

[0037] The FPD connection IF 106 is an interface for transmitting and receiving data to and from the FPD 2. The FPD connection IF 106 may transmit and receive data via wireless communication, may be connected to a communication cable and transmit and receive data to and from the FPD 2 via wired communication, or may be compatible with both methods. When the FPD connection IF 106 supports both methods, the method of connection with the FPD 2 is configured to be switchable between wired and wireless based on a control signal from the control unit 101.

[0038] The driving unit 108 is a circuit that drives the tube of the radiation source 3. The driving unit 108 and the radiation source 3 are connected via a cable or the like. Upon receiving a control signal from the control unit 101, the driving unit 108 drives the tube based on the control signal to apply a "predetermined voltage" to the radiation source 3. Note that the "predetermined voltage" is a voltage according to preset radiation irradiation conditions (conditions related to radiation irradiation such as the type of imaging (dynamic imaging or still image imaging), tube voltage, tube current, irradiation time, and current-time product (exposure dose)).

[0039] Battery 109 is configured to be capable of supplying the power stored in itself to power distribution unit 110 and storing the power supplied from power distribution unit 110 . The power distribution unit 110 has a power cable 111 with a plug at the tip, and is configured to be able to receive power from the outside by inserting the plug into a nearby outlet. The power distribution unit 110 distributes power supplied from the battery 109 or from the outside to each unit of the mobile radiation imaging device 10.

[0040] The FPD 2 is a radiography device that generates a dynamic image based on the radiation X that is irradiated from a radiation source 3, which is a radiation irradiation device, and passes through a subject S. FPD2 is a cassette-like radiation detector equipped with a substrate on which pixels are arranged two-dimensionally (in a matrix), each pixel having a radiation detection element that generates an electric charge according to the radiation dose when exposed to X-ray radiation and a switch element that stores and releases the electric charge, a readout circuit that reads out the amount of electric charge released from each pixel as a signal value, a control unit that generates image data from the multiple signal values ​​read out by the readout circuit, a communication unit that transmits image data and various signals to main unit 1 via wired or wireless communication, and a connector for inserting a cable that connects to main unit 1.

[0041] The FPD2 may have a built-in scintillator or the like, converting the irradiated radiation X into light of another wavelength, such as visible light, using the scintillator and generating charges according to the converted light (a so-called indirect type), or it may generate charges directly from the radiation X without going through a scintillator or the like (a so-called direct type).

[0042] The radiation source 3 is a radiation irradiation device for irradiating X-rays. The radiation source 3 has, for example, a rotating anode and a filament (not shown). When a voltage is applied from the driving unit 108, the filament irradiates an electron beam corresponding to the voltage toward the rotating anode, and the rotating anode generates radiation X with a dose corresponding to the intensity of the electron beam.

[0043] The dynamic analysis device 20 is an analysis processing device that performs dynamic analysis processing on the dynamic image output from the mobile radiation imaging device 10. In this embodiment, the dynamic analysis device 20 performs an analysis process (dynamic analysis) on the dynamic image that has been subjected to scattered radiation removal processing by the control unit 101 as a dynamic image processing device, and transmits the dynamic image and the analysis results to the PACS 40. The dynamic analysis device 20 is capable of performing multiple types of analysis processes (dynamic analysis), and performs the type of analysis process (dynamic analysis) specified by the order information from among the multiple types of analysis processes (dynamic analysis). For example, in the case of a dynamic image of a subject's chest, various dynamic analysis processes including "predetermined analysis processes" such as blood flow analysis process and ventilation analysis process are performed.

[0044] The RIS 30 is an order issuing device that issues and stores examination order information, and transmits the issued examination order information to the mobile radiation imaging apparatus 10 via the communication network N.

[0045] PACS 40 is an image management device that stores and manages medical images (still images, dynamic images) generated by modalities such as the mobile radiography device 10 and the analysis results by the dynamic analysis device 20, in association with patient information and examination information (e.g., examination ID, examination date and time, imaging area, imaging conditions, etc.).

