Device and method for reducing X scattered rays during long bone splicing

Abstract

The invention relates to the technical field of medical equipment, and discloses a device and method for reducing X scattered rays during long bone splicing, the device comprises a detector module, a bulb tube module, a light bundling device and an anti-scattering device.The bulb tube module comprises a bulb tube and a bulb tube rack, the detector module comprises a detector, a detector rack and a long bone splicing frame, and the detector rack is connected with the long bone splicing frame. The long bone splicing frame is fixed in front of the detector rack, the bulb tube is fixed on the bulb tube rack, and the light bundling device is fixed on the bulb tube; a splicing object stands on the platform of the long bone splicing frame by facing the bulb tube; the anti-scattering device is placed between the splicing object and the bulb tube rack, and most scattered rays are prevented while useful X-rays emitted by the light bundling device are allowed to pass through the anti-scattering device. The method comprises a movement mechanism and a control method, and in long bone shooting, scattered rays in the shooting process can be reduced on the premise that the shooting effect is not affected.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to a device and method for reducing X-scattered rays when splicing long bones. Background Art

[0002] As we all know, X-ray photography produces ionizing radiation, so during conventional DR photography, the standard practice is to protect the non-photographing area by wearing lead protective clothing to reduce the impact of scattered radiation. Figure 1 As shown, experiments have shown that if only one part of the patient, such as the abdomen A, is photographed, there will be scattered rays to varying degrees at other points B~S (measured every 10 cm).

[0003] Ordinary spot film shooting can reduce scattered rays by wearing lead protective clothing, but it is inconvenient to protect when taking long bone splicing photos. The main reason is that the tube and the detector will move in a certain way when the long bones are spliced, that is, the X-ray source is moving. There are two methods for long bone splicing. One is that the tube intermittently swings the head, the detector moves to the set position, and then shoots. After the shooting is completed, the tube swings an angle, and the detector moves to the next position to shoot. In this way, several full-size images of the detector are spliced; the other is slit scanning, that is, the tube and the detector move synchronously from top to bottom in parallel, and the detector only takes a part of the central rectangular area. After shooting, the images of these central areas on the detector are spliced. These two long bone splicing methods determine that it is inconvenient to protect patients from scattered rays during shooting. Therefore, there is an urgent need for a method to reduce the scattered rays in the long bone splicing process and further reduce the radiation absorbed by patients during shooting. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the above-mentioned prior art and to provide a device and method for reducing X-ray scattering when splicing long bones, which includes a set of motion mechanisms and control methods. Through this method, the scattering rays in the shooting process can be reduced without affecting the shooting effect.

[0005] The present invention provides a device for reducing X-ray scattering when splicing long bones, comprising: a detector module, a tube module, a beam splitter and an anti-scattering device, wherein: The tube module includes a tube and a tube rack, the detector module includes a detector and a detector rack, the tube is fixed on the tube rack, the beam spotter is fixed on the tube, and the X-ray emitted by the tube passes through the splicing object and is received by the detector; The anti-scatter device is placed between the splicing object and the tube rack, and blocks most of the scattered rays while allowing the useful X-rays emitted by the beam spotter to pass through.

[0006] Furthermore, the tube and the detector move up and down on the tube rack and the detector rack respectively through the motion mechanisms thereon, and the synchronous movement of the tube and the detector is controlled by a synchronous controller.

[0007] Furthermore, the anti-scatter device includes a plurality of lead-tungsten alloy plates, a beam limiting mechanism and a motor mechanism, wherein: The lead-tungsten alloy plates are connected by hinges to prevent X-ray penetration, leaving a window in the middle section; The beam limiting mechanism is arranged at the window, and adjusts the window size according to the instruction of the exposure control panel to allow useful X-rays to pass through; The motor mechanism controls the lead-tungsten alloy plate to roll up and down according to the control instruction of the synchronous controller, so that the beam limiting mechanism moves up and down synchronously with the tube and the detector.

