JP2022013681A - Dynamic quality control device, dynamic quality control program and dynamic quality control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable efficient quality control related to kymography in which radiation is sequentially applied.

SOLUTION: A dynamic quality control device 2 performs quality control related to kymography in which the dynamics of a subject S are photographed by sequentially irradiating the subject S with radiation R, and has quality control presentation means for presenting information regarding quality control. The information regarding quality control is information regarding an interval between frames generated based on a plurality of frames included in a dynamic image I obtained by the kymography (interval values, information on whether the interval value is included within a predetermined numerical range, information regarding the consistency of frame intervals at at least two timing of when the dynamic image I is generated, when the dynamic image I is transferred, when the dynamic image I is analyzed, and when the dynamic image I is saved, and information on whether or not the frame intervals are appropriate).

SELECTED DRAWING: Figure 4

COPYRIGHT: (C)2022,JPO&INPIT

Description

The present invention relates to a dynamic quality control device, a dynamic quality control program and a dynamic quality control method.

Conventionally, in radiographic photography of still images, various techniques for performing quality control related to photography have been proposed.
For example, Patent Document 1 describes a means for inputting image data recorded on a recording medium to be evaluated for quality or image data read by an image reading device to be evaluated for quality, and an image reading device to be evaluated for quality. A means for inputting device identification information for specifying a recording medium, a means for associating the input image data with quality evaluation identification information indicating that the data is for quality evaluation and input device identification information, and quality evaluation identification. Means for storing image data associated with information and device identification information, search for and read image data associated with quality evaluation identification information, and perform arithmetic processing for quality evaluation on the read image data for evaluation. A radiation image reading system including a means for acquiring a result and a means for outputting the acquired evaluation result in association with device identification information associated with image data is described.

In recent years, various devices for performing dynamic imaging to generate a dynamic image consisting of a plurality of frames by sequentially irradiating radiation have been developed.
For example, Patent Document 2 has a plurality of detection elements arranged in a two-dimensional shape, and a radiation detector that detects radiation pulsed by a radiation source in each of the plurality of detection elements and sequentially generates a frame image. And an analysis means for calculating the feature amount of the dynamics of the subject based on a plurality of frame images obtained by photographing the dynamics of the subject with a radiation source and a radiation detector, and a dynamic diagnosis support information generation system including. Has been done.

Japanese Unexamined Patent Publication No. 2008-283531 Japanese Unexamined Patent Publication No. 2012-110399

In dynamic photography, as with still image photography, having a certain level of quality prevents problems such as misdiagnosis by doctors, increased burden on engineers due to re-imaging, and increased exposure dose to subjects due to re-imaging. Desirable from the point of view.
However, since dynamic photography is a technology that has only just been used in the medical field, quality control related to dynamic photography has not been sufficiently researched and developed. Therefore, for example, most of the regular quality control after product delivery is performed manually and personally by a technician, but in dynamic photography, there is more information on quality control than in still image photography, so it is a business. Improvement of efficiency is desired.

An object of the present invention is to enable efficient quality control regarding dynamic imaging in which radiation is sequentially irradiated.

In order to solve the above problems, the dynamic quality control device according to the present invention is
It is a dynamic quality control device that performs quality control related to dynamic photography that photographs the dynamics of the subject by sequentially irradiating the subject with radiation.
It has a quality control presentation means for presenting information on the quality control, and has
The information regarding the quality control is characterized in that it is information regarding the interval of frames generated based on a plurality of frames included in the dynamic image obtained by the dynamic imaging.

In addition, the dynamic quality control program according to the present invention is
It is a dynamic quality control program that performs quality control related to dynamic photography that captures the dynamics of the subject by sequentially irradiating the subject with radiation.
Have the computer perform the process of presenting information about the quality control.
The information regarding the quality control is characterized in that it is information regarding the interval of frames generated based on a plurality of frames included in the dynamic image obtained by the dynamic imaging.

Further, the dynamic quality control method according to the present invention is:
It is a dynamic quality control method that performs quality control related to dynamic photography in which the dynamics of the subject are photographed by sequentially irradiating the subject with radiation.
It has a process of presenting information on the quality control.
The information regarding the quality control is characterized in that it is information regarding the interval of frames generated based on a plurality of frames included in the dynamic image obtained by the dynamic imaging.

