JP2023000006A - Dynamic imaging condition selection device, dynamic imaging condition selection program and dynamic imaging condition selection method - Google Patents

Abstract

To enable the correct diagnosis with a dynamic image having the stable performance by enabling a frame rate of dynamic imaging to be correctly set according to an observation object.SOLUTION: A control unit of a console acquires information about an observation object in dynamic imaging, and selects a frame rate being one of imaging conditions of the dynamic imaging on the basis of the acquired information about the observation object.SELECTED DRAWING: Figure 5

Description

The present invention relates to a dynamic imaging condition selection device, a dynamic imaging condition selection program, and a dynamic imaging condition selection method.

2. Description of the Related Art In recent years, among radiation imaging systems capable of dynamic imaging, systems capable of supporting multiple types of frame rates are known.
For example, in Patent Document 1, each of a radiation generation device and a radiation imaging device can correspond to a plurality of types of frame rates. It is stated that the irradiation of
Further, for example, Patent Literature 2 describes that the frame rate in the radiation detector is set to 3.75 frames/second or more.

Japanese Patent Application Laid-Open No. 2020-54689 JP 2012-110399 A

In dynamic imaging, the frame rate is included in the imaging conditions, and in a system that can handle multiple types of frame rates as described above, the technician can select the frame based on his/her own experience according to the age of the patient, the body part to be imaged, etc. A moving image is captured by specifying a rate.
However, for example, even if the same part (e.g., diaphragm) is photographed in motion, the movement of the diaphragm (e.g., moving distance, moving speed, etc.) may differ between adults and children, or between patients and healthy subjects. . In this case, the frame rate designated by the technician is not always correct, and there are cases where accurate diagnosis cannot be made with the captured dynamic image. Since dynamic imaging takes a long time, the dose per shot is low, but the total dose per shot is higher than that for still images. Therefore, if re-imaging is performed many times in order to obtain an image suitable for diagnosis, the exposure dose will be considerably increased.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and aims to enable accurate diagnosis using dynamic images with stable performance by enabling the frame rate of dynamic imaging to be set correctly according to the object to be observed. aim.

In order to solve the above problems, the dynamic imaging condition selection device according to the present invention includes:
A dynamic imaging condition selection device for selecting imaging conditions for dynamic imaging for imaging dynamics of a subject by sequentially irradiating the subject with radiation,
comprising a selection unit that selects a frame rate, which is one of the imaging conditions for dynamic imaging, based on information about an observation target in dynamic imaging;
characterized by

Further, the dynamic imaging condition selection program according to the present invention includes
A dynamic imaging condition selection program for selecting imaging conditions for dynamic imaging for imaging dynamics of a subject by sequentially irradiating the subject with radiation,
A computer is caused to execute a process of selecting a frame rate, which is one of imaging conditions for dynamic imaging, based on information about an observation target in dynamic imaging.

Further, the dynamic imaging condition selection method according to the present invention includes:
A dynamic imaging condition selection method for selecting imaging conditions for dynamic imaging for imaging the dynamics of a subject by sequentially irradiating the subject with radiation,
The method is characterized by comprising a step of selecting a frame rate, which is one of imaging conditions for dynamic imaging, based on information about an observation target in dynamic imaging.

According to the present invention, since the frame rate of dynamic imaging can be set correctly according to the observation target, it is possible to perform correct diagnosis using dynamic images with stable performance.

1 is a block diagram showing an example of a radiation imaging system according to an embodiment of the present invention; FIG. 2 is a block diagram showing the functional configuration of the console of FIG. 1; FIG. FIG. 4 is a diagram showing the relationship between an observation target and a frame rate; FIG. 10 is a diagram showing an example of a frame rate selection table; FIG. 3 is a flowchart showing the flow of dynamic imaging control processing A executed by the control unit in FIG. 2 in the first embodiment; FIG. 9 is a flow chart showing the flow of dynamic imaging control processing B executed by the control unit in FIG. 2 in the second embodiment; FIG.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the technical scope of the present invention is not limited to the following embodiments and illustrated examples.