[0046] (operation) Next, the operation of the mobile radiation imaging device 10 including the main body 1 as a dynamic image processing device, the operation (function) of the dynamic image processing system 100 including the mobile radiation imaging device 10, and a dynamic image processing method will be described with reference to FIGS. 3 to 8. 5 to 7 are flow charts showing an embodiment of a dynamic image processing method, in which the signal flow is indicated by dashed lines. When the contents of the order information are input (specified) by a doctor or the like and an instruction to issue the order information is given, the RIS 30 issues the order information and transmits it to the mobile radiation imaging apparatus 10. In the mobile radiation imaging device 10, when the order information is received from the RIS 30, the control unit 101 stores the received order information in the storage unit 102 and displays it on a display screen (not shown) of the display unit 104. As described above, the order information includes, for example, an examination ID, an examination date, patient information, information on each imaging included in the examination, and the like.

[0047] When any of the order information is selected by operating the operation unit 103 constituted by an operation button, a touch panel, etc., a screen or the like for setting the imaging conditions (irradiation conditions and image reading conditions) corresponding to each imaging order in the radiation source 3 and the FPD 2 is displayed on the display unit 104, etc. Then, the imaging conditions are set by performing input operations on these screens. Specifically, the control unit 101 reads out the imaging conditions according to the order by referring to a table or the like in the storage unit 102, and sets the irradiation conditions (e.g., tube voltage, tube current, irradiation time, exposure dose, imaging distance, grid information, frame rate, etc.) of the read imaging conditions in the drive unit 108. In addition, the control unit 101 transmits the image reading conditions (e.g., frame rate, pixel size, etc.) of the read imaging conditions to the FPD 2 via the FPD connection IF.

[0048] The imaging conditions may be manually set by the user. In this case, when another imaging operation is performed on the same patient and the same part, the imaging conditions that have been set may be automatically inherited without the need to repeatedly set the imaging conditions. This reduces the workload of the user. Normally, when radiography is performed in a general radiography room (not shown), a grid is attached to the radiography table on which the FPD 2 is set. When radiography is performed with a grid, scattered radiation is reduced, so there is little need to perform scattered radiation removal processing by image processing. In contrast, a mobile radiography device 10 such as a medical cart can be easily moved, but usually does not have equipment such as a grid. For images taken without a grid, scattered radiation removal processing must be performed in a dynamic image processing device (main body 1 of the mobile radiography device 10 in this embodiment). This applies whether the radiography is for still images or dynamic images. In the following, a case will be described in which the order is dynamic photography and photography is performed without a grid.

[0049] Dynamic image processing (scattered radiation removal processing) performed in the main body 1 of the mobile radiography device 10 as a dynamic image processing device is performed by applying various parameters set based on the imaging conditions, etc. The effect of scattered radiation on the radiation image differs depending on the body thickness of the subject S, the setting conditions (imaging conditions) during radiation imaging, etc. For this reason, the parameters applied to the scattered radiation removal process are the body thickness of the subject S, the imaging conditions, etc. Among these, parameters other than the imaging conditions, such as the body thickness of the subject S, are determined before imaging, and are values ​​that can be obtained by the main body 1 (dynamic image processing device) without waiting until the end of imaging. In contrast, the setting conditions ("imaging conditions") set for radiation imaging vary depending on the timing at which the main body 1 (control unit 101 of the main body 1) as an image processing means (dynamic image processing device) acquires the "imaging conditions."

[0050] FIG. 3 is an explanatory diagram showing the contents exchanged between the radiation imaging device (radiation source 3) that irradiates radiation X and the main body 1 serving as image processing means (dynamic image processing device, console), and the contents of the “imaging conditions” at each point in time (timing). As shown in FIG. 3, at the initial stage of an imaging instruction, parameters ("preset values") stored in the storage unit 102 or the like are set as "imaging conditions" from the main body 1 as a console to the radiation source 3, which is a radiation imaging device. The radiation imaging device (radiation source 3) queries the console (main unit 1) to confirm whether or not to perform actual imaging based on the received "imaging conditions." The "imaging conditions" for which confirmation is requested become the "final imaging setting values" known by the console (main unit 1) at this point (timing).

