阅读说明：本技术 动态分析系统、校正装置、程序以及动态拍摄装置 (Dynamic analysis system, correction device, program, and dynamic imaging device ) 是由 长束澄也 川名祐贵 于 2021-05-18 设计创作，主要内容包括：本发明提供动态分析系统、校正装置、程序以及动态拍摄装置。能够减轻拍摄动态图像的拍摄者和被拍摄的被拍摄体双方的负担,并且诊断者能够基于动态图像进行正确的诊断。动态分析系统(100)对通过进行与被拍摄体(S)的活动相关的动态拍摄而获取到的动态图像进行处理,在动态拍摄中,通过放射线照射装置(1)对被拍摄体(S)照射放射线(R)并由探测器(2)进行检测,动态分析系统(100)对动态图像进行针对被拍摄体(S)的与探测器平面(2a)垂直的方向上的活动的位置校正处理。(The invention provides a dynamic analysis system, a correction device, a program and a dynamic imaging device. The burden on both the photographer who photographs the moving image and the subject who is photographed can be reduced, and the diagnostician can make an accurate diagnosis based on the moving image. A dynamic analysis system (100) processes a dynamic image acquired by performing dynamic imaging relating to the movement of a subject (S), wherein in the dynamic imaging, a radiation irradiation device (1) irradiates the subject (S) with radiation (R) and a detector (2) detects the radiation, and the dynamic analysis system (100) performs position correction processing for the movement of the subject (S) in a direction perpendicular to a detector plane (2 a).)

1. A dynamic analysis system for processing a dynamic image acquired by performing dynamic imaging relating to the movement of a subject in which the subject is irradiated with radiation by a radiation irradiation apparatus and detected by a detector,

the moving image is subjected to position correction processing for a movement of the subject in a direction perpendicular to a detector plane.

2. The dynamic analysis system of claim 1,

in the position correction processing, the following processing is also performed:

identifying a specific region in each frame constituting the moving image, in which the subject is present,

the sizes of the identified specific regions are respectively determined,

based on the measured size of the specific region, the image reflected in one of the frames is enlarged or reduced so that the size of the specific region in one of the frames approaches the size of the specific region in another of the frames serving as a reference.

3. The dynamic analysis system of claim 1,

a radiation source that generates the radiation is configured to be movable in a direction perpendicular to the detector plane,

in the position correction process, in the above-described position correction process,

moving the radiation source from the detector plane to a first position separated by a first distance in a direction perpendicular to the detector plane and to a second position separated by a second distance greater than the first distance during imaging of the subject,

identifying a specific region in each frame constituting the moving image, in which the subject is present,

generating an interpolated frame in which the specific region is mapped in a case where the radiation source is located at an infinite distance from the detector plane, based on the specific region in the frame generated when the radiation source is located at the first position and the specific region in the frame generated when the radiation source is located at the second position,

replacing a frame in the dynamic image generated when the radiation source is located at the second position with the interpolated frame.

4. The dynamic analysis system of claim 3,

the dynamic analysis system includes a monitoring unit that monitors presence or absence of displacement of the subject in a direction perpendicular to the probe plane,

when the monitoring unit detects a displacement of the subject in a direction perpendicular to the detector plane, the radiation source is moved to the second position.

5. The dynamic analysis system of any one of claims 1 to 4,

the motion analysis system further includes a storage unit that stores the motion image corrected in the position correction processing.

6. The dynamic analysis system of any one of claims 1 to 5,

the dynamic analysis system further includes a display unit that displays the dynamic image corrected in the position correction processing.

7. The dynamic analysis system of any one of claims 1 to 6,

the subject is a marker attached to a specific part or the vicinity of the specific part.

8. The dynamic analysis system of claim 7,

the specific part is a joint.

9. A correction device processes a moving image acquired by performing moving imaging relating to movement of a subject in which the subject is irradiated with radiation by a radiation irradiation device and detected by a detector,

the moving image is subjected to position correction processing for a movement of the subject in a direction perpendicular to a detector plane.

10. A program executed by a control section of a correction device that processes a moving image acquired by performing moving imaging relating to movement of a subject in which the subject is irradiated with radiation by a radiation irradiation device and detected by a detector, wherein,

the moving image is subjected to position correction processing for a movement of the subject in a direction perpendicular to a detector plane.

11. The program according to claim 10, wherein,

in the position correction processing, the following processing is also performed:

identifying a specific region in each frame constituting the moving image, in which the subject is present,

the sizes of the identified specific regions are respectively determined,

based on the measured size of the specific region, the image reflected in one of the frames is enlarged or reduced so that the size of the specific region in one of the frames approaches the size of the specific region in another of the frames serving as a reference.