[0008] Preferably, the limiting mechanism includes an upper lead sheet movement mechanism and a lower lead sheet movement mechanism, the upper lead sheet movement mechanism includes an upper lead sheet, an upper guide rail and an upper motor, and the lower lead sheet movement mechanism includes a lower lead sheet, a lower guide rail and a lower motor.

[0009] More preferably, the upper guide rail is fixed to one side of the lead-tungsten alloy plate window on the anti-scatter device, and the lower guide rail is fixed to the other side of the lead-tungsten alloy plate window on the anti-scatter device, and the upper and lower lead leaves slide on the upper and lower guide rails respectively, and the sliding operation is controlled by the upper and lower motors respectively.

[0010] Furthermore, when the upper and lower lead sheets slide towards each other, the size of the window is reduced; When the upper and lower lead pages slide away from each other, the size of the window is increased.

[0011] Furthermore, during the exposure process, the upper and lower lead sheet movement mechanisms do not move, that is, the size of the window remains fixed.

[0012] Furthermore, the beam-limiting mechanism of the beam-splitting device and the anti-scattering device are both controlled by the exposure control board, and the beam-splitting device is used to control the irradiation range of the X-rays.

[0013] Furthermore, the detector module also includes a long bone splicing frame, which is fixed in front of the detector frame, and the splicing object stands on the platform of the long bone splicing frame facing the ball tube.

[0014] In another aspect, the present invention provides a method for reducing X-ray scattering during long bone splicing, comprising the following steps: S1: Selecting a long bone splicing protocol, the exposure software sends the window size data of the beam limiting mechanism of the beam optics and the anti-scatter device to the beam limiting mechanism of the beam optics and the anti-scatter device respectively according to the configuration parameters in the protocol, and controls the window size of the beam limiting mechanism according to the window size data; S2: Selecting the exposure start and end positions of the long bone splicing, the tube and the detector automatically move to the exposure start position through the motion mechanism thereon, and at the same time, controlling the lead-tungsten alloy plate to roll to move the beam limiting mechanism to the exposure start position; S3: After the long bone splicing exposure starts, the tube, the detector and the beam limiting mechanism move downward synchronously under the control of the synchronous controller. When it is detected that the tube and the detector reach the exposure end position, the movement of the tube, the detector and the anti-scatter device is stopped immediately, and the exposure is stopped.

[0015] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention designs an anti-scatter device, adopts a method similar to a rolling shutter door, but designs a beam limiting mechanism in the middle of the lead-tungsten alloy plate rolling shutter door, and the beam limiting mechanism can change the window size according to the set projection field. Above the rolling shutter door structure, there is a motor driving the beam limiting mechanism to move up and down with the tube, which can greatly reduce the scattered rays; (2) The present invention controls the X-ray irradiation range by controlling the beam emitter through the exposure control board, and at the same time controls the window size of the beam limiting mechanism of the anti-scatter device to meet the setting requirements, thereby ensuring that the X-rays can be normally transmitted during the long bone splicing process; The present invention controls the motion mechanisms of the tube, the detector and the anti-scattering device through a synchronous controller so as to keep synchronous motion during exposure. 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 This is a schematic diagram of scattered ray distribution during conventional DR photography of the present invention; Figure 2 This is a schematic diagram of the overall structure of a device for reducing X-scattered rays when splicing long bones according to the present invention; Figure 3 This is a schematic diagram of the structure of a detector module of the present invention; Figure 4 This is a schematic diagram of the structure of a ball tube module of the present invention; Figure 5 This is a schematic structural diagram of an anti-scattering device of the present invention; Figure 6 It is a schematic diagram of the structure of a beam limiting mechanism of an anti-scattering device of the present invention; Figure 7 A flow chart of a method for reducing X-scattered rays during long bone splicing according to the present invention; Figure 8 The present invention is a control system structure block diagram.