[0051] Thereafter, when a user operates the operation unit 103 of the console (main body 1) to input an instruction to change the "imaging conditions", an instruction to set the changed "imaging conditions" is transmitted to the radiation imaging device (radiation source 3). The radiation imaging device (radiation source 3) updates the "imaging conditions" to the changed ones, and queries the console (main body 1) to confirm whether or not to actually perform imaging under the updated "imaging conditions". In addition, when a command to change the "imaging conditions" is input by a user operating the radiation imaging device (radiation source 3), the "imaging conditions" are similarly updated to the changed ones, and the radiation imaging device (radiation source 3) queries the console (main body 1) to confirm whether or not to actually perform imaging under the updated "imaging conditions." In either case, the updated "shooting conditions" for which confirmation is requested become the "final shooting setting values" that the console (main unit 1) knows at this point (timing).

[0052] Then, when radiation X is actually irradiated in the radiation imaging device (radiation source 3), the setting conditions at the time of actual imaging are notified to the console (main unit 1) as "actual values" (irradiation actual values). The "imaging conditions" that the console (main unit 1) grasps at this point (timing) are these "actual values." In addition, if the radiation imaging device (radiation source 3) is not linked to the console (main unit 1), the "actual values" at the time of actual imaging are not notified to the console (main unit 1). In such a case, the user manually inputs the values ​​used by the radiation imaging device (radiation source 3) for actual imaging into the console (main unit 1). In this case, the "values ​​input by the user" replace the "actual values" and become the final "imaging conditions" after imaging.

[0053] In this way, the "imaging conditions" change depending on the timing at which they are acquired by the console (main body 1). The accuracy of the scattered radiation removal process varies depending on the parameters based on the "imaging conditions" at which point in time the scattered radiation removal process is performed. The accuracy of the scattered radiation removal process affects the accuracy of the analysis process that is later performed by the dynamic analysis device 20 on the dynamic images. Among the imaging conditions, as shown in Figure 4, for example, tube voltage [kV], tube current [mA], exposure time [ms], exposure dose [mAs], imaging distance (SID) [cm], and the presence or absence of an additional filter and the type of filter are parameters that particularly affect the analysis processing (kinetic analysis).

[0054] Considering the accuracy of the analysis process (kinetic analysis) performed by the dynamic analysis device 20, there is a demand for highly accurate scattered radiation removal processing by applying parameters based on the "imaging conditions" (i.e., actual values) during actual imaging as much as possible. However, the final "actual values" and the "input values" that replace them are acquired ex post after the actual imaging has been performed. For this reason, if the scattered radiation removal processing is performed after waiting for the acquisition of the "actual values" and "input values," the processing will be completed late, resulting in the patient having to wait a long time.

[0055] For this reason, in this embodiment, the "imaging conditions" applied as parameters in the scattered radiation removal process are changed according to the type of analysis process (kinetic analysis) performed by the dynamic analysis device 20 (type of analysis mode). There are various methods for performing the scattered radiation removal process by appropriately changing the "imaging conditions" applied as parameters, and the method for performing the scattered radiation removal process may be selected by the user. Each method will be described below.

[0056] First, in the first method, as shown in FIG. 5, the control unit 101 of the main body 1, which is a dynamic image processing device, judges whether the analysis mode (type of analysis) of the analysis process (dynamic analysis) performed by the dynamic analysis device 20 is a predetermined mode (predetermined analysis process) (step S1). As described above, the "predetermined analysis process" is, for example, a blood flow analysis process or a ventilation analysis process in the case of a dynamic image obtained by photographing the chest of a subject. Note that other processes that require analysis of minute changes or differences in signal values ​​may also be included in the "predetermined analysis process". The analysis mode of the dynamic analysis is included in, for example, order information (information on an examination order) provided by the RIS 30, and the control unit 101 judges the analysis mode of the dynamic analysis to be performed on the dynamic image based on the examination order.

[0057] When the analysis mode of the dynamic analysis is a predetermined mode (predetermined analysis process) (step S1; YES), the control unit 101, as an acquisition means, acquires the final shooting setting values ​​among the "shooting conditions" set for shooting dynamic images (step S2). Then, the control unit 101, as an image processing means, applies the final imaging setting values ​​as parameters and performs the scattered radiation removal process (step S3). In this case, the control unit 101 may obtain the actual values ​​after the imaging is completed instead of the final imaging setting values, and perform the scattered radiation removal process using the actual values.