12. The program according to claim 10, wherein,

in the position correction processing, the following processing is also performed:

moving a radiation source configured to be movable in a direction perpendicular to the detector plane from the detector plane to a first position separated by a first distance in the direction perpendicular to the detector plane and to a second position separated by a second distance greater than the first distance while imaging the subject,

identifying a specific region in each frame constituting the moving image, in which the subject is present,

generating an interpolated frame in which the specific region is mapped in a case where the radiation source is located at an infinite distance from the detector plane, based on the specific region in the frame generated when the radiation source is located at the first position and the specific region in the frame generated when the radiation source is located at the second position,

replacing a frame in the dynamic image generated when the radiation source is located at the second position with the interpolated frame.

13. The program according to claim 12, wherein,

performing a monitoring process of monitoring presence or absence of displacement of the subject in a direction perpendicular to the probe plane,

the following processing is also performed: when the displacement of the subject in the direction perpendicular to the detector plane is detected in the monitoring process, the radiation source is moved to the second position.

14. The program according to any one of claims 10 to 13,

a saving process of saving the moving image corrected in the position correction process is also performed.

15. The program according to any one of claims 10 to 14,

display processing of displaying the moving image corrected in the position correction processing is also performed.

16. The program according to any one of claims 10 to 15,

the subject is a marker attached to a specific part or the vicinity of the specific part.

17. The program according to claim 16, wherein,

the specific part is a joint.

18. A dynamic imaging apparatus for detecting radiation irradiated to an object by a radiation irradiating apparatus with a detector to obtain a dynamic image relating to movement of the object,

the dynamic camera has a clamp that limits movement in a direction perpendicular to the detector plane.

19. The dynamic camera according to claim 18, wherein,

the jig has a restricting surface provided in parallel with the probe plane at a position where the subject comes into contact during imaging.

20. The dynamic camera according to claim 18, wherein,

the jig is a jig for holding a portion connected to the subject during shooting.

21. The dynamic camera according to claim 18, wherein,

the clamp includes an elastic member that expands and contracts as the subject moves parallel to the probe plane.

Technical Field

The invention relates to a motion analysis system, a correction device, a program, and a motion capture device.

Background

In the conventional technique, distortion of an image and a deviation of an effective field of view are corrected in photographing a fluoroscopic image.

For example, patent document 1 describes an X-ray diagnostic apparatus including: an X-ray tube; an X-ray fluoroscopic image detector; and an image display unit that displays the X-ray fluoroscopic image detected by the X-ray fluoroscopic image detector, obtains an image magnification of the X-ray fluoroscopic image projected onto an X-ray sensor of the X-ray fluoroscopic image detector, specifies an arbitrary point on the X-ray fluoroscopic image displayed on a screen of the image display unit, calculates an actual size on the subject corresponding to a distance between two specified points on the transmission X-ray image based on the obtained image magnification and positional information of the two specified points, and displays the calculated size.

In long-size imaging, the magnification of the subject at the overlapping portion of the combined radiographic images has also been conventionally corrected.

For example, patent document 2 describes an X-ray imaging apparatus including: an X-ray tube; an X-ray detector; an X-ray tube driving unit which rotates and moves the X-ray tube in order to change the irradiation angle of the X-ray; a control unit for performing drive control on the X-ray tube drive unit; an image generation unit that generates a captured image of the subject based on the transmission X-ray signal; and an image correction unit that reduces or enlarges a captured image captured at the rotation angle according to a magnification corresponding to the rotation angle of the X-ray tube.

Patent document 1: japanese laid-open patent publication No. 11-099142

Patent document 2: japanese patent laid-open publication No. 2010-172416

However, in the imaging of a moving image, the diagnosis target region is inevitably displaced in a direction (hereinafter, orthogonal direction) perpendicular to the detector plane of the detector (radiation detector) by the movement of the imaged subject (for example, in the case of imaging the pelvis when standing or sitting, the knee when moving up and down, or the like).

Even when an image is taken of a motion that does not cause a displacement in the orthogonal direction, the diagnostic target portion may be inevitably displaced in the orthogonal direction due to, for example, shaking of the subject (especially, elderly person) or generation of power by the motion.

Such displacement in the orthogonal direction is expressed in the radiographic image as a change in the size of the diagnostic region.

If the size of the part to be diagnosed differs from frame to frame, it is difficult for the diagnostician (doctor) to accurately diagnose the part to be diagnosed. As a result, the diagnostician may make a wrong diagnosis and a wrong treatment (e.g., selection of an artificial bone).

In addition, depending on the imaging operation (for example, standing movement in a loaded state), it may be difficult for the object (especially, elderly person) to move without shaking.

In such imaging, an imaging person (technician) needs to take an image while paying attention to prevent the subject from shaking. When the subject shakes, the image is re-captured after the image capture is completed.