According to the present invention, it is possible to efficiently perform quality control regarding dynamic imaging in which radiation is sequentially irradiated.

It is a block diagram which shows the radiological imaging system which concerns on embodiment of this invention. It is a block diagram which shows the dynamic quality control apparatus provided in the radiography system of FIG. It is a flowchart which shows the flow of the dynamic quality control processing executed by the dynamic quality control apparatus of FIG. It is a table which shows the information about the quality control which the dynamic quality control apparatus of FIG. 2 presents. It is a figure which shows an example of the defect which may occur in a dynamic image. It is a figure which shows other example of the defect which may occur in a dynamic image. It is a figure which shows other example of the defect which may occur in a dynamic image. It is a figure which shows an example of the screen which the dynamic quality control apparatus of FIG. 2 displays.

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.

<1. Radiation imaging system>
First, a schematic configuration of a radiography system (hereinafter, system 100) according to the present embodiment will be described.
FIG. 1 is a block diagram showing the system 100.

As shown in FIG. 1, the system 100 includes a radiation detector 1 and a dynamic quality control device (hereinafter, control device 2).
Further, the system 100 according to the present embodiment further includes a radiation generator 3, a console 4, and an optical camera 5.
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), the Internet, etc.).

The system 100 includes a hospital information system (HIS) (not shown), a radiological information system (RIS), a picture archiving and communication system (PACS), a dynamic analysis device, and the like. It may be possible to communicate with.

[1-1. Radiation generator]
The radiation generator 3 includes a generator 31, an irradiation instruction switch 32, and a radiation source 33.
The radiation generator 3 may be installed in the photographing room, or may be movable together with the console 4 or the like, which is called a round-trip car.

The generator 31 has preset shooting conditions (for example, conditions related to the subject S such as the shooting site, shooting direction, and physique, tube voltage, tube current, irradiation time, and current) based on the operation of the irradiation instruction switch 32. A voltage corresponding to the time product (conditions related to irradiation of radiation R such as mAs value) is applied to the radiation source 33 (tube).

When a voltage is applied from the generator 31, the radiation source 33 generates radiation R (for example, X-rays or the like) having a dose corresponding to the applied voltage.
Further, the radiation source 33 can move in the X-axis direction, the Y-axis direction orthogonal to the X-axis, and the Z-axis direction orthogonal to the X-axis and the Y-axis, and rotates in parallel with the Y-axis and the Z-axis. It is possible to change the direction of the irradiation port of radiation by rotating around the axis.

Further, the radiation generator 3 is adapted to generate radiation R in an manner corresponding to the form of the radiation image to be generated (still image, dynamic image composed of a plurality of frames).
In the case of a still image, the radiation R is irradiated only once for each pressing of the irradiation instruction switch 32.
In the case of a dynamic image, the irradiation of pulsed radiation R is repeated a plurality of times per predetermined time (for example, 15 times per second) for each pressing of the irradiation instruction switch 32, or the irradiation of radiation R is continued for a predetermined time. ..
That is, the "sequential irradiation of radiation" in the present invention includes continuous irradiation in which radiation is continuously irradiated and pulse irradiation in which radiation is intermittently irradiated or not.

[1-2. Radiation detector]
Although not shown, the radiation detector 1 has pixels having a two-dimensional shape (matrix shape) including a radiation detection element that generates a charge according to a dose by receiving radiation R and a switch element that stores and discharges the charge. ), A scanning circuit that switches on / off of each switch element, a read circuit that reads out the amount of charge emitted from each pixel as a signal value, and a radiation image from multiple signal values read by the read circuit. It is equipped with a control unit for generating the above, a communication unit for transmitting the generated radiographic image data and various signals to the outside, and receiving various information and various signals.

Then, the radiation detector 1 responds to the dose of the irradiated radiation R by accumulating / releasing the charge and reading the signal value in synchronization with the timing at which the radiation R is irradiated from the radiation generator 3. It is designed to generate radiographic images.
When a still image is generated, a radiation image is generated only once for each irradiation instruction switch 32 being pressed.
When generating a dynamic image, the generation of frames constituting the dynamic image is repeated a plurality of times (for example, 15 times per second) for each pressing of the irradiation instruction switch 32.

The radiation detector 1 may save and transfer the generated dynamic image in the form of image data, or display it on a display device connected to itself in real time. May be good.
An example of displaying in real time is, for example, fluoroscopy.