[0058] On the other hand, if the analysis mode of the dynamic analysis is not a predetermined mode (predetermined analysis process) (step S1; NO), a process is performed to display an image with a certain degree of sharpness on the display unit 104 of the main body 1, although it does not have to be sharp enough to withstand high-precision analysis process. That is, in this case, the control unit 101, as an acquisition means, acquires preset values ​​from among the "imaging conditions" set for capturing dynamic images (step S4). Then, the control unit 101, as an image processing means, applies the preset values ​​as parameters and performs the scattered radiation removal process (step S5). In this case, the scattered radiation removal process can be performed without waiting for the final imaging setting values ​​and the actual values ​​to be notified, so that the scattered radiation removal process for the dynamic image, which takes a relatively long time, can be started early, thereby reducing the waiting time.

[0059] In either case, an image after the scattered radiation removal process is generated and displayed on the display unit 104 or the like (step S6). The image after the scattered radiation removal process is then output to an external device such as the dynamics analysis device 20 (step S7). The dynamic analysis device 20 that has received the image after the scattered radiation removal process appropriately performs dynamic analysis processing on the image after the scattered radiation removal process (step S8).

[0060] In addition, it is preferable that the display screen 1041 (see Figure 8) of the image after the scattered radiation removal process, which is displayed on the display unit 104 of the main body 1 or on a display unit (not shown) of the dynamic analysis device 20, has an overlaid display field 1041a for information regarding the scattered radiation removal process for the image after the scattered radiation removal process displayed on the display screen 1041, in addition to various values, etc. In the example shown in Figure 8, information regarding scattered radiation removal is displayed in display field 1041a, including whether or not scattered radiation removal processing has been performed (for example, if the image has already had scattered radiation removal processing applied, ``Scattered radiation removal processing: ON'' is displayed as shown in Figure 8, and if it has not been applied, ``Scattered radiation removal processing: OFF'' is displayed), and the type of ``shooting condition'' applied as a parameter during scattered radiation removal processing. For example, if the used parameters are the final shooting setting values, it will say "Parameters used: A", if the used parameters are actual values, it will say "Parameters used: R", and if the used parameters are preset values, the "Parameters used:" column will be left blank (no mark). In this way, the user can easily identify whether the image displayed on the display screen has been processed after scattered radiation removal, and if it has been processed, which shooting conditions have been applied as parameters.

[0061] 6, in the second method, the control unit 101 of the main body 1, as an acquisition unit, acquires preset values ​​from among the "imaging conditions" set for capturing dynamic images (step S11). Then, the control unit 101, as an image processing unit, applies the preset values ​​as parameters to perform scattered radiation removal processing (step S12). In this case, the scattered radiation removal processing can be performed without waiting for notification of the final imaging setting values ​​and actual values, so that the scattered radiation removal processing for dynamic images, which takes a relatively long time, can be started early. Then, an image (first image) after the scattered radiation removal process is generated and displayed on the display unit 104 or the like (step S13).

[0062] Thereafter, when radiation imaging is actually performed, the radiation source 3, which is a radiation imaging device, notifies the control unit 101 of the main body 1 of the result values, which are values ​​actually used in imaging, after imaging is completed (step S14). Then, the control unit 101 of the main body 1 as an image processing means determines whether the analysis mode (type of analysis) of the analysis process (dynamic analysis) performed by the dynamic analysis device 20 is a predetermined mode (predetermined analysis process) (step S15).

[0063] When the analysis mode of the dynamic analysis is a predetermined mode (predetermined analysis process) (step S15 If the result is YES), the control unit 101 applies the actual results as parameters to perform the scattered radiation removal process (step S16). In this case, the control unit 101 may obtain the final imaging setting values ​​instead of the actual results, and perform the scattered radiation removal process using the final imaging setting values. However, in the case of method 2, an image (first image) after the scattered radiation removal process in which the preset values ​​are applied as parameters has already been obtained. For this reason, there is little need to perform the process in a hurry, and if the final actual results have been obtained, it is preferable to apply this to perform the scattered radiation removal process.

