Shake control method, system and device during long bone shooting

Abstract

The invention relates to the technical field of medical equipment, and discloses a shake control method, system and device during long bone shooting, and the method comprises the steps: a work station receives patient registration information and issues a long bone splicing protocol to an exposure control panel, the exposure control panel obtains exposure parameters and a shooting frame rate, and the exposure parameters and the shooting frame rate are sent to a server; meanwhile, shooting frame rate information is issued to the video analysis signal board; when shooting and exposure are started, the exposure control board transmits a shooting starting signal to the video analysis signal board and forwards the shooting starting signal to the camera, and the exposure process is controlled in a coordinated manner, so that an image chain is shot according to a certain frame rate; after shooting is completed, the video analysis signal board sends the shake amount of each frame of image relative to the previous frame of image to the work station, the work station takes the shake amount of each frame of image as compensation amount and adds the compensation amount into each frame of image for splicing, and the spliced image is output to an interface of the work station.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to a method, system and device for controlling shaking during long bone photography. Background Art

[0002] When taking X-rays of a patient's entire body, entire spine, or entire lower limb long bone splicing, the patient is generally required to stand to take multiple images, and then the images are spliced. Figure 1 When taking full-body photos, the commonly used shooting methods include swinging the tube, such as Figure 1 (a), the detector follows the motion, which requires about six images; another method is through slit scanning, such as Figure 1 (b) is to take a part of the strip graph near the center of the detector. At this time, the tube and the detector move synchronously from top to bottom, and dozens of images are taken.

[0003] When taking long bone splicing images, it takes about 1 minute from the technician positioning the patient to the technician taking the photo. During this period, the patient is generally required to remain in a standing position. If the patient shakes during the shooting, motion artifacts may be generated on the image, affecting the stitching accuracy of the image, and in severe cases, leading to stitching failure. However, it is relatively difficult to require the patient to remain motionless during the shooting process. The main reasons are as follows: For patients with physical disabilities or who have just undergone surgery and are relatively weak, although there are handrails during shooting, there will still be slight shaking; patients are not focused or are nervous, and they shake involuntarily; for children, especially those who love to move, they may also shake during shooting. Therefore, since there is a certain probability that the patient will shake when shooting long bone splicing, it is necessary to think about how to reduce the impact of shaking on image stitching.

[0004] Existing equipment reduces shaking by providing a supporting device for the patient. For example, an armrest is provided for the patient above the equipment. During the shooting process, the patient can raise both hands and hold the armrest to keep the body stable.

[0005] However, the above method is based on the perspective of preventing shaking during long bone splicing, and it is still impossible to eliminate shaking. If the patient has already experienced shaking, if there is a method that can eliminate the impact of shaking on the image during the image stitching process, it will have a positive effect on improving image quality. Therefore, since there is a certain probability that the patient will shake when shooting long bone splicing, it is necessary to think about how to reduce the impact of shaking on image stitching. Summary of the invention

[0006] The purpose of the present invention is to solve the shortcomings of the above-mentioned prior art, and to provide a method, system and device for controlling shaking during long bone photography, which can determine whether the patient shakes during the photography process and quantitatively give the amplitude of the shaking. When the patient shakes during the photography process, the shaking amount can be automatically compensated when the images are spliced, reducing image motion artifacts and the probability of splicing failure. After splicing compensation for the shaking image, the image can better assist doctors in diagnosis. At the same time, compared with the previous situation where reshooting is required for splicing recognition, after adding splicing compensation, the patient may not need to reshoot, reducing the patient's absorption of additional doses.