[First Embodiment]
<1. Radiation imaging system>
First, a schematic configuration of a radiation imaging system according to the first embodiment of the present invention will be described.
A radiation imaging system (hereinafter referred to as system 100) is a system capable of performing dynamic imaging for imaging the dynamics of a subject by sequentially irradiating the subject with radiation. A plurality of images showing the dynamics of a subject are obtained by dynamic photography. A series of images obtained by dynamic imaging are called dynamic images. Also, each of the plurality of images forming the dynamic image is called a frame image.
Here, "moving image capturing" includes moving image capturing, but does not include capturing still images while displaying moving images. "Moving image" includes moving images, but does not include images obtained by capturing still images while displaying moving images.

FIG. 1 is a block diagram showing system 100 .
The system 100 includes, as shown in FIG. and have.
Each of the devices 1 to 5 can communicate with each other via, for example, a communication network N (LAN (Local Area Network), WAN (Wide Area Network), Internet, etc.).

Note that the system 100 may be installed in an imaging room, or may be configured to be movable (for example, a medical vehicle).
In addition, the system 100 may be capable of communicating with a hospital information system (HIS), a radiology information system (RIS), or the like (not shown).

[1-1. Radiation generator]
The generator 3 includes a generator 31 , an irradiation instruction switch 32 and a radiation source 33 .

The generator 31 applies a voltage corresponding to preset imaging conditions to the radiation source 33 (tube) when the irradiation instruction switch 32 is operated.

When a voltage is applied from the generator 31, the radiation source 33 generates a dose of radiation R (for example, X-rays) corresponding to the applied voltage.

Further, the generator 3 according to the present embodiment is adapted to generate the radiation R in a mode corresponding to the form of the radiographic image to be generated (still image, dynamic image).
In the case of a still image, the radiation R is emitted only once for each depression of the irradiation instruction switch 32 .
In the case of a dynamic image, irradiation of pulsed radiation R is repeated a plurality of times per predetermined time period (for example, 15 times per second) per pressing of the irradiation instruction switch 32 once, or irradiation of radiation R is continued for a predetermined time period. .
In other words, the term "sequential radiation irradiation" in the present invention includes continuous irradiation in which radiation is continuously irradiated and pulse irradiation in which radiation is intermittently applied or not.

[1-2. Radiation imaging device]
The imaging device 1 generates digital data of a radiographic image showing a part of a subject to be imaged.
The imaging device 1 according to this embodiment is a portable FPD (Flat Panel Detector).
Specifically, the image capturing apparatus 1 according to the present embodiment includes an imaging element that receives radiation R to generate an electric charge corresponding to the dose and a switching element that accumulates and discharges the electric charge, although not shown. A sensor substrate arranged in a matrix, a scanning unit that switches ON/OFF of each switch element, a readout unit that reads out the amount of charge emitted from each pixel as a signal value, and a readout unit that controls each unit. A control unit that generates a radiographic image from a plurality of read signal values, and transmits the data of the generated radiographic image, various signals, etc. to other devices (console 2, generator 3, image management device 5, etc.), and other devices It has a communication unit and the like for receiving various information and various signals from.

Then, the imaging device 1 accumulates and discharges electric charges and reads signal values in synchronization with the timing at which the radiation R is emitted from the generator 3, thereby generating image data of a still image (hereinafter referred to as still image data). , or image data of a dynamic image (hereinafter referred to as dynamic image data).
When generating still image data, a radiographic image is generated only once for each depression of the irradiation instruction switch 32 .
When generating dynamic image data, generation of frame images constituting a dynamic image is repeated a plurality of times per predetermined time (for example, 15 times per second) for each depression of the irradiation instruction switch 32 .
The imaging device 1 transmits image data generated by imaging to the console 2 .
Note that the photographing device 1 may be integrated with the generating device 3 .

[1-3. console〕
The console 2 is composed of a PC, a dedicated device, etc., and is a photographing control device for controlling photographing by the photographing device 1 and the generating device 3 .
In this embodiment, the console 2 has a function as a dynamic imaging condition selection device that selects imaging conditions for dynamic imaging for imaging the dynamic state of the subject S.
The imaging conditions include, for example, conditions related to the subject S (imaging site, imaging direction, etc.), conditions related to the irradiation of the radiation R (tube voltage, tube current, irradiation time, current-time product (mAs value), frame rate (for dynamic imaging). case), etc.), and conditions (image size, pixel size, frame rate (in the case of dynamic image capturing), etc.) related to image reading by the image capturing apparatus 1 .
In this embodiment, the console 2 automatically selects at least the frame rate for dynamic imaging among the imaging conditions based on examination order information acquired from other systems (HIS, RIS, etc.). . The examination order information includes, for example, patient information (patient ID, patient name, gender, age, presence or absence of disease, etc.), imaging type (dynamic/still image), imaging site, imaging direction, clinical department, type of analysis (e.g., ventilation, blood flow, amount of movement of a given structure, etc.). Other imaging conditions may similarly be automatically selected (set) based on the examination order information, or may be (manually) selected (set) based on the operation performed on the operation unit 25 by the user (for example, a technician). setting).
The details of this console 2 will be described later.