On the other hand, it is painful for the subject to continue the motion without shaking. Further, when the subject is shaken halfway and is photographed again, the exposure amount of the subject increases.

In other words, the shooting of the motion that is likely to shake is a large burden on both the photographer and the subject.

Disclosure of Invention

The present invention has been made in view of the above-described problems, and an object of the present invention is to reduce the burden on both the photographer who photographs a moving image and the subject, and to enable the diagnostician to make an accurate diagnosis based on the moving image.

In order to solve the above problem, a motion analysis system according to the present invention processes a motion image acquired by performing motion imaging relating to motion of an object, in which the object is irradiated with radiation by a radiation irradiation device and detected by a detector, wherein the motion image is subjected to position correction processing for motion of the object in a direction perpendicular to a detector plane.

In the correction device of the present invention, a moving image acquired by performing moving imaging relating to movement of an object, in which the object is irradiated with radiation by a radiation irradiation device and detected by a detector, is processed, and position correction processing for movement of the object in a direction perpendicular to a detector plane is performed on the moving image.

In addition, the program of the present invention is executed by a control unit of a correction device that processes a moving image acquired by performing moving imaging relating to movement of a subject, wherein in the moving imaging, the subject is irradiated with radiation by a radiation irradiation device and detected by a detector, and wherein position correction processing for movement of the subject in a direction perpendicular to a detector plane is performed on the moving image.

In the motion picture taking apparatus according to the present invention, the detector detects the radiation irradiated to the subject by the radiation irradiating device, and obtains the motion picture relating to the movement of the subject, wherein the motion picture taking apparatus includes a jig which restricts the movement in the direction perpendicular to the plane of the detector.

According to the present invention, it is possible to reduce the burden on both the photographer who photographs a moving image and the subject who is photographed, and the diagnostician can make an accurate diagnosis based on the moving image.

Drawings

Fig. 1 is a block diagram showing a dynamic analysis system according to an embodiment of the present invention.

Fig. 2 is a diagram illustrating an example of the movement of the subject.

Fig. 3 is a diagram showing another example of the movement of the subject.

Fig. 4 is a block diagram showing a correction device provided in the dynamic analysis system of fig. 1.

Fig. 5 is a flowchart showing a flow of the position correction process executed by the correction device included in the dynamic analysis system according to the first embodiment.

Fig. 6 is a diagram showing an operation performed when the dynamic analysis system according to the second embodiment performs imaging.

Fig. 7 is a flowchart showing a flow of the position correction process executed by the correction device included in the dynamic analysis system according to the second embodiment.

Fig. 8 is a conceptual diagram of interpolation processing performed in the position correction processing of fig. 7.

Fig. 9 is a diagram illustrating an example of a method for imaging a subject.

Fig. 10 is a diagram showing another example of a method for imaging a subject.

Fig. 11 is a diagram showing another example of a method for imaging a subject.

Description of reference numerals: 100. 100A … dynamic analysis system; 1 … radiation irradiation device; 11 … electric generator; 12 … illumination indication switch; 13 … radiation source; 2 … detector; 2a … detector plane; 3. 3a … calibration device; 31 … control part; a 32 … communication section; 33. 33a … storage section; 34 … display part; 35 … an operation part; 4 … console; 5. 5A, 5B … clamps; a 51 … restriction; 51a … limiting surface; a … first position; b … second position; j. the design is a square₁… hand joint (specific part); j. the design is a square₂… knee joint (specific part); j. the design is a square₃… hip joint (specific site); j. the design is a square₄… shoulder joint; an N … communications network; r … radiation; s … shows the subject.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the scope of the present invention is not limited to the contents described in the following embodiments and drawings.

< first embodiment >

First, a first embodiment of the present invention will be explained.

[ dynamic analysis System ]

First, a schematic configuration of a dynamic analysis system (hereinafter, system 100) according to the present embodiment will be described. Fig. 1 is a block diagram showing a system 100, and fig. 2 and 3 are diagrams showing an example of an operation of a subject S.

Note that, in fig. 1, the reference numerals with parentheses are those of the second embodiment described later.

As shown in fig. 1, the system 100 includes a radiation irradiation device 1, a detector 2 (radiation detector), and a correction device 3.

The system 100 of the present embodiment further includes a console 4.

The devices 1 to 4 can communicate with each other via a communication Network N (LAN (Local Area Network), WAN (Wide Area Network), Network, or the like), for example.

The System 100 may be capable of communicating with a Hospital Information System (HIS), a Radiology Information System (RIS), an image saving and Communication System (PACS), and the like, which are not shown.

(radiation irradiating device)

The radiation irradiation device 1 includes a generator 11, an irradiation instruction switch 12, and a radiation source 13.