[0007] Among them, a method for controlling shaking when photographing long bones includes the following steps: S1: The workstation receives the registration information of the photographed object and sends the long bone splicing protocol to the exposure control board, and the exposure control board obtains the exposure parameters and the shooting frame rate, and sends the shooting frame rate information to the video analysis signal board; S2: Start shooting and exposure. The exposure control board transmits a shooting start signal to the video analysis signal board and forwards it to the camera, so that the camera shoots at the shooting frame rate. The exposure control board coordinates and controls the exposure process, so that the image chain shoots at the shooting frame rate. S3: After the exposure is completed, the video analysis signal board sends the shaking amount of each frame image taken by the camera relative to the previous frame image to the workstation, and the workstation adds the shaking amount as a compensation amount to each frame of the X-ray image for stitching, and outputs the stitched image to the interface of the workstation.

[0008] Furthermore, the video analysis signal board receives each frame of image information from the camera and performs real-time processing to compare the images of the previous and next frames. When the subject is shaking, the shaking amount of each frame of the subject in the horizontal direction X and the vertical direction Y is calculated, and it is determined whether the shaking amount exceeds a set threshold.

[0009] Wherein, the determining whether the shaking amount exceeds a set threshold further includes: If the threshold is exceeded, the video analysis signal board sends a stop exposure signal to the exposure control board. If the exposure control board receives the stop exposure signal from the video analysis signal board, it immediately stops exposure. If the threshold is not exceeded, the exposure continues.

[0010] Furthermore, the workstation adds the shaking amount as a compensation amount to each frame of the X-ray image for stitching, further comprising: Record the index of the current X-ray image, and at the same time record the shaking amount of the two frames of images taken by the camera in the horizontal or vertical direction; When stitching images, reverse compensation is performed according to the index and the shaking amount before stitching.

[0011] In step S2, the exposure control process further includes: Expose X-rays through the image chain system and obtain images after exposure; The camera receives the signal from the video analysis signal board, captures the image, and then sends the image to the video analysis signal board.

[0012] Furthermore, in step S2, after shooting and exposure start, the frame starts to move, and the frame drives the image chain system to move at a constant speed to shoot.

[0013] In addition, the present invention provides a long bone shaking control system during shooting, comprising: The shooting preparation module is used for the workstation to receive the patient registration information and send the long bone splicing protocol to the exposure control board, and the exposure control board obtains the exposure parameters and shooting frame rate, and sends the shooting frame rate information to the video analysis signal board; A shooting module is used to start shooting and exposure. The exposure control board transmits a shooting start signal to the video analysis signal board and forwards it to the camera, so that the camera shoots at the shooting frame rate. The exposure control board coordinates and controls the exposure process, so that the image chain shoots at the shooting frame rate. The shake compensation module is used for the video analysis signal board to send the shake amount of each frame image taken by the camera relative to the previous frame image to the workstation after the exposure is completed. The workstation adds the shake amount as the compensation amount to each frame of the X-ray image for splicing, and outputs the spliced ​​image to the interface of the workstation.

[0014] On the other hand, the present invention provides a long bone shaking control device, comprising: a workstation, an exposure control board, a video analysis signal board, an image chain system, a frame movement mechanism, and a camera, wherein: The workstation is used to receive patient registration information and send a long bone splicing protocol to the exposure control board. After the shooting is completed, the workstation displays an image splicing preview to the user; The exposure control board is used to issue exposure parameters, coordinate and control the entire exposure process, so that the image chain is exposed at a certain frame rate. The exposure control board receives the exposure stop signal from the video analysis signal board, and controls the image chain system to stop exposure immediately after receiving the exposure stop signal. When starting exposure, the exposure control board sends a video acquisition trigger signal to the video analysis signal board; The video analysis signal board receives the shooting signal from the exposure control board and forwards it to the camera for shooting. During shooting, it receives the image information of each frame from the camera and performs real-time processing. At the same time, it is responsible for sending an exposure stop signal to the exposure control board. The imaging chain system includes a tube, a high voltage generator, a flat panel detector and a beam optic, and is used for performing X-ray exposure and obtaining images after exposure; The rack motion mechanism is used to drive the tube, the flat panel detector and the beam spotter to move at a constant speed; The camera is used to receive a signal from a video analysis signal board, capture images based on the signal, and send the images to the video analysis signal board.