[0064] The control unit 101 then generates an image (second image) after the scattered radiation removal process and displays it on the display unit 104 or the like (step S17). The control unit 101 also outputs the image (second image) after the scattered radiation removal process to an external device such as the dynamic analysis device 20 (step S18). On the other hand, if the analysis mode of the dynamic analysis is not the specified mode (specified analysis process) (step S15; NO), the preset value is applied as a parameter and the image after scattered radiation removal processing (first image) is output to an external device such as the dynamic analysis device 20 (step S19). Since the analysis mode (type of analysis) of the analysis process (dynamic analysis) is determined, the scattered radiation removal process may be limited to a frame range according to the analysis mode. For example, in the case of ventilation analysis, the process may be limited to a range of breathing cycles used in the analysis, and the processing load and analysis time may be reduced by narrowing the processing target by limiting the analysis range or output range. Alternatively, the range may be limited only in the case of an image (first image) after scattered radiation removal process using a preset value or the like.

[0065] The dynamic analysis device 20, which has received the image (the first image or the second image) after the scattered radiation removal process, performs dynamic analysis process appropriately on the image after the scattered radiation removal process (step S20). As in the first method, it is preferable to display a display field 1041a for information regarding the scattered radiation removal processing for the displayed image after the scattered radiation removal processing (the first image or the second image) on the display screen 1041 (see Figure 8) of the image after the scattered radiation removal processing displayed on the display unit 104 of the main body 1 or the display unit of the dynamic analysis device 20, etc.

[0066] Moreover, the third method is a flowchart assuming a configuration in which the radiation imaging apparatus and the image processing apparatus (console) are not linked to each other. 7, the control unit 101 of the main body 1, as an image processing means, applies various parameters to perform scattered radiation removal processing (step S31), generates an image after the scattered radiation removal processing, and displays it on the display unit 104 or the like (step S32). As described above, if the radiation imaging device and the image processing device (console) are not linked, it is not expected that the radiation imaging device will notify the actual values ​​used in imaging, and so here, preset values, etc. stored in the memory unit 102 or the like of the main body 1, which is the image processing device (console), are applied as parameters when performing the scattered radiation removal processing.

[0067] Then, the control unit 101 judges whether or not the user has input an instruction to reapply the scattered radiation removal process (step S33). As shown in FIG. 8, the display screen 1041 is provided with a reapply button 1041b for inputting whether or not to reapply the scattered radiation removal processing to the image. The user looks at the image displayed on the display screen 1041 and operates the reapply button 1041b if the scattered radiation removal processing is insufficient, etc. When the reapply button 1041b is operated by the user, the control unit 101 determines that the user has input an instruction to reapply the scattered radiation removal processing (step S33; YES).

[0068] In the third method, as in the first and second methods, a display screen 1041 (see Figure 8) of the image after scattered radiation removal processing, which is displayed on the display unit 104 of the main body 1, etc., displays the image after scattered radiation removal processing, as well as a display field 1041a for information regarding the scattered radiation removal processing applied to the image. The information displayed in the display field 1041a is, for example, what stage of "imaging conditions" was used as a parameter to perform the scattered radiation removal process (i.e., whether it was a preset value or a final imaging setting value or actual value), etc. The user can easily check this information on the screen, and can use it as information when deciding whether or not to reapply the scattered radiation removal process.

[0069] When the user operates the reapply button 1041b, the user manually inputs the irradiation result value at the time of shooting from the operation unit 103 of the main body 1 or the like, and the input result value is accepted by the control unit 101 (step S34). When the input of the actual value (irradiation actual value) is accepted, the control unit 101 applies the actual value as a parameter as an image processing unit, and performs scattered radiation removal processing (step S35). Then, an image after the scattered radiation removal process (image after reapplication) is generated and displayed on the display unit 104 or the like (step S36). In addition, the image after the scattered radiation removal process (image after reapplication) is output to an external device such as the dynamic analysis device 20 (step S37).

[0070] On the other hand, if the user does not input an instruction to reapply the scattered radiation removal process (step S33; NO), the image after the scattered radiation removal process generated in step S32 is output to an external device such as the dynamic analysis device 20 (step S37). Note that when the output is triggered (or at the timing of output), if the scattered radiation removal process can be reapplied based on the irradiation result value, a confirmation display may be displayed on the display unit 104 or the like to ask whether or not it is OK to output an image with scattered radiation removed based on the preset value. By displaying such a confirmation display, it is possible to alert the user. Upon receiving the image after the scattered radiation removal processing (the image generated in step S32 or the image after reapplication generated in step S36), the dynamic analysis device 20 performs dynamic analysis processing as appropriate on the image after the scattered radiation removal processing (step S38).