The radiation irradiation device 1 may be installed in an imaging room, or may constitute a movable device called a medical cart together with the console 4 and the like.

The generator 11 applies a voltage corresponding to a preset imaging condition (for example, a condition related to the subject S such as an imaging region, an imaging direction, and a physique, or a condition related to the irradiation of the radiation R such as a tube voltage, a tube current, an irradiation time, and a current time product (mAs value)) to the radiation source 13 (tube bulb) based on the operation of the irradiation instruction switch 12.

When a voltage is applied from the generator 11, the radiation source 13 generates radiation R (for example, X-rays) of a dose corresponding to the applied voltage.

The radiation source 13 is movable in an X-axis direction, a Y-axis direction orthogonal to the X-axis, and a Z-axis direction orthogonal to the X-axis and the Y-axis, and is rotatable about a rotation axis parallel to the Y-axis and the Z-axis to change the direction of the radiation irradiation port.

The radiation irradiation device 1 is configured as described above, and generates radiation R in accordance with an imaging format (still image imaging, moving image imaging).

The radiation irradiation device 1 can irradiate an arbitrary portion (for example, a bone, a joint, or the like) of the subject S in an arbitrary body position (a standing position, a lying position, a sitting position, or the like) with the radiation R so that an irradiation direction (a direction in which an optical axis of the radiation extends) forms an arbitrary angle with respect to a horizontal plane and a vertical line.

(Detector)

Although not shown, the probe 2 includes: a sensor substrate having a detector plane 2a (imaging surface, radiation incident surface, etc.) in which pixels having a radiation detection element that generates charges corresponding to the amount of radiation R by receiving the radiation R and a switching element that accumulates and releases the charges are arranged two-dimensionally (in a matrix); a scanning circuit for switching on/off of each switching element; a readout circuit that reads out an amount of electric charge discharged from each pixel as a signal value; a control section for generating a radiation image from the plurality of signal values read out from the readout circuit; and a communication unit for transmitting data of the generated radiographic image, various signals, and the like to the outside, or receiving various information and various signals.

The detector 2 accumulates and discharges electric charges and reads signal values in synchronization with the timing of irradiation of the radiation R from the radiation irradiation device 1, thereby generating a radiation image corresponding to the dose of the irradiated radiation R.

Particularly, when the operation of the subject S is imaged, the accumulation and release of electric charges and the reading of signal values are repeated a plurality of times in a short time (for example, 15 times in 1 second), thereby generating a moving image composed of a plurality of frames.

That is, the probe 2 constitutes a moving image generating unit.

As shown in fig. 2 and 3, the detector plane 2a can be disposed on an extension of the irradiation direction of the radiation R with the subject S therebetween, with respect to the radiation R irradiated in an arbitrary direction.

The probe 2 may be disposed by itself or may be supported by an imaging table or the like, not shown.

(correction device)

The correction device 3 constitutes a correction unit, and thus is constituted by a PC, a dedicated device, or the like.

The details of the correction device 3 will be described later.

(control console)

The console 4 is constituted by a PC, a dedicated device, and the like.

The console 4 can set various imaging conditions (tube voltage, tube current, irradiation time (mAs value), imaging region, imaging direction, and the like) in the imaging device and the like based on imaging command information acquired from another system (HIS, RIS, and the like) and user operation.

In fig. 1, the system 100 including the correction device 3 separately from the console 4 is illustrated, but the console 4 may be integrated with the correction device 3.

(schematic operation of dynamic analysis System)

In the system 100 configured as described above, the radiation source 13 of the radiation irradiation device 1 and the detector 2 are disposed to face each other with a gap therebetween, and the radiation R is irradiated from the radiation source 13 to the subject S disposed therebetween, whereby the subject S can be radiographed (a radiation image corresponding to the radiation R transmitted through the subject S is generated).

When an object in a stationary state is imaged, irradiation of radiation R and generation of a radiographic image are performed once in each imaging operation (depression of the irradiation instruction switch 12), and when a motion of the object is imaged, irradiation of pulsed radiation R and generation of frames are repeated a plurality of times in a short time in each imaging operation.

(object to be imaged in motion analysis System)

The correction device 3 operates to correct displacement in a direction perpendicular to the probe plane during the motion of the subject S in the moving image generated by the probe 2.

Therefore, the system 100 of the present embodiment is suitable for imaging the motion of the subject S in which the subject S is displaced in the direction perpendicular to the probe plane 2 a.

In such a case, the subject S is, for example, a marker attached to a specific part or the vicinity of the specific part.

The specific parts are bones, joints, vertebras and the like.

The hand joint J shown in fig. 2, for example, is included in the movement of the subject S, in which the subject S is displaced in the direction perpendicular to the probe plane 2a₁Stretching and bending motions (motions when throwing a dart).