[0015] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention eliminates the influence of shaking on the image by judging whether the patient is shaking during the shooting process and quantitatively giving the amplitude value of the shaking; (2) The present invention reduces image motion artifacts and the probability of stitching failure by automatically compensating for the amount of shaking when stitching images. Compared with the past, if stitching recognition required reshooting, the present invention increases the probability that the patient does not need to reshoot after stitching compensation, thereby reducing the patient's absorption of additional doses. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of a tube swinging head type and a slit scanning type long bone splicing method in the prior art; Figure 2 This is a flow chart of a method for controlling shaking during long bone photography according to the present invention; Figure 3 It is a schematic diagram of the implementation process of a shaking control method when photographing long bones according to the present invention; Figure 4 The present invention is a schematic diagram of the relationship between the components of a shaking control device for long bone photography. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0018] In order to eliminate the influence of shaking of the subject on the image, the present invention determines whether shaking occurs during the patient shooting process, and can automatically compensate for the shaking amount when stitching the images, thereby reducing image motion artifacts, reducing the probability of stitching failure, and performing stitching compensation for the shaking images, thereby reducing the patient's absorption of additional doses.

[0019] The specific implementation of the present invention is described below with reference to the accompanying drawings and embodiments.

[0020] Example 1 like Figure 2 As shown, this embodiment provides a method for controlling shaking of long bones during shooting, and the technical solution includes the following steps: S1: The workstation receives the patient registration information and sends the long bone splicing protocol to the exposure control board, which obtains the exposure parameters and shooting frame rate, and sends the shooting frame rate information to the video analysis signal board; S2: Start shooting and exposure. The exposure control board transmits a shooting start signal to the video analysis signal board and forwards it to the camera, so that the camera shoots at the shooting frame rate. The exposure control board controls the exposure process so that the image chain is exposed at the shooting frame rate. S3: After the exposure is completed, the video analysis signal board sends the shaking amount of each frame image taken by the camera relative to the previous frame image to the workstation, and the workstation adds the shaking amount as a compensation amount to each frame of the X-ray image for stitching, and outputs the stitched image to the interface of the workstation.

[0021] In one embodiment of the present invention, the photographing frame rate of the camera is equal to the shooting frame rate.

[0022] Among them, Figure 3 As shown, during the shooting of step S2, the video analysis signal board receives each frame of image information from the camera and performs real-time processing to compare the images of the previous and next frames. When the patient shakes, the shaking amount of the patient in the horizontal direction X and the vertical direction Y is calculated, and it is determined whether the shaking amount exceeds the set threshold.

[0023] Specifically, the determining whether the shaking amount exceeds a set threshold further includes: If the threshold is exceeded, the video analysis signal board sends a stop exposure signal to the exposure control board. If the exposure control board receives the stop exposure signal from the video analysis signal board, it immediately stops exposure. If the threshold is not exceeded, the exposure continues.

[0024] like Figure 3As shown, in this embodiment, the workstation adds the shaking amount as a compensation amount to each frame of X-ray image for stitching further includes: Record the index of the current X-ray image, and at the same time record the shaking amount of the two frames of images taken by the camera in the horizontal or vertical direction; When stitching images, reverse compensation is performed according to the index and the shaking amount before stitching.

[0025] For example, if the patient shakes 2mm in the horizontal direction in a certain frame of X-ray image, the stitching is performed after reverse compensation of 2mm.

[0026] In addition, in step S2, the exposure control process further includes: Expose X-rays through the image chain system and obtain images after exposure; The camera receives the signal from the video analysis signal board, captures the image, and then sends the image to the video analysis signal board.

[0027] Furthermore, in step S2, after shooting and exposure start, the frame starts to move, and the frame drives the image chain system to move at a constant speed to shoot.