[0071] In the third method, although it is up to the user to decide, if the image after the scattered radiation removal process is not of a quality suitable for the subsequent dynamic analysis process in the dynamic analysis device 20, the scattered radiation removal process is reapplied using values ​​input by the user instead of actual values ​​as parameters. This prevents dynamic analysis process from being performed on an image of poor quality, thereby preventing a decrease in the quality of the dynamic analysis.

[0072] (effect) As described above, the main body 1 of the mobile radiography device 10 as a dynamic image processing device has a control unit 101 that functions as an image processing means for performing scattered radiation removal processing on a dynamic image captured by irradiating radiation X onto a subject S, and also functions as an acquisition means for acquiring at least one of the "imaging conditions" set for capturing dynamic images, and the control unit 101 that functions as an image processing means performs scattered radiation removal processing on the dynamic image based on the "predetermined conditions" and at least one of the "imaging conditions" acquired by the acquisition means. Although there are cases where performing dynamic analysis on an image that has not been appropriately processed for scattered radiation removal does not provide accurate analysis results, the present embodiment can appropriately perform scattered radiation removal on dynamic images, thereby generating images suitable for dynamic images and enabling good dynamic analysis.

[0073] In this embodiment, at least one of the "imaging conditions" is a condition (actual irradiation value) that is actually used in capturing a dynamic image. This allows for appropriate scattered radiation removal processing suited to actual imaging conditions, making it possible to generate images suitable for dynamic imaging and perform good dynamic analysis.

[0074] In this embodiment, at least one of the "imaging conditions" is a final imaging setting value set for capturing a dynamic image. As shown in Figure 3, the final imaging setting values ​​may be changed or updated before the actual imaging is performed, but they are relatively close to the actual values ​​(irradiation results), and it is possible to perform more appropriate scattered radiation removal processing in line with the actual imaging conditions than if the preset values ​​were used as parameters. This makes it possible to generate images suitable for dynamic images, and to perform good dynamic analysis.

[0075] In addition, in this embodiment, the control unit 101 has a memory unit 102 as a storage means for storing predetermined parameters (preset values) for scattered radiation removal processing, and the control unit 101 as an acquisition means acquires at least one of the conditions (irradiation performance values) actually used in capturing dynamic images or the final shooting setting values ​​set for capturing dynamic images, and as an image processing means, performs scattered radiation removal processing on the dynamic image based on the parameters (preset values) stored in the memory unit 102 to generate a "first scattered radiation removed image", and if the "predetermined condition" is met, further performs scattered radiation removal processing on the dynamic image based on the conditions acquired as the acquisition means (i.e., irradiation performance values ​​and final shooting setting values) to generate a "second scattered radiation removed image". When generating the "first scattered ray removed image," processing can be performed without waiting for actual values, etc., thereby reducing patient waiting time. Furthermore, when generating the "second scattered ray removed image," even if it takes some time, appropriate scattered ray removal processing can be performed in accordance with the actual shooting conditions, thereby providing the dynamic analysis device 20 with an image that can withstand high-precision dynamic analysis. This allows for flexible response depending on the accuracy, etc. required for dynamic analysis.

[0076] In this embodiment, "when a predetermined condition is met" refers to a case where the type of analysis processing to be performed after the scattered radiation removal processing includes a "predetermined analysis processing", and a case where the test order, etc. includes a "predetermined analysis processing". Note that whether or not to perform a "predetermined analysis processing" may be included in the test order, or may be determined by checking the condition settings in the main body 1, which is an image processing device (console), etc. As a result, even if the image (dynamic image) related to the scattered radiation removal processing is of such high precision that it is necessary to distinguish slight differences in signal values, etc., an image that can withstand such high-precision dynamic analysis can be provided to the dynamic analysis device 20. This allows for flexible response depending on the accuracy, etc. required for dynamic analysis.

[0077] In this embodiment, the type of the "predetermined analysis process" is, for example, at least one of a blood flow analysis process and a ventilation analysis process. When performing blood flow analysis processing and ventilation analysis processing using dynamic analysis, it is necessary to perform a highly accurate analysis without overlooking even slight changes in signal values, etc., but in this embodiment, images that can withstand such high-precision dynamic analysis can be generated and provided to the dynamic analysis device 20. This allows for good kinetic analysis.