In this operation, the hand joint J is involved₁The hand is swung by stretching and bending, but at this time, the forearm is displaced in the direction of swinging the hand by the power of swinging the hand, and as a result, the hand joint J₁And sometimes also with the forearm. If the direction of waving the hand is a direction perpendicular to the probe plane 2a, the hand joint J₁Also in a direction perpendicular to the detector plane 2 a.

In addition, in the movement of the subject S in which the subject S is displaced in the direction perpendicular to the probe plane 2a, for example, the knee joint J shown in fig. 3 is included₂Hip joint J₃Stretching, bending (from the action of standing or sitting in the chair).

These movements are accompanied by the knee joint J₂Hip joint J₃Stretching and bending, up-and-down movement of the thigh and trunk, but at this time, the hip joint J₃Is displaced between the side of the knee (position (a) in fig. 3) and the upper side (position (c) in fig. 3). At this time, if the subject faces in a direction perpendicular to the probe plane 2a, the hip joint J₃Displaced in a direction perpendicular to the detector plane 2 a.

Further, as shown in fig. 3 (b), the balance is obtained by tilting the lower leg part in the middle of the standing or sitting (while the waist is lifted from the chair), and as a result, the knee joint J is formed₂And may be displaced in a direction in which the lower leg portion is inclined.

In addition, the knee joint J may be swung due to loss of balance in the middle of standing or sitting movements₂And (4) displacing.

If the direction of the leg is inclined orThe direction of the rocking is perpendicular to the plane 2a of the detector, the knee joint J₂Also in a direction perpendicular to the detector plane 2 a.

[ correcting device ]

Next, a specific configuration of the correction device 3 included in the system 100 will be described.

Fig. 4 is a block diagram showing the correction device 3, and fig. 5 is a flowchart showing a flow of the position correction process executed by the correction device 3.

Note that, in fig. 4, the reference numerals with parentheses are those of the second embodiment described later.

(Structure of correction device)

As shown in fig. 4, the correction device 3 includes a control unit 31, a communication unit 32, and a storage unit 33.

The correction device 3 of the present embodiment further includes a display unit 34 and an operation unit 35.

The parts 31 to 35 are electrically connected by a bus or the like.

The control Unit 31 is constituted by a CPU (Central Processing Unit), a RAM (Random Access Memory), and the like.

The CPU of the control unit 31 reads out various programs stored in the storage unit 33, develops the programs in the RAM, and executes various processes based on the developed programs, thereby collectively controlling the operations of the respective units of the correction device 3.

The communication unit 32 is constituted by a communication module and the like.

The communication unit 32 transmits and receives various signals and various data to and from other devices (for example, the probe 2, the console 4, and the like) connected via the communication network N.

The correction device 3 may include a reading unit capable of reading the content stored in the storage medium, instead of the communication unit 32, and may acquire various data using the storage medium.

The storage unit 33 is constituted by a nonvolatile semi-dynamic memory, a hard disk, or the like.

The storage unit 33 stores various programs (including position correction processing described later) executed by the control unit 31, parameters necessary for executing the programs, and the like.

Further, the storage unit 33 may be capable of storing a radiation image.

The Display unit 34 is constituted by a monitor for displaying an image, such as an LCD (Liquid Crystal Display) or a CRT (Cathode Ray Tube).

The display unit 34 displays various images and the like based on a control signal input from the control unit 31.

The operation unit 35 of the present embodiment is constituted by a keyboard and a pointing device such as a mouse, each of which includes a cursor key, a numeric input key, various function keys, and the like, and a touch panel laminated on the surface of the display unit 34.

The operation unit 35 outputs a control signal corresponding to an operation performed by the user to the control unit 31.

At least one of the display unit 34 and the operation unit 35 may be shared with the console 4.

(operation of the correction device)

The control unit 31 of the correction device 3 configured as described above has the following functions.

Position correction function

For example, the control unit 31 executes the position correction processing shown in fig. 5, for example, when a predetermined condition is satisfied.

The "predetermined condition" includes, for example, conditions such as power-on, connection to the communication network N, predetermined start operation of the operation unit 35, and reception of a predetermined control signal from another device by the communication unit 32.

In the position correction processing, first, the control unit 31 executes acquisition processing (step S1).

In this acquisition process, the control unit 31 acquires a moving image showing the movement of the subject S from another device (the probe 2, the console 4, and the like).

The control unit 31 of the present embodiment acquires a moving image by receiving data via the communication unit 32.

In addition, the data may be obtained by reading data stored in the storage medium.

The control unit 31 may start the position correction process when the moving image is acquired. In this case, in the position correction processing, the acquisition processing need not be executed.

