A method, system and device for controlling shaking during long bone imaging

Abstract

The application relates to the technical field of medical equipment, and discloses a long bone shooting shake control method, system and device, the method comprising the following steps: a workstation receives patient registration information and issues a long bone splicing protocol to an exposure control board; the exposure control board acquires exposure parameters and a shooting frame rate, and simultaneously issues shooting frame rate information to a video analysis signal board; when shooting and exposure are started, the exposure control board transmits a shooting start signal to the video analysis signal board and forwards the signal to a camera, exposure procedures are coordinately controlled, and an image chain is shot at a certain frame rate; after shooting is completed, the video analysis signal board sends a shake amount of each frame of image relative to a previous frame of image to the workstation; the workstation adds the shake amount of each frame of image as a compensation amount to each frame of image for splicing; and a spliced image is output to an interface of the workstation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical equipment, and in particular to a long bone shooting shake control method, system and device. BACKGROUND

[0002] When shooting long bone splicing images of a patient by X-ray, generally, the patient needs to stand to shoot multiple images, and then the images are spliced. For example Figure 1 When shooting a full body, the commonly used shooting methods include tube swing, as shown in Figure 1 (a), and detector following movement, which requires about six images to be shot; another way is to use a slit scanning method, as shown in Figure 1 (b), that is, a part of a strip image near the center of the detector, at this time the tube and the detector move synchronously from top to bottom, and at this time dozens of images are shot.

[0003] When shooting long bone splicing images, from the completion of the technician's patient positioning to the completion of the technician's shooting, it takes about 1 minute, and during this period, the patient is generally required to maintain a standing posture. If the patient shakes during shooting, motion artifacts may be produced on the image, affecting the splicing accuracy of the image, and in severe cases, the splicing may fail. However, it is relatively difficult for the patient to maintain a standing posture during shooting, and the main reasons are as follows: for patients with physical inconvenience or patients who have just undergone surgery and are physically weak, although there are handrails during shooting, slight shaking may still occur; the patient may unconsciously shake due to inattention or nervousness; for children, especially children who love to move, shaking may occur during shooting. Therefore, since the patient may shake during long bone splicing shooting, it is necessary to consider how to reduce the impact of shaking on image splicing.

[0004] The existing device reduces shaking by providing a support device for the patient, for example, providing a handrail for the patient above the device, and the patient can hold the handrail to maintain the stability of the body during shooting.

[0005] However, the above method is from the perspective of preventing shaking during long bone splicing, and still cannot eliminate shaking. If the patient has already shaken, a method that can eliminate the impact of shaking on the image during image splicing will have a positive effect on improving image quality. Therefore, since the patient may shake during long bone splicing shooting, it is necessary to consider how to reduce the impact of shaking on image splicing. SUMMARY

[0006] The purpose of the present application is to solve the above-mentioned shortcomings in the prior art, and provide a long bone shooting shake control method, system and device, which can judge whether the patient shakes during shooting, and quantitatively give the amplitude of the shake. When the patient shakes during shooting, the shake amount can be automatically compensated when the image is spliced, the image motion artifact is reduced, the splicing failure probability is reduced, and the spliced image can better assist the doctor in diagnosis. At the same time, compared with the previous splicing recognition, the patient may not need to re-shoot after splicing compensation, reducing the patient's absorption of additional doses.

[0007] The long bone shooting shake control method comprises the following steps:

[0008] S1: The workstation receives the registration information of the shooting object and issues a long bone splicing protocol to the exposure control board, and the exposure control board obtains exposure parameters and shooting frame rate, and simultaneously issues shooting frame rate information to the video analysis signal board;

[0009] S2: Start shooting and exposure, the exposure control board sends a start shooting signal to the video analysis signal board and forwards it to the camera, so that the camera shoots according to the shooting frame rate, and the exposure control board coordinates the exposure process to make the image chain shoot according to the shooting frame rate;

[0010] S3: After exposure is completed, the video analysis signal board sends the shake amount of each frame of image shot by the camera relative to the previous frame of image to the workstation, and the workstation adds the shake amount as a compensation amount to each frame of X-ray image for splicing, and outputs the spliced image to the interface of the workstation.