[0078] Furthermore, "when a predetermined condition is met" may be when an input to reapply the scattered radiation removal process is received from the operator. In this case, although it is up to the user's discretion, if the image after the scattered radiation removal process is not of a quality suitable for the subsequent dynamic analysis process in the dynamic analysis device 20, the scattered radiation removal process can be reapplied using parameters such as values ​​input by the user instead of actual values. Therefore, the dynamic analysis process is not performed on an image of poor quality, and a decrease in the quality of the dynamic analysis can be prevented.

[0079] In addition, when a "first dynamic analysis process" is performed on a dynamic image, an image based on a "second scattered ray removed image" generated by performing a scattered ray removal process based on at least one of the "shooting conditions" acquired by the control unit 101 as an acquisition means after generating a "first scattered ray removed image" is output, and when a "second dynamic analysis process" is performed on a dynamic image, an image based on the "first scattered ray removed image" is output. When generating the "first scattered ray removed image," processing can be performed without waiting for actual values, etc., thereby reducing patient waiting time. Furthermore, when generating the "second scattered ray removed image," even if it takes some time, appropriate scattered ray removal processing can be performed in accordance with the actual shooting conditions, thereby providing the dynamic analysis device 20 with an image that can withstand high-precision dynamic analysis. This allows for flexible response depending on the accuracy, etc. required for dynamic analysis.

[0080] In addition, the main body 1 as a dynamic image processing device has a control unit 101 that functions as an image processing means for performing scattered radiation removal processing on a dynamic image captured by irradiating radiation X onto a subject S, and also functions as an acquisition means for acquiring at least one of the "imaging conditions" set for capturing a dynamic image, and a memory unit 102 that stores predetermined parameters (preset values) for the scattered radiation removal processing, and the control unit 101 as an image processing means performs scattered radiation removal processing on the dynamic image based on the parameters (preset values, etc.) to generate a "first scattered radiation removed image", and performs scattered radiation removal processing on the dynamic image based on at least one of the "imaging conditions" acquired as the acquisition means to generate a "second scattered radiation removed image". When generating the "first scattered ray removed image," processing can be performed without waiting for actual values, etc., thereby reducing patient waiting time. Furthermore, when generating the "second scattered ray removed image," even if it takes some time, appropriate scattered ray removal processing can be performed in accordance with the actual shooting conditions, thereby providing the dynamic analysis device 20 with an image that can withstand high-precision dynamic analysis. This allows for flexible response depending on the accuracy, etc. required for dynamic analysis.

[0081] Furthermore, in this embodiment, the main body 1, which is a dynamic image processing device, is mounted on a mobile radiography device such as a so-called mobile cart. This makes it possible to appropriately apply scattered radiation removal processing to dynamic images even when it is difficult to perform radiography using a grid in an imaging room, such as when the subject S is a patient who cannot move his or her body freely. This makes it possible to generate images suitable for dynamic images, enabling good dynamic analysis.

[0082] (Modification) The description of the above embodiment is merely a preferred example of the present invention, and the present invention is not limited to this.

[0083] For example, in the above embodiment, an example was described in which the dynamic image processing device of the present invention is applied to a mobile radiography device (such as a so-called medical cart), but the present invention is not limited to being applied to a mobile radiography device. For example, it may be applied to the console of a stationary radiography device arranged in a normal radiography room, etc. Even in the case of a stationary radiography device, it is expected that imaging will be performed without using a grid when imaging is performed with only the FPD removed from the device body and placed under the subject S. In such cases, the scattered radiation removal process by the dynamic image processing device of the present invention is particularly useful.

[0084] In the above description, a hard disk, a non-volatile semiconductor memory, or the like is used as a computer-readable medium for the program according to the present invention, but the present invention is not limited to this example. As other computer-readable media, portable recording media such as CD-ROMs can be used. Furthermore, a carrier wave can be used as a medium for providing data of the program according to the present invention via a communication line.