[1-3. console〕
The console 4 sets various imaging conditions (tube voltage, tube current, irradiation time (mAs value), imaging site, imaging direction, etc.) in at least one of the radiation detector 1 and the radiation generator 3.
The console 4 is composed of a PC, a dedicated device, and the like.
Further, the console 4 is adapted to set shooting conditions based on shooting order information acquired from another system (HIS, RIS, etc.) or an operation performed by a user (for example, a technician).

[1-4. Dynamic quality control device]
The management device 2 performs quality control related to dynamic photography.
"Dynamic photography" means irradiation of radiation R by a radiation generator 3, generation and transfer of a dynamic image by a radiation detector 1, transfer of a dynamic image between devices, analysis by a dynamic analysis device, and a data storage device (cloud server). , PACS, etc.) refers to a series of operations (program execution) of the system 100 including storage of dynamic images. The analysis by the dynamic analysis device includes, for example, a ventilation analysis for analyzing ventilation, a blood flow analysis for analyzing blood flow, and a structure for analyzing the movement of structures such as bones and internal organs for a dynamic image. There are object analysis and other analysis.
In addition, "quality control" includes the meaning of quality control (Quality Control) by regular quality check after product delivery, as well as quality assurance (Quality Assurance) at the time of product delivery.

The management device 2 is composed of a PC, a dedicated device, and the like.
Although FIG. 1 illustrates a system 100 in which the management device 2 and the console 4 are separately provided, the management device 2 and the console 4 may be integrated.
Further, when the system 100 includes a dynamic analysis device, a PACS, or the like (not shown), the management device 2 may be integrated with these devices.
The details of the management device 2 will be described later.

[1-5. Optical camera]
The optical camera 5 is for optically photographing the phantom F in parallel when performing radiographic imaging for obtaining a dynamic image of the phantom F for quality check.
When the phantom F is not used for the quality check (the quality check is performed using the dynamic image obtained by photographing the subject S), the optical camera 5 is unnecessary.

[1-6. Outline operation of radiography system]
The system 100 configured in this way operates as follows.
First, when the radiation generator 3 irradiates the diagnosis target site of the subject S located between the radiation source 33 of the radiation generator 3 and the radiation detector 1 arranged opposite to each other with the radiation R, the radiation generator 3 irradiates the diagnosis target site. The radiation detector 1 generates a radiation image (still image, moving image) showing a site to be diagnosed, and transmits the image data to at least one of the management device 2 and the console 4.
Upon receiving the image data, the management device 2 executes a dynamic quality control process (details will be described later) and transmits the image data to another data storage device.

<2. Details of dynamic quality control equipment>
Next, the details of the management device 2 included in the system 100 will be described.
FIG. 2 is a block diagram showing the control device 2, FIG. 3 is a flowchart showing the flow of dynamic quality control processing executed by the control device 2, FIG. 4 is a table showing information on quality control presented by the control device 2, FIGS. 5 to 5 to FIG. 7 is a diagram showing an example of a defect that may occur in a dynamic image, and FIG. 8 is a diagram showing an example of a screen displayed by the management device 2.

[2-1. Configuration of dynamic quality control equipment]
As shown in FIG. 2, the management device 2 includes a control unit 21, a storage unit 22, a communication unit 23, a display unit 24, and an operation unit 25.
Each part 21 to 25 is electrically connected by a bus or the like.

The control unit 21 is composed of a CPU (Central Processing Unit), a RAM (Random Access Memory), and the like.
Then, the CPU of the control unit 21 reads out various programs stored in the storage unit 22 and expands them in the RAM, executes various processes according to the expanded programs, and centrally controls the operation of each unit of the management device 2. It has become.

The storage unit 22 is composed of a non-volatile memory, a hard disk, or the like.
Further, the storage unit 22 stores various programs (including a dynamic quality control program) executed by the control unit 21, parameters necessary for executing the programs, and the like.
The storage unit 22 may be capable of storing image data of a radiographic image acquired from another device.

The communication unit 23 is composed of a communication module or the like.
Then, the communication unit 23 is connected to another device (radiation detector 1, console 4, etc.) by wire or wirelessly via a communication network N (LAN (Local Area Network), WAN (Wide Area Network), the Internet, etc.). ) And various signals and various data are sent and received.