[0028] This embodiment can identify whether the patient is shaking during the X-ray shooting process by comparing the difference between the previous and next frame images through the camera. If shaking, corresponding processing is performed according to a pre-set treatment method, such as stopping exposure or continuing exposure.

[0029] If shaking is detected, the shaking amplitude is calculated in real time. If the shaking amplitude is too large, the X-ray image cannot be stitched together normally even through subsequent compensation. In this way, a shaking threshold is set. If it exceeds the threshold, the exposure is stopped immediately, rather than waiting for the image to be stitched together to find that the image is unusable and needs to be retaken. This can reduce the dose received by the patient. At the same time, if the shaking amplitude is within the set threshold, the exposure can continue, but the system will record the current exposure position of the frame during the shaking, and compare the front and rear frame images taken by the camera and calculate the shaking amount of the front and rear frame images. When the X-ray exposure is completed, the shaking point and the shaking amount calculated by the image are added to the stitching supplement during the image stitching process to compensate for the image stitching.

[0030] In addition, this embodiment also discloses a long bone shaking control system during shooting, including: The shooting preparation module is used for the workstation to receive the patient registration information and send the long bone splicing protocol to the exposure control board, and the exposure control board obtains the exposure parameters and shooting frame rate, and sends the shooting frame rate information to the video analysis signal board; A shooting module is used to start shooting and exposure. The exposure control board transmits a shooting start signal to the video analysis signal board and forwards it to the camera, so that the camera shoots at the shooting frame rate. The exposure control board coordinates and controls the exposure process, so that the image chain shoots at the shooting frame rate. The shake compensation module is used for the video analysis signal board to send the shake amount of each frame image taken by the camera relative to the previous frame image to the workstation after the exposure is completed. The workstation adds the shake amount as the compensation amount to each frame of the X-ray image for splicing, and outputs the spliced ​​image to the interface of the workstation.

[0031] At the same time, this embodiment discloses a device for controlling the shaking of long bones during shooting. Figure 4 As shown, it includes: workstation, exposure control board, video analysis signal board, image chain system, rack motion mechanism, camera, among which, The workstation is used to receive patient registration information and send a long bone splicing protocol to the exposure control board. After the shooting is completed, the workstation displays an image splicing preview to the user; The exposure control board is used to issue exposure parameters, coordinate and control the entire exposure process, so that the image chain is exposed at a certain frame rate. The exposure control board receives the exposure stop signal from the video analysis signal board, and controls the image chain system to stop exposure immediately after receiving the exposure stop signal. When starting exposure, the exposure control board sends a video acquisition trigger signal to the video analysis signal board; The video analysis signal board receives the shooting signal from the exposure control board and forwards it to the camera for shooting. During shooting, it receives the image information of each frame from the camera and performs real-time processing. At the same time, it is responsible for sending an exposure stop signal to the exposure control board. The imaging chain system includes a tube, a high voltage generator, a flat panel detector and a beam optic, and is used for performing X-ray exposure and obtaining images after exposure; The rack motion mechanism is used to drive the tube, the flat panel detector and the beam spotter to move at a constant speed; The camera is used to receive a signal from a video analysis signal board, capture images based on the signal, and send the images to the video analysis signal board.

[0032] Finally, it should be noted that the above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

[0033] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A method for controlling shaking during long bone photography, characterized in that: The steps include: S1: The workstation receives the registration information of the photographed object and sends the long bone splicing protocol to the exposure control board, and the exposure control board obtains the exposure parameters and the shooting frame rate, and sends the shooting frame rate information to the video analysis signal board; S2: Start shooting and exposure. The exposure control board transmits a shooting start signal to the video analysis signal board and forwards it to the camera, so that the camera shoots at the shooting frame rate. The exposure control board coordinates and controls the exposure process, so that the image chain shoots at the shooting frame rate. S3: After the exposure is completed, the video analysis signal board sends the shaking amount of each frame image taken by the camera relative to the previous frame image to the workstation, and the workstation adds the shaking amount as a compensation amount to each frame of the X-ray image for stitching, and outputs the stitched image to the interface of the workstation.