[0011] Further, the video analysis signal board receives the image information transmitted by the camera and performs real-time processing, compares the images of the previous and subsequent frames, calculates the shake amount of the shooting object in the horizontal direction X and the vertical direction Y when the shooting object shakes, and judges whether the shake amount exceeds the set threshold.

[0012] Further, the judgment of whether the shake amount exceeds the set threshold comprises:

[0013] If the threshold is exceeded, the video analysis signal board sends a stop exposure signal to the exposure control board, and the exposure control board stops exposure immediately if it receives the stop exposure signal from the video analysis signal board;

[0014] If the threshold is not exceeded, continue exposure.

[0015] Further, the video analysis signal board sends the shake amount as a compensation amount to each frame of X-ray image for splicing further comprises:

[0016] record the index of the current X-ray image, and record the shaking amount of the two images taken by the camera in the horizontal direction or the vertical direction before and after the exposure;

[0017] When the images are spliced, the index and the shaking amount are compensated in reverse before splicing.

[0018] In step S2, the control exposure process further includes:

[0019] Exposure of X-ray is performed by the image chain system, and the exposed image is obtained;

[0020] The camera receives the signal of the video analysis signal board, takes pictures, and then sends the images to the video analysis signal board.

[0021] Further, in step S2, after starting shooting and exposure, the gantry starts to move, and the image chain system is driven by the gantry to move at a certain speed.

[0022] In addition, the application provides a long bone shooting shake control system, comprising:

[0023] The shooting preparation module is used for receiving patient registration information by the workstation and issuing a long bone splicing protocol to the exposure control board, the exposure control board obtains exposure parameters and shooting frame rate, and simultaneously issues shooting frame rate information to the video analysis signal board;

[0024] The shooting module is used for starting 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 according to the shooting frame rate, and the exposure control board coordinates the exposure process to make the image chain shoot according to the shooting frame rate;

[0025] The shaking compensation module is used for transmitting the shaking amount of each frame of image taken by the camera relative to the previous frame of image to the workstation after exposure, the workstation adds the shaking amount as a compensation amount to each frame of X-ray image for splicing, and outputs the spliced image to the interface of the workstation.

[0026] On the other hand, the application provides a long bone shooting shake control device, comprising a workstation, an exposure control board, a video analysis signal board, an image chain system, a gantry motion mechanism, and a camera, wherein,

[0027] The workstation is used for receiving patient registration information, and issuing a long bone splicing protocol to the exposure control board, and the workstation displays an image splicing preview to the user after shooting.

[0028] The exposure control board is used for issuing exposure parameters, coordinating and controlling the whole exposure process, and making the image chain expose according to a certain frame rate, the exposure control board receives the exposure stop signal of 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;

[0029] The video analysis signal board receives the shooting signal of the exposure control board, and forwards it to the camera for shooting, receives the image information of each frame of the camera during shooting, and performs real-time processing, and is responsible for sending an exposure stop signal to the exposure control board;

[0030] The image chain system comprises a ball tube, a high-voltage generator, a flat panel detector and a beam light device, and is used for X-ray exposure and image acquisition after exposure;

[0031] The gantry motion mechanism is used for driving the ball tube, the flat panel detector and the beam light device to move at a constant speed according to a certain speed;

[0032] The camera is used for receiving the signal of the video analysis signal board, performing image acquisition based on the signal, and sending the image to the video analysis signal board.