The display unit 24 displays various screens used for the diagnosis of the user.
The display unit 24 is composed of, for example, an LCD (Liquid Crystal Display), an ELD (Electronic Luminescent Display), a CRT (Cathode Ray Tube), or the like.
Then, the display unit 24 is adapted to display a radiation image or the like corresponding to the image signal received from the control unit 21.

The operation unit 25 is an operation means configured to be operable by the user.
The operation unit 25 includes a keyboard (cursor key, number input key, various function keys, etc.), a pointing device (mouse, etc.), a touch panel laminated on the surface of the display unit 24, and the like.
Then, the operation unit 25 outputs a control signal corresponding to the operation performed by the user to the control unit 21.

The management device 2 does not include a display unit 24 and an operation unit 25, and may receive a control signal from an input device provided separately from the management device 2 via, for example, a communication unit 23, or may be connected to the management device 2. May output an image signal to a display device (monitor) provided separately.
Further, when another device (console 4, etc.) has a display unit and an operation unit, a control signal may be received from the operation unit of the other device, or an image signal may be output to the display unit of the other device. (The display unit and the operation unit may be shared with other devices).

[2-2. Operation of dynamic quality control device]
The control unit 21 of the management device 2 configured as described above executes the dynamic quality control process as shown in FIG. 3, for example, when the predetermined condition is satisfied.
The predetermined conditions include, for example, that the power of the management device 2 has been turned on, that image data has been acquired from another device, that a predetermined control signal has been received from the other device, and that the operation unit 25 has a predetermined operation. It includes what has been done.

In this dynamic quality control process, the control unit 21 first executes the acquisition process (step S1).
In this acquisition process, the control unit 21 acquires image data to be checked for quality.
The image data acquisition method includes reception via the communication unit 23, reading from the storage unit 22, reading from the medium, and the like.
When the dynamic quality control process is executed with the acquisition of image data as an opportunity, it is not necessary to execute this acquisition process.

Further, the image data acquired in this acquisition process may be an image obtained by photographing the actual subject S (medical image) or an image obtained by photographing the phantom F (medical image). It may be a quality check image).
The phantom F may be dedicated for evaluating the radiography system, or may be other than that.
In particular, the phantom F for dynamic photography may be anything as long as it operates periodically (for example, a clock, a metronome, etc.).

After acquiring the image data, the control unit 21 executes an analysis process related to quality control related to dynamic photography (step S2).
In this analysis process, the control unit 21 analyzes the acquired image data and extracts information on quality control related to dynamic photography.
The information regarding this quality control includes at least one of the first quality information regarding the dynamic image obtained by the dynamic photography and the second quality information regarding the function or operation of at least one of the devices used for the dynamic photography. include.
The information regarding quality control may include information regarding phantom F.

The first quality information includes at least one of information about the frame rate, information about the system sensitivity, and information about the image area.
The system sensitivity includes the detection sensitivity of the radiation detector 1, the output dose of the radiation generating unit, and the like.
The first quality information according to the present embodiment includes all of these information.
The first quality information is only information peculiar to the dynamic image (not in the still image), but the first quality information is information common to the still image (for example, dimensions, sharpness, linearity, etc.). Information on at least one of dynamic range, low contrast resolution, system sensitivity, uniformity, and erasability) may be included.

The second quality information includes at least one of information regarding the generation of the dynamic image, information regarding the transfer of the dynamic image, information regarding the analysis of the dynamic image, and information regarding the storage of the dynamic image.
The second quality information according to the present embodiment includes all of these information.
The information regarding the generation of the dynamic image includes information regarding imaging in which the radiation generator 3 irradiates radiation R to accumulate charges in the radiation detector 1 and information regarding reading of the radiation image by the radiation detector 1. ..
The information regarding the transfer of the dynamic image includes information regarding the transfer from the radiation detector 1 to the console 4, information regarding the transfer from the radiation detector 1 to the management device 2, information regarding the transfer from the console 4 to the management device 2, and the like. It may be separated.
In addition, the information regarding the storage of the dynamic image is also divided into the information regarding the storage in the radiation detector 1, the information regarding the storage in the console 4, the information regarding the storage in the management device 2, the information regarding the storage in other data storage devices, and the like. May be.