[0085] In addition, the detailed configurations and detailed operations of the dynamic image processing device, mobile radiography device, and each device constituting the dynamic image processing system may be modified as appropriate without departing from the spirit of the present invention. [Explanation of symbols]

[0086] 1 Main unit 2 FPD Cassette 3 Radiation source 101 Control section 102 Storage section 103 Operation section 104 Display section 10 Mobile radiography device 20 Dynamic analysis device 30 RIS 40 PACS 100 Dynamic Image Processing System

Claims

1. an image processing means for performing scattered radiation removal processing on dynamic images captured by irradiating a subject with radiation; and an acquisition means for acquiring at least one of conditions actually used in photographing the dynamic image or final setting conditions set for photographing the dynamic image, the image processing means performs scattered radiation removal processing on the dynamic image based on the conditions acquired by the acquisition means, when the type of dynamic analysis processing to be performed after the scattered radiation removal processing includes a dynamic analysis processing for analyzing changes or differences in signal values; A dynamic image processing device characterized by:

2. A dynamic image processing device as described in claim 1, characterized in that the dynamic analysis process that analyzes changes or differences in the signal values ​​is a blood flow analysis process or a ventilation analysis process.

3. A dynamic image processing device as described in claim 1, further comprising a display means for displaying the dynamic image that has been subjected to scattered radiation removal processing by the image processing means, wherein the display means displays information indicating that scattered radiation removal processing has been performed on the dynamic image based on either the actually used conditions or the final set conditions.

4. a storage means for storing predetermined parameters for the scattered radiation removal process; The dynamic image processing device of claim 1, characterized in that the image processing means performs scattered radiation removal processing on the dynamic image based on the parameters to generate a first scattered radiation removed image, and if the type of dynamic analysis processing to be performed after the scattered radiation removal processing includes blood flow analysis processing or ventilation analysis processing, further performs scattered radiation removal processing on the dynamic image based on either the actually used conditions or the final set conditions to generate a second scattered radiation removed image.

5. Having an input means for accepting input of the actually used conditions by an operator, 2. The dynamic image processing apparatus according to claim 1, wherein the acquisition means acquires the conditions input to the input means as the actually used conditions.

6. The dynamic image includes an image taken without using a grid, 2. The dynamic image processing apparatus according to claim 1, wherein the image processing means performs the scattered radiation removal process when the dynamic image is taken without using a grid.

7. The dynamic image processing device described in claim 1, characterized in that the image processing means performs the scattered radiation removal processing based on either the actually used conditions or the final set conditions, limiting the frame range of the dynamic image according to the type of dynamic analysis processing.

8. The dynamic image processing device described in claim 1, characterized in that the conditions include at least one of information on tube voltage, tube current, irradiation time, exposure dose, shooting distance, and additional filter.

9. A mobile radiographic imaging device comprising the dynamic image processing device according to any one of claims 1 to 8.

10. a radiation irradiation device for irradiating radiation; a radiographic imaging device that generates a dynamic image based on radiation that is irradiated from the radiation irradiation device and transmitted through a subject; a dynamic image processing device having an acquisition means for acquiring at least one of conditions actually used in capturing the dynamic image or final setting conditions set for capturing the dynamic image, and for performing scattered radiation removal processing on the dynamic image; an analysis processing device that performs dynamic analysis processing on the dynamic image that has been subjected to the scattered radiation removal processing; and The dynamic image processing system is characterized in that, when the type of dynamic analysis processing to be performed after scattered radiation removal processing includes dynamic analysis processing that analyzes changes or differences in signal values, the dynamic image processing device performs scattered radiation removal processing on the dynamic image based on the conditions acquired by the acquisition means.

11. On the computer, an image processing function for performing scattered radiation removal processing on dynamic images captured by irradiating a subject with radiation; an acquisition function for acquiring at least one of conditions actually used in capturing the dynamic image or final setting conditions set for capturing the dynamic image; To achieve this, A program characterized in that, when the type of dynamic analysis processing to be performed after scattered radiation removal processing includes dynamic analysis processing that analyzes changes or differences in signal values, the image processing function performs scattered radiation removal processing on the dynamic image based on the conditions acquired by the acquisition function.

12. an image processing step of performing scattered radiation removal processing on dynamic images captured by irradiating a subject with radiation; and acquiring at least one of conditions actually used in capturing the dynamic image or final setting conditions set for capturing the dynamic image, A dynamic image processing method characterized in that, when the type of dynamic analysis processing performed after the scattered radiation removal processing includes a dynamic analysis processing that analyzes changes or differences in signal values, the image processing process performs scattered radiation removal processing on the dynamic image based on the conditions acquired by the acquisition process.

Images