[0033] Compared with the prior art, the beneficial effects of the present application are:

[0034] (1) The present application can eliminate the influence of shaking on images by judging whether shaking occurs during patient shooting and quantitatively giving the amplitude value of shaking;

[0035] (2) The present application can automatically compensate the shaking amount when splicing images, reduce image motion artifacts, and reduce the probability of splicing failure, compared with the previous method, if splicing identification occurs, the patient needs to be re-shot, after splicing compensation, the patient does not need to be re-shot with a high probability, and the patient absorbs an additional dose. DETAILED DESCRIPTION

[0036] The accompanying drawings are used to provide a further understanding of the present application, and constitute a part of the specification, and are used to explain the present application together with embodiments of the present application, and do not constitute a limitation on the present application. In the drawings:

[0037] Figure 1 It is a schematic diagram of a long bone splicing method of a ball tube swing type and a slit scanning type in the prior art;

[0038] Figure 2 It is a long bone shooting shaking control method flow chart of the present application;

[0039] Figure 3This is a schematic diagram illustrating the implementation process of a shaking control method during long bone imaging according to the present invention;

[0040] Figure 4 This is a schematic diagram of the component relationships of a shaking control device for long bone imaging according to the present invention. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0042] To eliminate the impact of subject movement on the image, this invention determines whether the patient is moving during the shooting process and can automatically compensate for the amount of movement when stitching the images, reducing image motion artifacts, lowering the probability of stitching failure, and compensating for shaky images during stitching, thereby reducing the amount of additional dose absorbed by the patient.

[0043] The specific embodiments of the present invention will be described below with reference to the accompanying drawings and examples.

[0044] Example 1

[0045] like Figure 2 As shown in the figure, this embodiment provides a method for controlling shaking during long bone imaging, and the technical solution includes the following steps:

[0046] S1: The workstation receives patient registration information and sends the long bone splicing protocol to the exposure control board. The exposure control board obtains the exposure parameters and shooting frame rate, and at the same time sends the shooting frame rate information to the video analysis signal board.

[0047] S2: Start shooting and exposure. The exposure control board transmits the start shooting signal to the video analysis signal board and forwards it to the camera, so that the camera shoots according to the shooting frame rate. The exposure control board controls the exposure process so that the image chain is exposed according to the shooting frame rate.

[0048] S3: After exposure is completed, the video analysis signal board sends the amount of shaking of each frame of the image captured by the camera relative to the previous frame to the workstation. The workstation adds the amount of shaking as a compensation to each frame of X-ray image for stitching and outputs the stitched image to the interface of the workstation.

[0049] In one embodiment of the present invention, the camera's photo frame rate is equal to the shooting frame rate.

[0050] Among them, such asFigure 3 As shown, during the shooting in step S2, the video analysis signal board receives the image information of each frame from the camera and performs real-time processing. By comparing the images of the previous and next frames, when the patient shakes, the amount of shaking of the patient in the horizontal direction X and the vertical direction Y is calculated, and it is determined whether the amount of shaking exceeds the set threshold.

[0051] Specifically, determining whether the amount of sway exceeds a set threshold further includes:

[0052] 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 the exposure.

[0053] If the threshold is not exceeded, continue exposure.

[0054] like Figure 3 As shown, in this embodiment, the workstation further includes adding the sway amount as a compensation amount to each frame of X-ray image for stitching, which further includes:

[0055] Record the index of the current X-ray image, and at the same time record the amount of horizontal or vertical shaking between the two frames captured by the camera.

[0056] When stitching images, reverse compensation is performed based on the index and the amount of shaking before stitching.

[0057] For example, if a patient moves 2mm horizontally in a frame of an X-ray image, then a 2mm offset is applied during stitching before stitching.

[0058] Furthermore, in step S2, controlling the exposure process further includes:

[0059] X-ray exposure is performed using an image chain system, and the exposed images are acquired.

[0060] The camera receives signals from the video analysis signal board, captures images, and then sends the images to the video analysis signal board.

[0061] Furthermore, in step S2, after the shooting and exposure begin, the gantry begins to move, and the gantry drives the image chain system to move at a constant speed to shoot.