Information on quality control according to this embodiment includes vertical and horizontal items in a table (matrix) in which the first quality information is an item on the vertical axis and the second quality information is an item on the horizontal axis, as shown in FIG. 4, for example. It is information on intersecting squares.
Specifically, the information regarding quality control is, for example, at least one of the timings of image generation (shooting, image readout), image transfer, image analysis, and image storage. Includes analysis results in.
The analysis results include values for at least one of the frame rate, system sensitivity, and image area, information about whether the values are appropriate, information about the relationship with the values at one or more other timings, and so on. include.

In the analysis process according to the present embodiment, the control unit 21 first calculates at least one value among the frame rate, the system sensitivity, and the image area (step S21).

For example, when the second quality information includes information on the frame rate, the control unit 21 may use the time interval (generation time) of a plurality of (preferably all) frames in the dynamic image with the previous or subsequent frame. Difference) is calculated.

Further, when the second quality information includes information on the system sensitivity, the control unit 21 may use an index value indicating the sensitivity (for example, Detective quantum efficiency: or less) for a plurality of (preferably all) frames in the dynamic image. , DQE), signal-to-noise ratio, and at least one of the amounts of lag components in the signal value).
The control unit 21 may detect the presence or absence of artifact A instead of or together with the calculation of the index value.

When the second quality information includes information about an image region, the control unit 21 determines the position of the subject region in which the subject S is captured (coordinates of a specific pixel in the subject region) for a plurality of (preferably all) frames in the dynamic image. Etc.) is calculated.

Further, in the analysis process according to the present embodiment, the control unit 21 determines whether or not the calculated value is appropriate (step S22).

For example, when the calculated value is the frame interval, the control unit 21 compares the calculated value of each interval with the set value (the reciprocal of the frame rate), determines that it is appropriate if they match. If they do not match, it is judged to be inappropriate.
It should be noted that the calculated interval value does not have to completely match the set value. For example, if the calculated value is within the range of the set value ± α%, it may be regarded as matching. good.
This α may be appropriately adjusted by the user.

When the dynamic image of the phantom F is taken, the control unit 21 determines the operation of the phantom F in the dynamic image, the operation of the phantom F in the optical image obtained by optically photographing the phantom F with an accurate operation in advance, and the operation of the phantom F. If they match, it may be judged to be appropriate, and if they do not match, it may be judged to be inappropriate.
It should be noted that the movement of the phantom F in the dynamic image and the movement of the phantom F in the optical image do not have to be completely the same. If it is within the range of α%, it may be regarded as a match.
This α may be appropriately adjusted by the user.

Further, when it is determined that the operation of the phantom F in the dynamic image and the operation of the phantom F in the optical image match, but it is determined that the frame spacing of the dynamic image is not appropriate, the phantom F is used. It will be a defect.

When the calculated value is an index value indicating sensitivity, the control unit 21 compares the calculated index value of each frame with the index value of the previous or subsequent frame, and if they match, it is appropriate. Judge that there is, and if it does not match, it is judged that it is not appropriate.
It is not necessary that the index value of a certain frame completely matches the index value of the previous and next frames. For example, the index value to be compared is within the range of the index value ± α% of the previous and next frames. If so, it may be considered as a match.
This α may be appropriately adjusted by the user.
When the presence or absence of artifact A is detected, the control unit 21 determines whether or not the presence or absence of artifact A in the frame immediately before or after the index value of each frame has changed.

When the calculated value is the position of the subject area, the control unit 21 compares the position of the subject area in each frame with the position of the subject area in the previous or subsequent frame, and the deviation of the position is the reference value. If it is within the range of, it is judged to be appropriate, and if it is out of the range, it is judged to be inappropriate.
The reference value may be changed within the range of ± α%.
This α may be appropriately adjusted by the user.

Further, in the analysis process according to the present embodiment, the control unit 21 appropriately relates the values at at least two timings of image generation, image transfer, image analysis, and image storage. It is determined whether or not (consistency) is (step S23).

For example, when the calculated value is the frame interval, the frame rates (reciprocals of the calculated values) at at least two timings of generation, transfer, analysis, and storage of the dynamic image are compared and match. If it is appropriate, it is judged to be appropriate, and if it does not match, it is judged to be inappropriate.
The control unit 21 may be configured to compare the calculated value with the value set in the system 100 (value included in the header information of the dynamic image) and determine whether or not they match.