[1-4. Kinetic analysis device]
The dynamic analysis device 4 analyzes the dynamic image data transmitted from the console 2 and transmits the analysis result to the image management device 5 or the like. The dynamics analysis device 4 can analyze, for example, ventilation, blood flow, the amount of movement of a given structure, and the like.

[1-5. Image management device]
The image management device 5 manages the image data generated by the photographing device 1 and the analysis results generated by the motion analysis device 4 .
Examples of the image management device 5 include a picture archiving and communication system (hereinafter referred to as PACS), an image diagnosis workstation (hereinafter referred to as IWS), and the like.

<2. Console details>
Next, the console 2 having a function as a dynamic imaging condition selection device will be described in detail.

[2-1. Configuration of console]
FIG. 2 is a block diagram showing the functional configuration of the console 2. As shown in FIG.
As shown in FIG. 2, the console 2 includes a control unit 21, a storage unit 22, a communication unit 23, a display unit 24, and an operation unit 25. Each of the units 21 to 25 is connected to a bus. etc. are electrically connected.

The control unit 21 includes a CPU (Central Processing Unit), a RAM (Random Access Memory)
), ROM (Read Only Memory), and the like.
The ROM stores various programs executed by the CPU, parameters necessary for executing the programs, and the like.
Then, the CPU reads out various programs stored in the ROM, expands them in the RAM, and executes various processes including the dynamic imaging control process A described later according to the expanded programs, thereby operating the console 2. are centrally controlled.
The control unit 21 functions as a selection unit by executing dynamic imaging control processing A, which will be described later.

The storage unit 22 is configured by a nonvolatile memory, hard disk, or the like.
The storage unit 22 stores a frame rate selection table 221 that is referred to when selecting a frame rate for dynamic imaging (see FIG. 4). The frame rate selection table 221 is a table that stores information about an observation target in dynamic imaging and an optimum frame rate for the observation target in association with each other.
"Information about an observation target in a dynamic image" (hereinafter referred to as information about an observation target) is information about an object to be observed by a dynamic image obtained by dynamic imaging. "Information about observation target" includes patient information (age, gender, presence or absence of disease, etc.), type of observation target (respiratory system, circulatory system, locomotion system, etc.), observation details (ventilation, blood flow, prescribed structure, etc.). movement amount, etc.). Note that the type of the observation target may be information representing the organ system of the observation target as described above, information representing the observation target region (chest, head, neck, . . . ), or both. may be expressed as

Here, selection of a frame rate in dynamic imaging is important for obtaining dynamic images with stable performance suitable for diagnosis. It is also important from the viewpoint of patient exposure dose and processing efficiency.
FIG. 3 is a diagram showing the relationship between the observation target and the frame rate. The range of arrows in FIG. 3 indicates the range of frame rates suitable for the movement of the observed object. For example, as shown in FIG. 3, at a frame rate lower than the frame rate suitable for the movement of the observation target (for example, moving distance and moving speed), the movement of the observation target in the dynamic image becomes unnatural. Even when performing dynamic analysis, accurate analysis results cannot be obtained due to lack of information. On the other hand, at a frame rate higher than the frame rate suitable for the movement of the observation target, if the irradiation dose in each imaging of the dynamic imaging is constant, the patient will be wastedly exposed to radiation, which is not preferable. If the total exposure dose in dynamic imaging is constant, noise in individual frame images increases as the frame rate increases, affecting diagnosis and analysis results. In addition, at a frame rate higher than the frame rate suitable for the movement of the observation target, the amount of useless dynamic image data increases, and analysis processing and transfer take extra time. The extra data also puts pressure on the memory capacity. Furthermore, for example, when the object to be observed is the locomotor organ, there is a problem that the image is too fast and the observer is tired. Note that FIG. 3 shows the relationship between the type of observation target and the frame rate. Rates may vary.
Therefore, in the storage unit 22 of the console 2, the optimal frame rate for each observation object is obtained by experiment, and information on the observation object and the frame rate that can be handled by the imaging device 1 and the generation device 3 are selected for the observation object. It is stored in the frame rate selection table 221 in association with the optimum frame rate. As described above, the information about the observation target is information including at least one of patient information, the type of observation target, and the content of observation. If the movement distance, movement speed, and the like differ depending on the presence or absence of a disease and the observation content, it is preferable to associate an optimum frame rate with each combination of patient information, observation target type, and observation content.