2. The method for controlling shaking of long bones during shooting according to claim 1, characterized in that: During the shooting of step S2, the video analysis signal board receives each frame of image information from the camera and performs real-time processing to compare the images of the previous and next frames. When the photographed object shakes, the shaking amount of each frame of the photographed object in the horizontal direction X and the vertical direction Y is calculated, and it is determined whether the shaking amount exceeds the set threshold.

3. The method for controlling shaking of long bones during shooting according to claim 2, characterized in that: The step of determining whether the shaking amount exceeds a set threshold further includes: If the threshold is exceeded, the video analysis signal board sends a stop exposure signal to the exposure control board. If the exposure control board receives the stop exposure signal from the video analysis signal board, it immediately stops exposure. If the threshold is not exceeded, the exposure continues.

4. The method for controlling shaking of long bones during photographing according to claim 1, characterized in that: The workstation adds the shaking amount as a compensation amount to each frame of X-ray image for splicing, further comprising: Record the index of the current X-ray image, and at the same time record the shaking amount of the two frames of images taken by the camera in the horizontal or vertical direction; When stitching images, reverse compensation is performed according to the index and the shaking amount before stitching.

5. The method for controlling shaking of long bones during photographing according to claim 1, characterized in that: In step S2, the exposure control process further includes: Expose X-rays through the image chain system and obtain images after exposure; The camera receives the signal from the video analysis signal board, captures the image, and then sends the image to the video analysis signal board.

6. The method for controlling shaking of long bones during photographing according to claim 5, characterized in that: In step S2, after shooting and exposure start, the frame starts to move, and the frame drives the image chain system to move at a constant speed to shoot.

7. A long bone shaking control system during shooting, characterized in that: include: The shooting preparation module is used for the workstation to receive the patient registration information and send the long bone splicing protocol to the exposure control board, and the exposure control board obtains the exposure parameters and shooting frame rate, and sends the shooting frame rate information to the video analysis signal board; A shooting module is used to start shooting and exposure. The exposure control board transmits a shooting start signal to the video analysis signal board and forwards it to the camera, so that the camera shoots at the shooting frame rate. The exposure control board coordinates and controls the exposure process, so that the image chain shoots at the shooting frame rate. The shake compensation module is used for the video analysis signal board to send the shake amount of each frame image taken by the camera relative to the previous frame image to the workstation after the exposure is completed. The workstation adds the shake amount as the compensation amount to each frame of the X-ray image for splicing, and outputs the spliced ​​image to the interface of the workstation.

8. A device for controlling the shaking of long bones during shooting, characterized in that: include: Workstation, exposure control board, video analysis signal board, image chain system, rack motion mechanism, camera, among which, The workstation is used to receive patient registration information and send a long bone splicing protocol to the exposure control board. After the shooting is completed, the workstation displays an image splicing preview to the user; The exposure control board is used to issue exposure parameters, coordinate and control the entire exposure process, so that the image chain is exposed at a certain frame rate. The exposure control board receives the exposure stop signal from the video analysis signal board, and controls the image chain system to stop exposure immediately after receiving the exposure stop signal. When starting exposure, the exposure control board sends a video acquisition trigger signal to the video analysis signal board; The video analysis signal board receives the shooting signal from the exposure control board and forwards it to the camera for shooting. During shooting, it receives the image information of each frame from the camera and performs real-time processing. At the same time, it is responsible for sending an exposure stop signal to the exposure control board. The imaging chain system includes a tube, a high voltage generator, a flat panel detector and a beam optic, and is used for performing X-ray exposure and obtaining images after exposure; The rack motion mechanism is used to drive the tube, the flat panel detector and the beam spotter to move at a constant speed; The camera is used to receive a signal from a video analysis signal board, capture images based on the signal, and send the images to the video analysis signal board.

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