Further, in the analysis process according to the present embodiment, when the control unit 21 determines that the predetermined information among the information related to quality control is not appropriate, the control unit 21 extracts the confirmation item for the predetermined information.
As a result of analyzing the dynamic image I, for example, when at least one of the calculated frame interval values does not match the set value, the dynamic image I acquired in the acquisition process is the subject S (clock) shown in FIG. 5 (a). ) Is photographed normally, but includes a frame whose image timing is deviated (for example, the position of the hand H of the clock is deviated from the original position) as shown in FIG. 5 (b). , A frame including a frame in which the movement appears to be blurred (for example, a plurality of hands H of a clock appear to be gathered) as shown in FIG. 5 (c), or an operation in all frames as shown in FIG. 5 (c). It is often the one that is out of alignment.
As a cause for obtaining the dynamic image I as shown in FIG. 5B, for example, a reading failure of the radiation detector 1 or a malfunction of the phantom F can be considered.
Further, as a cause for obtaining the dynamic image I as shown in FIG. 5 (c), for example, an irradiation timing failure of the radiation generator 3 (for example, several shots in a certain pulse), a malfunction of the phantom F, or the like is considered. Be done.
Further, as a cause for obtaining the dynamic image I as shown in FIG. 5 (d), for example, a setting error of the devices 1 and 3 or a malfunction of the phantom F can be considered.

Therefore, as a result of the analysis, when it is found that the dynamic image I includes a frame whose image timing is deviated as shown in FIG. 5 (b), the control unit 21 performs a read operation of the radiation detector 1. At least one of whether or not it is normal and whether or not the operation of the phantom F is normal is extracted as a confirmation item.
Further, when the dynamic image I is found to include a frame in which the movement appears to be blurred as shown in FIG. 5 (c), the control unit 21 indicates whether the radiation irradiation operation of the radiation generator 3 is normal. At least one of whether or not and whether or not the operation of the phantom F is normal is extracted as a confirmation item.
Further, when the dynamic image I is out of operation in all the frames as shown in FIG. 5D, the control unit 21 determines whether or not the setting contents of the devices 1 and 3 are accurate. And at least one of whether or not the operation of the phantom F is normal is extracted as a confirmation item.

Further, when the index value indicating the calculated sensitivity does not match the index value of the preceding and following frames as a result of analyzing the dynamic image I, the dynamic image I acquired in the acquisition process is, for example, as shown in FIG. 6A. The signal value of each frame is changing (gradually lightening (darkening)), the SN value of each frame is changing (gradually blurring) as shown in FIG. 6 (b), or FIG. 6 ( In many cases, it includes a frame in which the artifact A appears, as shown in c).
Possible causes for obtaining the dynamic image I as shown in FIGS. 6A and 6B include a poor reading of the radiation detector 1, a poor irradiation of the radiation generator 3, a poor image correction, and the like.
Further, as a cause for obtaining the dynamic image I as shown in FIG. 6C, it is considered that the reading failure of the radiation detector 1 or the generation of artifact A due to the image correction failure is considered.

Therefore, as a result of the analysis, when it is found that the dynamic image I has a change in the signal value of each frame as shown in FIG. 6 (b), the control unit 21 controls the radiation generator 3. Whether or not the radiation irradiation operation (dose) of the radiation generator 3 is normal, the setting contents (mAs value, etc.) of the radiation generator 3, whether or not the read-out operation of the radiation detector 1 is normal, and the image correction device (radiation detection). At least one of whether or not the image correction processing of the device 1, the console 4, the analyzer, etc.) is normal is extracted as a confirmation item.
Further, when it is found that the SN value of each frame is changed in the dynamic image I as shown in FIG. 6 (b), the control unit 21 performs the radiation irradiation operation of the radiation generator 3. Whether the (dose) is normal, the setting contents of the radiation generator 3 (tube voltage, etc.), whether the read operation of the radiation detector 1 is normal, and the image correction process of the image correction device are normal. At least one of the presence or absence is extracted as a confirmation item.
Further, when the dynamic image I is found to include a frame in which the artifact A is captured as shown in FIG. 6C, the control unit 21 determines whether or not the reading operation of the radiation detector 1 is normal. , And at least one of whether or not the image correction process of the image correction device is normal is extracted as a confirmation item.