The control unit 31 constitutes an acquisition unit by executing the acquisition processing described above.

After acquiring the moving image, the control section 31 executes recognition processing (step S2).

In this recognition process, the control unit 31 recognizes a specific region in which the subject S is reflected in each frame constituting the moving image.

The method of identifying the specific region may be any of various conventionally known techniques.

The control unit 31 constitutes the recognition means by executing the recognition processing described above.

After identifying the specific area of the frame, the control unit 31 executes the measurement process (step S3).

In this measurement process, the control unit 31 measures the size of the identified specific region of each frame.

The size may be measured by various conventionally known techniques.

The control unit 31 constitutes the measurement unit by executing the measurement processing described above.

After measuring the size of the specific area of the frame, the control unit 31 executes the size change process (step S4) and ends the position correction process.

In the size change process, the control unit 31 enlarges or reduces the image reflected in one frame so that the size of the specific region in one frame approaches the size of the specific region in another frame serving as a reference, based on the measured size of the specific region.

In the size change processing of the present embodiment, the image is enlarged or reduced so that the size of all the specific regions reflected in each frame becomes uniform (falls within a predetermined range).

The size of all the specific regions is made uniform, and correction is performed so that the displacement in the direction perpendicular to the probe plane 2a during the movement of the subject S is eliminated.

The control unit 31 constitutes a size changing means by executing the size changing process described above.

Saving function

The control unit 31 of the present embodiment has a function of storing the moving image corrected in the position correction processing.

Specifically, the control unit 31 stores (stores in the storage unit 33) at least a part of the frames in the moving image corrected in the position correction processing.

The control unit 31 of the present embodiment stores all frames.

The control unit 31 may store the moving image in the position correction process.

The control unit 31 may transmit and store the moving image to another device (the console 4, a server not shown, or the like) having a storage unit, instead of storing the moving image in the storage unit 33.

The control unit 31 and the storage unit 33 constitute storage means by having such a storage function.

Display function

The control unit 31 of the present embodiment has a function of causing the display unit 34 to display the moving image corrected in the position correction processing.

The control unit 31 and the display unit 34 constitute a display unit by having such a display function.

[ Effect ]

In the system 100 according to the present embodiment described above, the correction device 3 corrects the displacement in the direction perpendicular to the probe plane 2a during the movement of the subject S by matching the size of the specific region reflecting the subject S in each frame of the moving image.

Therefore, according to the system 100, it is possible to reduce the burden on both the photographer who photographs a moving image and the subject who is photographed, and the diagnostician can make an accurate diagnosis based on the moving image.

< second embodiment >

Next, a second embodiment of the present invention will be explained.

Here, the same components as those of the first embodiment are denoted by the same reference numerals, and descriptions thereof are omitted.

[ dynamic analysis System ]

First, differences of the dynamic analysis system (hereinafter, system 100A) according to the present embodiment from the system 100 according to the first embodiment will be described.

The system 100A includes an optical camera not shown.

The contents of the processing executed by the correction device 3A of the system 100A (the program stored in the storage unit 33A) are different from those of the correction device 3 of the first embodiment.

The correction device 3A is common to the correction device 3 of the first embodiment described above in that it operates to correct displacement in the direction perpendicular to the probe plane during the motion of the subject S in the moving image. However, the specific method of this correction is different from the correction device 3 of the first embodiment described above.

[ correcting device ]

Next, differences from the correction device 3 of the first embodiment will be described with respect to the control performed by the correction device 3A.

Fig. 6 is a diagram showing an operation performed when the motion analysis system of the second embodiment performs imaging, fig. 7 is a flowchart showing a flow of position correction processing performed by a correction device included in the motion analysis system of the second embodiment, and fig. 8 is a conceptual diagram of interpolation processing performed in the position correction processing.

Position control function

The control unit 31 of the correction apparatus 3A executes the position control process when, for example, the interlock of the radiation irradiation apparatus 1 is released, the irradiation instruction switch 12 is operated, or the like.

In the position control process, for example, as shown in fig. 6, while the subject S is imaged, the control unit 31 moves the radiation source 13 from the detector plane 2a to a first position a separated by a first distance in a direction perpendicular to the detector plane 2a and a second position B separated by a second distance greater than the first distance.

In the control processing of the present embodiment, the control unit 31 monitors the presence or absence of displacement of the subject S in the direction perpendicular to the probe plane 2a based on the optical image captured by the optical camera, and moves the radiation source 13 to the second position B when detecting displacement of the subject S in the direction perpendicular to the probe plane 2 a.

The control unit 31 constitutes a monitoring means and a movement control means by executing the above-described position control processing. That is, when the subject S is displaced in the direction perpendicular to the probe plane 2a during imaging, the control unit 31 generates a moving image in which a frame generated when the radiation source 13 is located at the first position a and a frame generated when the radiation source is located at the second position B are mixed.