FIG. 4 is a diagram showing an example of the frame rate selection table 221. As shown in FIG.
For example, if the object being observed is respiratory ventilation in an adult, respiratory motion typically moves the diaphragm (lower lung field) about 6 cm at a rate of about 3 cm/sec. In this case, the optimum frame rate is 7.5 fps, so in the frame rate selection table 221, information about the observation target (adult, respiratory, ventilation) and 7.5 fps are stored in association with each other.
Further, for example, when the observation target is the amount of movement of the shoulder joint of the locomotor system and the disease is observed by moving about 15 cm at a speed of about 15 cm/sec, the optimum frame rate is 6 fps. In 221, information about an observation target (movement amount of locomotor and shoulder joints) and 6 fps are associated and stored.
Also, for example, if the object to be observed is blood flow in the circulatory system of an adult, the blood flow generally moves about 1 cm at a speed of about 2 cm/second. In this case, the optimum frame rate is 15 fps, so in the frame rate selection table 221, the information about the observation target (adult, circulatory system, blood flow) and 15 fps are stored in association with each other.

The storage unit 22 also stores inspection order information transmitted from the RIS or the like.

The communication unit 23 is composed of a communication module and the like.
The communication unit 23 exchanges various signals and various data with other devices (image capturing device 1, generation device 3, motion analysis device 4, image management device 5, etc.) connected by wire or wirelessly via the communication network N. send and receive

The display unit 24 is configured by, for example, an LCD (Liquid Crystal Display), a CRT (Cathode Ray Tube), or the like. The display unit 24 displays a radiation image or the like according to the image signal received from the control unit 21 .

The operation unit 25 includes a keyboard (cursor keys, numeric input keys, various function keys, etc.), a pointing device (mouse, etc.), a touch panel laminated on the surface of the display unit 24, and the like. The operation unit 25 outputs a control signal to the control unit 21 according to the operation performed by the user.

The console 2 does not include the display unit 24 and the operation unit 25. For example, the console 2 receives control signals from an input device provided separately from the console 2 via the communication unit 23 or the like, or receives control signals from an input device provided separately from the console 2. An image signal may be output to a display device (monitor) provided.
Further, when another device (such as the image management device 5) has a display unit and an operation unit, it receives control signals from the operation unit of the other device and outputs image signals to the display unit of the other device. (the display unit and operation unit may be shared with other devices).

[2-2. Operation of console]
Next, operation of the console 2 will be described with reference to FIG.
The console 2 executes dynamic imaging control processing A shown in FIG. The dynamic imaging control process A is stored in the CPU and ROM of the control unit 21, for example, when examination order information for dynamic imaging is selected by the operation unit 25 from the examination list screen displayed on the display unit 24. This is done in collaboration with a program that

First, the control unit 21 acquires information about an observation target in dynamic imaging (step S1).
As described above, the information about the observation target includes at least one of patient information, observation target type, and observation content. In step S1, for example, patient information, the type of observation target, observation details, etc. are acquired from the examination order information. The type of observation target can be acquired from, for example, the department or imaging region of the examination order information. The observation content can be obtained, for example, from the analysis type of the inspection order information.

Next, the control unit 21 selects a frame rate to be used for dynamic imaging based on the acquired information regarding the observation target (step S2).
For example, the control unit 21 refers to the frame rate selection table 221 stored in the storage unit 22, and selects the acquired observation target information from among the plurality of types of frame rates that can be supported by the imaging device 1 and the generation device 3. (if there is no frame rate, for example, the closest frame rate) is selected as the frame rate to be used for dynamic imaging.