Further, as a result of analyzing the dynamic image I, when the calculated position of the subject area does not match the position of the front and rear frames, the dynamic image I acquired in the acquisition process is, for example, an image as shown in FIG. 7A. An image including a frame in which the upper part and the lower part are interchanged, a frame including a frame in which the entire image is displaced and a part of the image is cut off as shown in FIG. 7B, an image as shown in FIG. 7C. In many cases, the image includes a frame that is not dislocated but a part of the image is cut off, or a frame that has an aspect ratio of the image deviated as shown in FIG. 7 (d).
The cause of obtaining the dynamic image I as shown in FIG. 7A is considered to be a transfer failure between the devices, a storage failure of the data storage device, or the like.
The cause of obtaining the dynamic image I as shown in FIGS. 7 (b) and 7 (d) is considered to be a reading failure of the radiation detector 1, a storage failure of the data storage device, or the like.
Further, as a cause for obtaining the dynamic image I as shown in FIG. 7 (c), it is considered that the irradiation position of the radiation R is deviated.

Therefore, as a result of the analysis, when it is found that the dynamic image I includes a frame in which the upper part and the lower part of the image are interchanged as shown in FIG. At least one of whether or not the transfer operation of the data storage device is normal and whether or not the storage operation of the data storage device is normal is extracted as a confirmation item.
Further, as shown in FIGS. 7 (b) and 7 (d), the dynamic image I includes a frame in which the entire image is displaced and a part of the image is cut off, or a frame in which the aspect ratio of the image is displaced. When it is found that the image contains, the control unit 21 confirms at least one of whether the reading operation of the radiation detector 1 is normal and whether the saving operation of the data storage device is normal. Extract as an item.
Further, as shown in FIG. 7 (c), when the dynamic image I is found to include a frame in which the image is not deviated but a part of the image is cut off, the control unit 21 controls the radiation generator 3. The irradiation position of is extracted as a confirmation item.

The confirmation items may be extracted by referring to a table previously stored in the storage unit 22 showing the relationship between the analysis results and the confirmation items (possible causes), or by inputting the analysis results and confirming items. This may be performed by inputting the analysis result of this time into the trained model trained by machine learning with.
The control unit 21 serves as an analysis means by executing the analysis process described above.

After analyzing the quality of the dynamic photography, the control unit 21 executes the quality control presentation process (step S3).
In this quality control presentation process, the control unit 21 presents information regarding quality control to the user.
In the quality control presentation process according to the present embodiment, the control unit 21 presents information related to quality control by displaying it on the display unit 24.
The control unit 21 may transmit information related to quality control to another device (for example, a console 4 or the like) and display it on a display unit included in the other device.

In the quality control presentation process according to the present embodiment, the control unit 21 is requested to present the analysis result (value, value relevance, determination result of whether the value or relevance is appropriate, etc.) in the above analysis process. It has become.
Specifically, for example, it can be presented in the form of a table as shown in FIG.

In this quality control presentation process, the control unit 21 may present the analysis result at the time of the previous analysis to the user.
In that case, the control unit 21 may display the past analysis results including this time and the previous time as a graph G as shown in FIG. 8, for example.
By doing so, it is possible to easily confirm whether or not the state of the system 100 has changed between the previous quality check and the current quality check.

Further, in the above analysis process, when the analysis result that the predetermined information among the information related to the quality control is not appropriate is obtained, the control unit 21 is not appropriate in the quality control presentation process according to the present embodiment. Present the user with confirmation items for the information in.

In this quality control presentation process, the control unit 21 may present to the user the reason why the analysis result that the predetermined information is not appropriate is obtained.
Specifically, a frame having a different value (frame interval, DQE, position of subject area, etc.) from other frames, a frame number of this frame, and a text indicating how it differs from other frames (for example, "nth". And n + 1th frame interval reduction "etc.), a dynamic image I whose value is different from other timings, text indicating the timing when the value changes (for example," frame rate decrease at the time of transfer ", etc.) is displayed.

Further, when the analysis result that the information regarding the quality control is appropriate is obtained in the above analysis process, the control unit 21 indicates that the dynamic imaging is possible in the quality control presentation process according to the present embodiment. Present to.
In the quality control presentation process according to the present embodiment, the control unit 21 presents to the user that dynamic photography is possible when all the information related to quality control is appropriate.
By doing so, it is possible to prevent the user from performing dynamic photography when there is a problem in a part of the system 100.
Even if some of the information related to quality control is not appropriate, it is designed to show the user that dynamic photography is possible when the prescribed information is appropriate. May be good.
The control unit 21 serves as a quality control presentation means by executing the quality control presentation process described above.
Further, since the control unit 21 according to the present embodiment presents information related to quality control by displaying it on the display unit 24, the display unit 24 also forms a part of the quality control presentation means in the present embodiment.