Position correction function

When the predetermined condition is satisfied, the control unit 31 executes, for example, the position correction process shown in fig. 7.

The "predetermined condition" is the same as in the first embodiment.

In the position correction processing, the control unit 31 first executes acquisition processing (step S1), and then executes recognition processing (step S2).

The contents of the acquisition processing and the recognition processing and their deformation modes are the same as those of the first embodiment described above.

After identifying the specific area of the frame, the control section 31 performs interpolation processing (step S3A).

In this interpolation process, as shown in fig. 8, the control unit 31 generates an interpolation frame based on a specific area in a frame generated when the radiation source is located at the first position a and a specific area in a frame generated when the radiation source is located at the second position B.

The interpolated frame is a frame in which a specific area is reflected in a case where the radiation source 13 is located at an infinite distance from the detector plane 2 a.

Specifically, the contour of the specific region is drawn for each frame, and the size of the contour of the specific region when SID is ∞.

When the radiation source 13 is infinitely distant from the detector plane 2a to perform imaging, all the radiation is orthogonal to the detector plane 2a, and therefore, even if the subject S moves in the direction perpendicular to the detector plane 2a, the change in the size of the specific region in each frame is small. That is, the size of the specific region when SID is ∞ can be regarded as the size of the specific region when there is no displacement in the direction perpendicular to the probe plane 2 a.

Then, the magnification of the specific region in the frame generated when the radiation source is located at the second position B with respect to the specific region when SID is ∞.

Then, an interpolation frame is generated by reducing the frame generated when the radiation source is located at the second position B to one-half the calculated magnification.

The control unit 31 constitutes an interpolation unit by executing the interpolation processing described above.

After the generation of the interpolation frame, the control unit 31 executes the replacement processing (step S4A).

In this replacement process, the control unit 31 replaces the frame generated when the radiation source 13 is located at the second position B in the moving image with the interpolated frame.

The frame generated when the radiation source 13 is at the second position B is replaced with the interpolated frame, and correction is performed so that there is no displacement in the direction perpendicular to the detector plane 2a during the movement of the subject S.

The control unit 31 constitutes a replacement means by executing the replacement processing described above.

[ Effect ]

In the system 100A of the present embodiment described above, the correction device 3A corrects the displacement in the direction perpendicular to the probe plane 2a during the operation of the subject S by replacing the frame generated when the radiation source 13 is located at the second position B with the interpolated frame.

Therefore, according to the system 100A, as in the system 100 of the first embodiment, it is possible to reduce the burden on both the photographer who photographs a moving image and the subject who is photographed, and the diagnostician can make an accurate diagnosis based on the moving image.

< third embodiment >

Next, a third embodiment of the present invention will be explained.

(Clamp)

The motion capture device includes a jig 5 (fig. 9).

The jig 5 can restrict movement in a direction perpendicular to the probe plane in the movement of the subject S.

The jig 5 of the present embodiment includes a support portion and a regulating portion 51 shown in fig. 9, for example.

The support portion fixes the regulating portion 51.

The support portion of the present embodiment is a rod-shaped member extending from a floor, a wall, a ceiling, a radiation irradiation device, an imaging table, not shown, and the like, which are located at the imaging position, to a position where the subject S is located at the time of imaging.

The restricting portion 51 is fixed by the support portion.

The restricting portion 51 of the present embodiment is attached to the tip of the support portion.

The limiting portion 51 is formed of a material that does not prevent transmission of radiation.

The restricting surface 51a of the present embodiment is provided in parallel with the probe plane at a position where the subject S is in contact during imaging.

The limiting portion 51 may be positioned on the detector side of the subject S with the limiting surface 51a facing the radiation irradiation device, or may be positioned on the radiation irradiation device side of the subject S with the limiting surface 51a facing the detector.

The position of the regulating portion 51 may be changed by deforming the supporting portion or moving the supporting portion relative to the supporting portion.

The restricting portion 51 may have a restricting surface 51a that is wide enough to simultaneously contact the entire subject S.

[ subject of dynamic imaging device ]

As in the first embodiment, the hand joint J shown in fig. 9, for example, is included in the movement of the subject S in which the subject S moves in the direction perpendicular to the probe plane₁Stretching and bending motions (motions when throwing a dart).

In this operation, the hand joint J is involved₁The hand is swung by stretching and bending, but if the jig 5 is not used at this time, the forearm may be displaced in the direction of swinging the hand by the power of the swinging hand, and as a result, the hand joint J may be formed₁Also displaced with the forearm. If the direction of waving the hand is perpendicular to the plane of the detector, the hand joint J₁But also in a direction perpendicular to the detector plane.