Next, the control unit 21 sets the imaging conditions of the dynamic image including the frame rate in the imaging device 1 and the generation device 3 (step S3).
For example, the control unit 21 sets the frame rate selected in step S<b>2 to the imaging device 1 and the generating device 3 . In addition, the control unit 21 automatically sets imaging conditions (image reading conditions, such as pixel size, image size, etc.) in the imaging device 1 based on the imaging region, imaging direction, etc. included in the examination order information. At the same time, imaging conditions (radiation irradiation conditions. For example, tube voltage (kV) of radiation source, tube current (mA), irradiation time (ms), etc.) are set in the generator 3 . Alternatively, the photographing conditions (image reading conditions) for photographing to be performed may be set in the photographing apparatus 1 according to the operation of the operation unit 25 by the user. Further, the radiation irradiation conditions may be set by the user from the operation panel of the generator 3 .

Here, the user (engineer) places the subject S between the radiation source 33 of the generator 3 and the imaging device 1 and performs positioning.
Then, when the user operates the irradiation instruction switch 32 , the generator 3 irradiates the imaging region of the subject S with the radiation R. As shown in FIG.
The imaging device 1 captures the dynamics of the imaging region at the timing of receiving the radiation R from the generator 3 to generate a dynamic image composed of a plurality of frame images, and transmits the dynamic image data to the console 2 .

When the dynamic image data is received (acquired) by the communication unit 23, the control unit 21 stores the acquired dynamic image data in the storage unit 22 (step S4), and displays the dynamic image based on the received dynamic image data. A preview is displayed on the unit 24 (step S5).
The user confirms the positioning, image quality, and the like from the displayed dynamic image, and determines whether an image suitable for diagnosis has been obtained by imaging (acquisition OK) or whether reimaging is necessary (imaging NG). Then, the operation unit 23 is operated to input the judgment result.

When a determination result indicating that photography is OK is input by a predetermined operation of the operation unit 25 (step S6; YES), the control unit 21 adds dynamic image data to each of the series of frame image data obtained by dynamic photography. Identification ID for identification, patient information, examination information (information such as imaging site, imaging direction, radiation irradiation conditions, image reading conditions, number indicating imaging order (frame number), clinical department, type of analysis, etc.) (for example, written in the header area of the image data in DICOM format), and transmitted to the dynamic analysis device 4 via the communication unit 23 (step S7). Note that if the type of analysis is not specified, the dynamic image data may be transmitted to the image management device 5 . Then, the dynamic imaging control process A ends.
On the other hand, when a judgment result indicating that shooting is NG is input by a predetermined operation of the operation unit 25 (step S6; NO), the control unit 21 deletes the series of frame images stored in the storage unit 22 (step S8). ), and the dynamic imaging control process A ends. In this case, re-shooting is required.

Upon receiving the dynamic image data from the console 2, the dynamic analysis device 4 performs analysis processing according to the type of analysis attached to the dynamic image data, and associates the analysis result with the dynamic image data and its incidental information. Send to the image manager 5 .
The image management device 5 stores and manages the received dynamic image data and analysis results in association with the incidental information.

As described above, according to the control unit 21 of the console 2, the information regarding the observation target in dynamic imaging is acquired, and the frame rate, which is one of the imaging conditions for the dynamic imaging, is set based on the acquired information regarding the observation target. select.
Therefore, since the frame rate for dynamic imaging can be set correctly according to the observation target, it is possible to perform correct diagnosis using dynamic images with stable performance.

[Second embodiment]
Next, a second embodiment of the invention will be described.
In the first embodiment, the case where the information about the observation target used for selecting the frame rate is information including at least one of patient information, observation target type, and observation content has been described. , the information about the observation target is the analysis value (moving speed of the attention area, moving distance of the attention area between predetermined frame images, attention a density change between predetermined frame images of a region, a density change speed of a region of interest, etc.) will be described.

In the second embodiment, the storage unit 22 stores a frame rate selection table (not shown). The frame rate selection table contains analytical values (moving speed of the region of interest, moving distance of the region of interest between frames, density change of the region of interest between frames, speed of density change of the region of interest, etc.) as information on the observation target in dynamic imaging. ) and the optimum frame rate for the analysis value are stored in association with each other.
Since other configurations of the system 100 in the second embodiment are the same as those described in the first embodiment, the description is incorporated, and the operation of the console 2 in the second embodiment will be described below.