[0062] This embodiment can identify whether the patient is shaking during the X-ray process by comparing the differences between the previous and next frames of the camera. If shaking is detected, the system will take appropriate action according to the pre-set handling method, such as stopping the exposure or continuing the exposure.

[0063] If the shaking is identified, the shaking amplitude is calculated in real time, and if the shaking amplitude is too large, it will cause the X-ray image to be unable to be normally spliced even through the subsequent compensation, a shaking threshold is set, if the threshold is exceeded, the exposure is immediately stopped, instead of waiting for the image to be spliced to find that the image cannot be used and needs to be re-shot, so that the dose received by the patient can be reduced. At the same time, if the shaking amplitude is within the set threshold, the exposure can be continued, but the system records the current exposure position of the gantry when the shaking occurs, and compares the front and rear frame images captured by the camera and calculates 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 splicing compensation during the splicing process of the image, and the image is spliced and compensated.

[0064] In addition, the embodiment also discloses a shaking control system during long bone shooting, which comprises:

[0065] A shooting preparation module is configured to receive patient registration information by a workstation and issue a long bone splicing protocol to an exposure control board, wherein the exposure control board acquires exposure parameters and a shooting frame rate, and simultaneously issues shooting frame rate information to a video analysis signal board;

[0066] A shooting module is configured to start shooting and exposure, wherein the exposure control board transmits a shooting start signal to the video analysis signal board and forwards the shooting start signal to a camera, so that the camera shoots according to the shooting frame rate, and the exposure control board coordinately controls an exposure process, so that an image chain shoots according to the shooting frame rate;

[0067] A shaking compensation module is configured to send, by the video analysis signal board, a shaking amount of each frame of image shot by the camera relative to a previous frame of image to the workstation after the exposure is completed, and the workstation adds the shaking amount as a compensation amount to each frame of X-ray image for splicing, and outputs the spliced image to an interface of the workstation.

[0068] Meanwhile, the embodiment discloses a shaking control device during long bone shooting, as shown in the figure, comprising a workstation, an exposure control board, a video analysis signal board, an image chain system, a gantry motion mechanism and a camera, wherein, Figure 4

[0069] The workstation is configured to receive patient registration information and issue a long bone splicing protocol to the exposure control board, and the workstation displays an image splicing preview picture to a user after shooting is completed.

[0070] ​The exposure control board is used to issue exposure parameters, coordinate and control the whole exposure process, and make the image chain expose according to a certain frame rate.

[0071] The video analysis signal board receives the shooting signal of the exposure control board and forwards it to the camera for shooting, receives the image information of each frame of the camera during shooting, and performs real-time processing, and is responsible for sending an exposure stop signal to the exposure control board.

[0072] The image chain system includes a ball tube, a high-voltage generator, a flat panel detector, and a beam light device, which are used for X-ray exposure and image acquisition after exposure.

[0073] The gantry motion mechanism is used to drive the ball tube, the flat panel detector, and the beam light device to move at a constant speed according to a certain speed.

[0074] The camera is used to receive the signal of the video analysis signal board, perform image acquisition based on the signal, and send the image to the video analysis signal board.

[0075] Finally, it should be noted that the above description is only the preferred embodiment of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments. Any technical solution falling within the scope of the present application is within the protection scope of the present application. It should be noted that for ordinary technical personnel in the technical field, some improvements and decorations without departing from the principles of the present application are also considered as the protection scope of the present application.