However, for example, as shown in fig. 9 (a), the hand joint J can be restricted by disposing the restricting portion 51 in contact with the upper arm₁Moving in a direction perpendicular to the detector plane.

Further, the hand joint J is imaged from a direction perpendicular to the movement plane of the hand (a direction orthogonal to the paper surface of fig. 9 (a))₁In the case of the operation (b), for example, as shown in fig. 9 (b), the regulating portion 51 may be arranged such that the regulating surface 51a is in contact with the hand and is parallel to the movement plane of the hand. In this way, the hand is operated while being kept in contact with the limiting surface 51a, and thus the movement of the subject S, which is not moving in the direction perpendicular to the limiting surface 51a (probe plane 2a) of the subject S, can be imaged.

< fourth embodiment >

Next, a fourth embodiment of the present invention will be explained.

Here, the same components as those of the third embodiment are denoted by the same reference numerals, and descriptions thereof are omitted.

[ Clamp ]

The motion capture device includes a jig 5A different from the third embodiment. (FIG. 10)

The jig 5A of the present embodiment can restrict the movement of the subject S in the direction perpendicular to the probe plane during the movement, similarly to the jig 5 of the third embodiment, but is different from the jig 5 of the third embodiment in the specific configuration.

The jig 5A of the present embodiment has a portion connected to the subject S at the time of imaging.

Specifically, the clamp 5A of the present embodiment is a rubber cord.

For example, in photographing the hand joint J₁In the case of (2), one end of the rubber string is hung on the tip of the upper arm (and the hand joint J)₁A portion where the rubber cord is connected), the other end portion is fixed to a floor or the like (for example, stepped on by a foot) in a state where the intermediate portion of the rubber cord is extended.

The upper arm is placed on the table and thigh (in sitting position).

As a result, the part with the one end of the rubber string attached thereto is fixed to the table or the thigh by the elastic force of the rubber string, and as a result, the movement of the subject S connected to the part with the one end of the rubber string attached thereto in the direction perpendicular to the probe plane can be restricted.

Here, a simple rubber string is exemplified as the jig 5A, and the jig 5A may have, for example, a support portion and a zigzag restricting portion that is supported by the support portion and supports the hands and feet of the subject S.

< fifth embodiment >

Next, a fifth embodiment of the present invention will be explained.

Here, the same components as those of the third embodiment are denoted by the same reference numerals, and descriptions thereof are omitted.

[ Clamp ]

The motion capture device includes a jig 5B different from that of the third embodiment. (FIG. 11)

The jig 5B of the present embodiment can restrict the movement of the subject S in the direction perpendicular to the probe plane during the movement, similarly to the jig 5 of the third embodiment, but is different from the jig 5 of the third embodiment in the specific configuration.

The jig 5B of the present embodiment has an elastic member that expands and contracts as the subject S moves parallel to the probe plane.

Specifically, the clamp 5B of the present embodiment is a rubber cord. That is, the entire jig 5B of the present embodiment is an elastic member.

For example, when photographing the shoulder joint J₄In the case of (2), one end of the rubber string is fixed to a hand or an arm (for example, held by a hand), and the other end is fixed to a floor or the like (for example, stepped on by a foot).

Then, the arm is moved up and down while maintaining the fixed state of the rubber string.

In this way, since the subject S moves by applying a force to a portion (an arm or the like) connected to the subject S in the direction in which the rubber cord stretches (the vertical direction) while recognizing the stretching of the rubber cord, the subject S is less likely to shake in the direction (the direction perpendicular to the probe plane) substantially perpendicular to the direction in which the rubber cord stretches.

< Others >

The present invention has been described above based on the embodiments, but the present invention is not limited to the above-described embodiments and the like, and can be modified as appropriate within a scope not departing from the gist of the present invention.

For example, although the above-described embodiments aim to diagnose the presence of a specific portion of a specific motion (stretching or bending), the systems 100 and 100A can be used to capture images of portions where no other motion is present, as long as the portions are displaced in a direction perpendicular to the probe plane.

In addition, although the system 100A according to the second embodiment generates an interpolation frame by moving the radiation source 13 in the direction perpendicular to the detector plane 2a, the same interpolation frame can be obtained by disposing the radiation source 13 at each of the first position a and the second position B and irradiating radiation from each of the radiation sources 13 to perform imaging.

In the above embodiment, the correction device 3 has the display function and the instruction function, but the correction device 3 may not have these functions and the console 4 may have these functions.

In the above description, an example of a computer-readable medium using a hard disk, a semiconductor nonvolatile memory, or the like as the program of 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 (carrier wave) can be applied as a medium for supplying data of the program of the present invention via a communication line.