[0017] Reference numerals 1: Detector module; 11: detector; 12: detector rack; 13: long bone splicing rack; 2: tube module; 21: ball tube; 22: ball tube rack; 3: Anti-scatter device; 31: lead-tungsten alloy plate; 32: beam limiting mechanism; 321: Lead sheet movement mechanism; 3211: upper lead sheet; 3212: upper guide rail; 3213: upper motor; 322: lower lead sheet movement mechanism; 3221: lower lead sheet; 3222: lower guide rail; 3223: lower motor; 33: Motor mechanism; 4: Light beam. DETAILED DESCRIPTION

[0018] 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.

[0019] Those skilled in the art will appreciate that, unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present invention refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0020] The present invention provides a method capable of reducing scattered rays in the process of long bone splicing, thereby further reducing the radiation absorbed by the patient during the photographing process.

[0021] The present invention adds a protective device close to the human body. The device adopts a method similar to a rolling shutter door, but a beam limiting mechanism is designed in the middle of the rolling shutter door. The beam limiting mechanism can change the window size according to the set irradiation field. Above the rolling shutter door structure, there is a motor that drives the beam limiting mechanism to move up and down with the tube, which can greatly reduce scattered rays.

[0022] The specific implementation of the present invention is described below with reference to the accompanying drawings and embodiments.

[0023] Example 1 like Figure 2 As shown, the present embodiment provides a device for reducing X-ray scattering when splicing long bones, and the technical solution includes: a detector module 1, a tube module 2, a beam splitter 4 and an anti-scattering device 3, wherein: like Figure 3 and Figure 4 As shown, the tube module includes a tube 21 and a tube rack 22, the detector module 1 includes a detector 11, a detector rack 12 and a long bone splicing rack 13, the long bone splicing rack 13 is fixed in front of the detector rack 12, the tube 21 is fixed on the tube rack 22, the beam splitter 4 is fixed on the tube 21, and the X-ray emitted by the tube passes through the spliced ​​object and is received by the detector; The splicing object stands on the platform of the long bone splicing frame 13 facing the ball tube 21; The anti-scatter device 3 is placed between the splicing object and the tube rack 22, and blocks most of the scattered rays while allowing the useful X-rays emitted by the beam spotter 4 to pass through.

[0024] Furthermore, the tube 21 and the detector 11 move up and down on the tube rack 22 and the detector rack 12 respectively through the motion mechanisms thereon, and the synchronous movement of the tube 21 and the detector 11 is controlled by a synchronous controller.

[0025] Furthermore, if Figure 5 As shown, the anti-scatter device 3 includes a plurality of lead-tungsten alloy plates 31, a beam limiting mechanism 32 and a motor mechanism 33, wherein: The lead-tungsten alloy plates 31 are connected by hinges to prevent X-ray penetration, leaving a window in the middle section; The beam limiting mechanism 32 is arranged at the window, and adjusts the window size according to the instruction of the exposure control panel to allow useful X-rays to pass through; The motor mechanism 33 controls the lead-tungsten alloy plate 31 to roll up and down according to the control instruction of the synchronous controller, so that the beam limiting mechanism 32 moves up and down synchronously with the ball tube 21 and the detector 11.

[0026] Among them, although lead itself has a relatively good blocking effect on X-rays, it is not suitable for occasions that require frequent stretching due to its softness, so lead-tungsten alloy is used as the main protective material. The beam limiting mechanism 32 can change the size of the upper and lower windows according to the instructions of the exposure control board, and cooperate with the beam beamer 4 to allow useful X-rays to pass through while blocking most of the scattered rays.

[0027] Preferably, if Figure 6 As shown, the limiting mechanism 32 includes an upper lead sheet movement mechanism 321 and a lower lead sheet movement mechanism 322. The upper lead sheet movement mechanism 321 includes an upper lead sheet 3211, an upper guide rail 3212 and an upper motor 3213. The lower lead sheet movement mechanism 322 includes a lower lead sheet 3221, a lower guide rail 3222 and a lower motor 3223.