<3. Effect>
As described above, the management device 2 according to the present embodiment or the system 100 including the management device 2 is adapted to present information on quality control to the user.
Therefore, according to the management device 2 or the system 100, quality control related to dynamic photography can be efficiently performed.

<4. Others>
Needless to say, the present invention is not limited to the above-described embodiment and the like, and can be appropriately modified without departing from the spirit of the present invention.

For example, the management device 2 or the system 100 according to the above embodiment only performs quality control related to dynamic photography, whereas the management device 2 or system 100 performs quality control related to still image photography and quality control related to dynamic photography. It may be designed to do both.
Further, the management device 2 according to the above embodiment is intended to execute the analysis process and the quality control presentation process, but when the system 100 includes the dynamic analysis device, the dynamic analysis process executes the analysis process, and the dynamic analysis process is executed. The management device 2 may execute the quality control presentation process based on the analysis result.

Further, for example, in the above description, an example in which a hard disk, a non-volatile memory of a semiconductor, or the like is used as a computer-readable medium of the program according to the present invention is disclosed, but the present invention is not limited to this example. As another computer-readable medium, a portable recording medium such as a CD-ROM can be applied. Further, a carrier wave is also applied as a medium for providing data of the program according to the present invention via a communication line.

100 Radiation imaging system 1 Radiation detector 2 Dynamic quality control 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 Console 5 Optical camera A Artifact F Phantom G Graph H Clock hands I Dynamic image N Communication network R Radiation S Subject / subject

Claims (14)

It is a dynamic quality control device that performs quality control related to dynamic photography that photographs the dynamics of the subject by sequentially irradiating the subject with radiation.
It has a quality control presentation means for presenting information on the quality control, and has
The dynamic quality control apparatus, characterized in that the information regarding the quality control is information regarding the interval between frames generated based on a plurality of frames included in the dynamic image obtained by the dynamic imaging. The dynamic quality control device according to claim 1, wherein the information regarding the frame interval is a value of the frame interval. The dynamic quality control device according to claim 2, wherein the information regarding the frame interval is information on whether or not the value of the frame interval is included in a predetermined numerical range. The information regarding the frame spacing is the consistency of the frame spacing at at least two timings of the generation of the dynamic image, the transfer of the dynamic image, the analysis of the dynamic image, and the storage of the dynamic image. The dynamic quality control apparatus according to any one of claims 1 to 3, which comprises information regarding the above. The dynamic quality control device according to any one of claims 1 to 4, wherein the information regarding the frame spacing is information on whether or not the frame spacing is appropriate. The dynamic quality control apparatus according to claim 5, wherein the quality control presenting means presents that dynamic imaging is possible when the frame spacing is appropriate. The dynamic quality control device according to claim 5 or 6, wherein the quality control presenting means presents a confirmation item when the frame spacing is not appropriate. The dynamic quality control apparatus according to claim 7, wherein the quality control presenting means presents a reason for obtaining an analysis result that is not appropriate. It is a dynamic quality control program that performs quality control related to dynamic photography that captures the dynamics of the subject by sequentially irradiating the subject with radiation.
Have the computer perform the process of presenting information about the quality control.
The quality control program is characterized in that the information regarding the quality control is information regarding the interval between frames generated based on a plurality of frames included in the dynamic image obtained by the dynamic imaging. The dynamic quality control program according to claim 9, wherein the information regarding the frame interval is a value of the frame interval. The dynamic quality control program according to claim 10, wherein the information regarding the frame interval is information on whether or not the value of the frame interval is included in a predetermined numerical range. It is a dynamic quality control method that performs quality control related to dynamic photography in which the dynamics of the subject are photographed by sequentially irradiating the subject with radiation.
It has a process of presenting information on the quality control.
The dynamic quality control method, characterized in that the information regarding the quality control is information regarding the interval between frames generated based on a plurality of frames included in the dynamic image obtained by the dynamic imaging. The dynamic quality control method according to claim 12, wherein the information regarding the frame interval is a value of the frame interval. The dynamic quality control method according to claim 13, wherein the information regarding the frame interval is information on whether or not the value of the frame interval is included in a predetermined numerical range.

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