[0076] The technical features of the above-described embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

Claims

1. A method for controlling shaking during radiography of a long bone, characterized by, Comprising the following steps: S1: the workstation receives the registration information of the shooting object and issues a long bone splicing protocol to the exposure control board, which obtains exposure parameters and shooting frame rate, and simultaneously issues shooting frame rate information to the video analysis signal board; S2: start shooting and exposure, the exposure control board transmits the start shooting signal to the video analysis signal board and forwards it to the camera, so that the camera shoots according to the shooting frame rate, and the exposure control board coordinates the exposure process to make the image chain shoot according to the shooting frame rate; S3: after exposure is completed, the video analysis signal board sends the shaking amount of each frame of image shot by the camera relative to the previous frame of image to the workstation, and the workstation adds the shaking amount as a compensation amount to each frame of X-ray image for splicing, and outputs the spliced image to the interface of the workstation; Wherein, the shooting frame rate of the camera is equal to the shooting frame rate.

2. The long bone shooting shake control method according to claim 1, characterized by, In the shooting of step S2, the video analysis signal board receives each frame of image information transmitted by the camera and performs real-time processing, compares the images of the previous and subsequent frames, calculates the shaking amount of the shooting object in the horizontal direction X and the vertical direction Y when the shooting object shakes, and judges whether the shaking amount exceeds a set threshold.

3. The long bone shooting shake control method of claim 2, wherein, Judging whether the shaking amount exceeds a set threshold further comprises: If the threshold is exceeded, the video analysis signal board sends a stop exposure signal to the exposure control board, and the exposure control board stops exposure immediately if it receives the stop exposure signal from the video analysis signal board; If the threshold is not exceeded, exposure continues.

4. The long bone shooting shake control method of claim 1, wherein, The workstation further comprises: Recording the index of the current X-ray image, and recording the shaking amount of the previous and subsequent frames of image shot by the camera in the horizontal direction or the vertical direction; When splicing the image, reverse compensation is performed according to the index and the shaking amount before splicing.

5. The long bone shooting shake control method of claim 1, wherein, In step S2, the control exposure process further comprises: Exposure of X-ray is performed through the image chain system, and the exposed image is obtained; The camera receives the signal of the video analysis signal board and performs image acquisition, and then sends the image to the video analysis signal board.

6. The long bone shooting shake control method of claim 5, wherein, In step S2, after starting shooting and exposure, the gantry starts to move, and the gantry drives the image chain system to move at a certain speed for shooting.

7. A shaking control system for long bone imaging, characterized in that, Comprise: A shooting preparation module for the workstation to receive patient registration information and issue a long bone splicing protocol to the exposure control board, the exposure control board obtains exposure parameters and shooting frame rate, and simultaneously issues shooting frame rate information to the video analysis signal board; A shooting module for starting shooting and exposure, the exposure control board transmits the start shooting signal to the video analysis signal board and forwards it to the camera, so that the camera shoots according to the shooting frame rate, and the exposure control board coordinates the exposure process to make the image chain shoot according to the shooting frame rate; A shaking compensation module is configured to send a shaking amount of each frame of image captured by the camera relative to a previous frame of image to the workstation after exposure is completed, and the workstation adds the shaking amount as a compensation amount to each frame of X-ray image for splicing, and outputs the spliced image to an interface of the workstation. The photographing frame rate of the camera is equal to the photographing frame rate.

8. A device for controlling the shaking during the radiography of a long bone for performing the method according to any one of claims 1 to 6, characterized in that it comprises: The system comprises a workstation, an exposure control board, a video analysis signal board, an image chain system, a gantry motion mechanism, and a camera. The workstation is configured to receive patient registration information, and send a long bone splicing protocol to the exposure control board. The exposure control board is configured to send exposure parameters, and coordinate and control the entire exposure process to make the image chain expose at a certain frame rate. The video analysis signal board is configured to receive a photographing signal of the exposure control board, and forward the photographing signal to the camera for photographing. The image chain system comprises a tube, a high-voltage generator, a flat panel detector, and a beam light device, and is configured to perform X-ray exposure and obtain an exposed image. The gantry motion mechanism is configured to drive the tube, the flat panel detector, and the beam light device to move at a constant speed. The camera is configured to receive a signal of the video analysis signal board, perform image capturing based on the signal, and send the image to the video analysis signal board. ​

Images