[0028] Among them, the upper guide rail 3212 is fixed to one side of the lead-tungsten alloy plate window on the anti-scatter device 3, and the lower guide rail 3222 is fixed to the other side of the lead-tungsten alloy plate window on the anti-scatter device 3. The upper and lower lead pages 3211 and 3221 slide on the upper and lower guide rails 3212 and 3222 respectively, and the sliding operation is controlled by the upper and lower motors 3213 and 3223 respectively.

[0029] Furthermore, when the upper and lower lead pages 3211 and 3221 slide toward each other, the size of the window is reduced; When the upper and lower lead pages 3211 and 3221 slide away from each other, the size of the window is increased.

[0030] Specifically, the anti-scatter beam limiting mechanism 32 can change the window size according to the control instruction before starting exposure. During the exposure process, the window size is fixed, and the upper and lower lead pages 3211 and 3221 movement mechanisms do not move.

[0031] In this embodiment, the beam splitter 4 and the beam limiting mechanism 32 of the anti-scatter device are both controlled by an exposure control board, and the beam splitter is used to control the irradiation range of the X-rays.

[0032] like Figure 7 As shown, a working principle or working process provided by the present invention is: (1) The technician selects the long bone splicing protocol; (2) The exposure control software will send the window size of the collimator and the window size of the beam limiting mechanism of the anti-scatter device to the collimator and the beam limiting mechanism of the anti-scatter device respectively according to the configuration parameters in the protocol. At this time, the window size of the beam limiting mechanism of the anti-scatter device is fixed; (3) The technician determines the starting and ending positions of the exposure for long bone splicing through positioning; (4) The tube and detector will automatically move to the exposure start position, and the beam limiting mechanism on the anti-scatter device will also move to the exposure start position; (5) The technician presses the hand switch to start exposure; (6) The tube, the detector and the beam limiting mechanism move downward synchronously under the control of the synchronous controller; (7) When the entire motion system detects that the tube has reached the exposure end position, the movement of the tube, detector, and anti-scatter device will be stopped immediately, and the exposure will be stopped immediately; (8) The entire long bone splicing exposure process is completed.

[0033] Among them, in this embodiment, Figure 8 It is a key control component of the system, where the exposure control board needs to control the window size of the beam limiter and the anti-scatter device to meet the setting requirements. The synchronous controller needs to control the tube, detector and anti-scatter motion mechanism to maintain synchronous movement during exposure.

[0034] Example 2 This embodiment provides a method for reducing X-ray scatter when splicing long bones, comprising the following steps: S1: Selecting a long bone splicing protocol, the exposure software sends the window size data of the beam limiting mechanism of the beam optics and the anti-scatter device to the beam limiting mechanism of the beam optics and the anti-scatter device respectively according to the configuration parameters in the protocol, and fixes the window size of the beam limiting mechanism according to the window size data; S2: Selecting the exposure start and end positions of the long bone splicing, the tube and the detector automatically move to the exposure start position through the motion mechanism thereon, and at the same time, controlling the lead-tungsten alloy plate to roll to move the beam limiting mechanism to the exposure start position; S3: After the exposure of long bone splicing begins, the tube, the detector and the beam limiting mechanism move downward synchronously under the control of a synchronous controller. When it is detected that the tube and the detector reach the exposure end position, the movement of the tube, the detector and the anti-scatter device is immediately stopped, and the exposure is stopped.

[0035] Obviously, those skilled in the art can make various changes and modifications to the invention without departing from the spirit and scope of the invention. Thus, if these modifications and variations of the invention fall within the scope of the claims of the invention and their equivalents, the invention is also intended to include these modifications and variations.