In the second embodiment, the console 2 executes dynamic imaging control processing B shown in FIG. Dynamic imaging control processing B is stored in the CPU and ROM of the control unit 21, for example, when examination order information for dynamic imaging is selected by the operation unit 25 from the examination list screen displayed on the display unit 24. This is done in collaboration with a program that

First, the control unit 21 sets imaging conditions for dynamic imaging in the imaging device 1 and the generation device 3 (step S21).
For example, the control unit 21 automatically sets the imaging conditions (image reading conditions, such as pixel size, image size, frame rate, etc.) to the imaging device 1 based on the imaging region, imaging direction, etc. included in the examination order information. is set, and imaging conditions (radiation irradiation conditions such as radiation source tube voltage (kV), tube current (mA), irradiation time (ms), frame rate, etc.) are set in the generator 3 . Alternatively, the photographing conditions (image reading conditions) for photographing to be performed may be set in the photographing apparatus 1 according to the operation of the operation unit 25 by the user. Further, the radiation irradiation conditions may be set by the user from the operation panel of the generator 3 .

Here, the user (engineer) places the subject S between the radiation source 33 of the generator 3 and the imaging device 1 and performs positioning.
Then, when the user operates the irradiation instruction switch 32, dynamic imaging is started.
That is, the generator 3 irradiates the radiation R to the imaging region of the subject S. As shown in FIG.
The imaging device 1 captures the dynamics of the subject S at the timing of receiving the radiation R from the generator 3 , generates a dynamic image composed of a plurality of frame images, and transmits the dynamic image data to the console 2 .

When the acquisition (reception) of dynamic image data is started by the communication unit 23 (step S22), the control unit 21 acquires frame images for a predetermined period (for example, the first cycle of the dynamic image) obtained by the dynamic imaging. is used to perform a dynamic analysis to obtain an analysis value (step S23).
For example, by analyzing the frame images for a predetermined period, the movement speed of the attention area, the predetermined frame images of the attention area (for example, between adjacent frame images, every n frames (where n is a positive integer)) At least one of a moving distance (between images), a density change between predetermined frame images of the attention area, and a density change speed of the attention area is calculated as an analysis value. The region of interest is determined by, for example, the imaging region and the type of analysis target included in the examination order information (for example, if the imaging region is the chest and the type of analysis target is ventilation, the region of interest is the lung field, etc.). .

Next, the control unit 21 selects the frame rate used for dynamic imaging based on the analysis value obtained by the dynamic analysis (step S24).
The control unit 21 refers to the frame rate selection table stored in the storage unit 22, and analyzes the dynamic image of the subject S from among a plurality of types of frame rates that can be handled by the imaging device 1 and the generation device 3. The frame rate stored in association with the analysis value acquired by (if there is no frame rate, for example, the closest frame rate) is selected as the frame rate to be used for subsequent dynamic imaging.

Next, the control unit 21 determines whether or not the selected frame rate matches the frame rate currently set as the imaging condition (step S25).
If it is determined that the selected frame rate does not match the frame rate currently set as the imaging condition (step S25; NO), the control unit 21 changes the frame rate setting (step S26), and step Move to S27.
If it is determined that the selected frame rate matches the frame rate currently set as the imaging condition (step S25; YES), the control section 21 proceeds to step S27.

In step S27, the control unit 21 acquires the dynamic image data from the photographing device 1 through the communication unit 23 and stores it in the storage unit 22 (step S27), and displays the dynamic image based on the acquired dynamic image data on the display unit 24. A preview is displayed (step S28).
The user confirms the positioning, image quality, and the like from the displayed dynamic image, and determines whether an image suitable for diagnosis has been obtained by imaging (acquisition OK) or whether reimaging is necessary (imaging NG). Then, the operation unit 23 is operated to input the determination result.

When a determination result indicating that photography is OK is input by a predetermined operation of the operation unit 25 (step S29; YES), the control unit 21 adds dynamic image data to each of the series of frame image data obtained by dynamic photography. Identification ID for identification, patient information, examination information (information such as imaging site, imaging direction, radiation irradiation conditions, image reading conditions, number indicating imaging order (frame number), clinical department, type of analysis, etc.) (for example, written in the header area of the image data in DICOM format), and transmitted to the dynamic analysis device 4 via the communication unit 23 (step S30). Note that if the type of analysis is not specified, the dynamic image data may be transmitted to the image management device 5 . Then, the dynamic imaging control process B ends.
On the other hand, when a judgment result indicating that shooting is NG is input by a predetermined operation of the operation unit 25 (step S29; NO), the control unit 21 deletes the series of frame images stored in the storage unit 22 (step S31). ), the dynamic imaging control process B is terminated. In this case, re-shooting is required.