[0036] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for reducing X-ray scattering during long bone splicing, characterized in that: include: Detector module, tube module, beam splitter and anti-scatter device, wherein: The tube module includes a tube and a tube rack, the detector module includes a detector and a detector rack, the tube is fixed on the tube rack, the beam spotter is fixed on the tube, and the X-ray emitted by the tube passes through the splicing object and is received by the detector; The anti-scatter device is placed between the splicing object and the tube rack, and blocks most of the scattered rays while allowing the useful X-rays emitted by the beam spotter to pass through.

2. The device for reducing X-ray scattering during long bone splicing according to claim 1, characterized in that: The tube and the detector move up and down on the tube rack and the detector rack respectively through the motion mechanisms thereon, and the synchronous movement of the tube and the detector is controlled by a synchronous controller.

3. The device for reducing X-ray scattering during long bone splicing according to claim 2, characterized in that: The anti-scatter device includes a plurality of lead-tungsten alloy plates, a beam limiting mechanism and a motor mechanism, wherein: The lead-tungsten alloy plates are connected by hinges to prevent X-ray penetration, leaving a window in the middle section; The beam limiting mechanism is arranged at the window, and adjusts the window size according to the instruction of the exposure control panel to allow useful X-rays to pass through; The motor mechanism controls the lead-tungsten alloy plate to roll up and down according to the control instruction of the synchronous controller, so that the beam limiting mechanism moves up and down synchronously with the tube and the detector.

4. The device for reducing X-ray scattering during long bone splicing according to claim 3, characterized in that: The limiting mechanism includes an upper lead sheet movement mechanism and a lower lead sheet movement mechanism. The upper lead sheet movement mechanism includes an upper lead sheet, an upper guide rail and an upper motor. The lower lead sheet movement mechanism includes a lower lead sheet, a lower guide rail and a lower motor.

5. The device for reducing X-ray scattering during long bone splicing according to claim 4, characterized in that: The upper guide rail is fixed to one side of the lead-tungsten alloy plate window on the anti-scatter device, and the lower guide rail is fixed to the other side of the lead-tungsten alloy plate window on the anti-scatter device. The upper and lower lead leaves slide on the upper and lower guide rails respectively, and the sliding operation is controlled by the upper and lower motors respectively.

6. The device for reducing X-ray scattering during long bone splicing according to claim 5, characterized in that: When the upper and lower lead pages slide towards each other, the size of the window is reduced; When the upper and lower lead pages slide away from each other, the size of the window is increased.

7. The device for reducing X-ray scattering during long bone splicing according to claim 6, characterized in that: During the exposure process, the upper and lower lead sheet movement mechanisms do not move, that is, the size of the window remains fixed.

8. The device for reducing X-ray scattering during long bone splicing according to claim 7, characterized in that: The beam-splitting device and the beam-limiting mechanism of the anti-scattering device are both controlled by the exposure control board, and the beam-splitting device is used to control the irradiation range of the X-rays.

9. The device for reducing X-ray scattering during long bone splicing according to claim 1, characterized in that: The detector module also includes a long bone splicing frame, which is fixed in front of the detector frame. The splicing object stands on the platform of the long bone splicing frame facing the ball tube.

10. A method for reducing X-ray scattering when splicing long bones, based on the device according to any one of claims 1 to 7, characterized in that: The steps include: S1: Selecting a long bone splicing protocol, the exposure software sends the window size data of the beam limiting mechanism of the beam optics and the anti-scatter device to the beam limiting mechanism of the beam optics and the anti-scatter device respectively according to the configuration parameters in the protocol, and controls the window size of the beam limiting mechanism according to the window size data; S2: Selecting the exposure start and end positions of the long bone splicing, the tube and the detector automatically move to the exposure start position through the motion mechanism thereon, and at the same time, controlling the lead-tungsten alloy plate to roll to move the beam limiting mechanism to the exposure start position; S3: After the long bone splicing exposure starts, the tube, the detector and the beam limiting mechanism move downward synchronously under the control of the synchronous controller. When it is detected that the tube and the detector reach the exposure end position, the movement of the tube, the detector and the anti-scatter device is stopped immediately, and the exposure is stopped.

Images