When the dynamic image data is received, the dynamic analysis device 4 performs analysis processing according to the type of analysis attached to the dynamic image data, associates the analysis result with the dynamic image data and its incidental information, and sends it to the image management device 5. Send to
The image management device 5 stores and manages the received dynamic image data and analysis results in association with the incidental information.

As described above, the control unit 21 of the console 2 acquires, as information about the observation target, an analysis value obtained by analyzing frame images for a predetermined period of the dynamic image acquired by dynamic photography of the subject S. , select the frame rate of the dynamic imaging based on the acquired analysis value.
Therefore, since the frame rate for dynamic imaging can be set correctly according to the observation target, it is possible to perform correct diagnosis using dynamic images with stable performance.

As described above, the first embodiment and the second embodiment according to the present invention have been described, but the present invention is not limited to the above-described embodiments and the like, and can be changed as appropriate without departing from the scope of the present invention. It goes without saying that

For example, in the above embodiment, the function of the dynamic imaging condition selection device of the present invention is installed in the console 2, but the function of the dynamic imaging condition selection device is installed in a device other than the console 2. It may be a dedicated device.

Further, acquisition of analysis values in the second embodiment may be performed by performing pre-imaging before main imaging and using dynamic image data obtained by the pre-imaging.

Further, for example, in the above description, an example using a hard disk, a semiconductor non-volatile memory, or the like is disclosed 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 applied. A carrier wave is also applied as a medium for providing program data according to the present invention via a communication line.

100 radiation imaging system 1 radiation imaging device 2 console (dynamic imaging condition selection device)
21 control unit 22 storage unit 23 communication unit 24 display unit 25 operation unit 3 radiation generator 31 generator 32 irradiation instruction switch 33 radiation source 4 image management device N communication network R radiation S subject

Claims (13)

A dynamic imaging condition selection device for selecting imaging conditions for dynamic imaging for imaging dynamics of a subject by sequentially irradiating the subject with radiation,
comprising a selection unit that selects a frame rate, which is one of the imaging conditions for dynamic imaging, based on information about an observation target in dynamic imaging;
A dynamic imaging condition selection device characterized by: 2. The dynamic imaging condition selection apparatus according to claim 1, wherein the information about the observation target includes at least one of patient information, a type of observation target, and observation details. 3. The dynamic imaging condition selection apparatus according to claim 2, wherein the patient information includes at least one of age, sex, and presence/absence of disease. 4. The dynamic imaging condition selection apparatus according to claim 2, wherein the type of observation target is information representing an organ system or part of the observation target. 5. The dynamic imaging condition selection apparatus according to claim 2, wherein the observation content includes at least one of ventilation, blood flow, and the amount of movement of a predetermined structure. 2. The dynamic imaging condition selection apparatus according to claim 1, wherein the information about the observation object is an analysis value obtained by analyzing a dynamic image obtained by dynamic imaging of the subject. A dynamic imaging condition selection program for selecting imaging conditions for dynamic imaging for imaging dynamics of a subject by sequentially irradiating the subject with radiation,
A dynamic imaging condition selection program for causing a computer to execute a process of selecting a frame rate, which is one of the imaging conditions for dynamic imaging, based on information about an observation target for dynamic imaging. 8. The dynamic imaging condition selection program according to claim 7, wherein the information about the observation target includes at least one of patient information, observation target type, and observation content. 9. The dynamic imaging condition selection program according to claim 8, wherein the patient information includes at least one of age, sex, and presence/absence of disease. 10. The dynamic imaging condition selection program according to claim 8, wherein the type of observation target is information representing an organ system or part of the observation target. 11. The dynamic imaging condition selection program according to any one of claims 8 to 10, wherein said observation content includes at least one of ventilation, blood flow, and the amount of movement of a predetermined structure. 8. The dynamic imaging condition selection program according to claim 7, wherein the information about the observation object is an analysis value obtained by analyzing a dynamic image obtained by dynamic imaging of the subject. A dynamic imaging condition selection method for selecting imaging conditions for dynamic imaging for imaging the dynamics of a subject by sequentially irradiating the subject with radiation,
A dynamic imaging condition selection method, comprising a step of selecting a frame rate, which is one of the imaging conditions for dynamic imaging, based on information about an observation target in dynamic imaging.

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