Flat plate expansion device integrated on proton treatment head

Abstract

The invention discloses a flat plate expansion device integrated on a proton treatment head, which is characterized in that the flat plate expansion device is integrated on two sides of a proton treatment head bracket through a motor and a mechanical transmission system, and is arranged between an inverted trapezoidal front panel and an inverted trapezoidal rear panel on two sides of the proton treatment head; when the imaging system is changed from a closed state to a working state, the flat plate telescopic device is unfolded from top to bottom and from inside to outside along the proton treatment head bracket in a splayed track; when the imaging system is changed from a working state to a closed state, the flat plate telescopic device shrinks from bottom to top and from outside to inside along the proton treatment head support in a splayed track, so that integration of the flat plate telescopic device and the proton treatment head support is integration which does not interfere with other devices in a limited space. Due to the fact that the flat plate telescopic device adopts an inward-concave splayed telescopic mode, the problem that the space of the treatment head is not enough is solved, the field angle of the imaging system can be increased, and the resolution ratio is improved.

Description

Technical Field

[0001] The invention relates to the technical field of X-ray imaging, and in particular to a flat plate telescopic device integrated on a proton therapy head. Background Art

[0002] With the continuous advancement of medical imaging technology, image-guided technology is being used more and more widely in clinical diagnosis and treatment. Accurate and real-time image guidance is essential to ensure the effectiveness and safety of proton therapy. For X-ray imaging systems used for image guidance, the field of view (FOV) is a very critical parameter. Currently, the widely used proton therapy image guidance systems usually use a small field of view to obtain higher-resolution images. However, in clinical diagnosis and treatment, doctors not only need to accurately identify the target area, but also need to fully understand the changes in the surrounding anatomical structures. A small field of view has certain limitations, which means that doctors can only make judgments based on local images during diagnosis and treatment.

[0003] X-ray imaging systems with a larger field of view can better capture image information over a large range, provide a comprehensive perspective, and help doctors monitor treatment effects in real time, thereby more effectively protecting normal tissues and increasing the radiation dose to tumors. However, the expansion of the imaging system's field of view will lead to distortion of the image edges, reduced resolution, and an overall decrease in image quality. In particular, blur or distortion may occur far from the optical axis.

[0004] The difficulty in realizing an X-ray imaging system with a larger field of view is that an X-ray imaging system with a larger field of view will inevitably occupy the space of the treatment head during its integration with the treatment head, and occupying the space of the treatment head will lead to conflicts with the facilities around the treatment head. For example, the existing large FOV imaging system and treatment head integration methods of mature proton therapy companies such as Varian have the following problems: Varian's products use a rotating method to fold the flat-panel detector in an outer arc telescopic manner and stow it on both sides of the treatment head, and during the folding and stowing process, it collides with the facilities around the treatment head. Summary of the invention

[0005] In order to solve the problems existing in the prior art, the present invention proposes a flat telescopic device integrated on a proton therapy head, aiming to solve the problem that an X-ray imaging system with a larger field of view may conflict with facilities around the treatment head during its integration with the treatment head.

[0006] The present invention proposes the following technical solutions to solve the technical problems: A flat telescopic device integrated on a proton therapy head is characterized in that: the flat telescopic device is integrated on both sides of a proton therapy head bracket through a motor and a mechanical transmission system, and is arranged between an inverted trapezoidal front panel and an inverted trapezoidal rear panel on both sides of the proton therapy head; when an imaging system changes from a closed state to a working state, the flat telescopic device is unfolded from top to bottom and from inside to outside along the proton therapy head bracket in an eight-shaped trajectory; when the imaging system changes from a working state to a closed state, the flat telescopic device is retracted from bottom to top and from outside to inside along the proton therapy head bracket in an eight-shaped trajectory, thereby realizing the integration of the flat telescopic device and the proton therapy head bracket in a limited space without interfering with other devices.

[0007] Furthermore, the flat panel telescopic device comprises, from top to bottom, a motor (1), a ball screw (2), a rotating shaft support frame (3), a rotating shaft (4), and a flat panel detector (5); and from both sides to the middle, comprises, from both sides to the middle, a stepped fixed support arm (6), a slider rotating shaft (7), a slider (8), a slider support frame (9), and a slide rail (10); when the flat panel telescopic device changes from a retracted state to a working state, the motor (1) drives the ball screw (2), the ball screw (2) drives the rotating shaft support frame (2), the rotating shaft support frame drives the rotating shaft (4), and the rotating shaft (4) drives the flat panel detector (5). , the flat panel detector (5) drives the slider shafts (7), sliders (8), and slider support frames (9) on both sides to expand from top to bottom and from inside to outside along the slide rail in an "eight" shape; when the flat panel telescopic device changes from a working state to a retracted state, the motor (1) drives the ball screw (2), the ball screw (2) drives the shaft support frame (9), the shaft support frame (9) drives the rotating shaft (4), the rotating shaft (4) drives the flat panel detector (5), and the flat panel detector (5) drives the slider shafts (7), sliders (8), and slider support frames (9) on both sides to contract from bottom to top and from outside to inside along the slide rail in an "eight" shape.

[0008] Furthermore, the upper end of the stepped fixed support arm (6) is connected to the treatment head bracket, and the lower end is connected to the slider shaft (7), the slider (8), and the slider support frame (9); when the flat panel telescopic device changes from a retracted state to an operating state or from an operating state to a retracted state, the position and angle of the stepped fixed support arm (6) remain fixed, but the slider shaft (7), the slider (8), and the slider support frame (9) connected to the stepped fixed support arm (6) rotate upward or downward along the figure-eight trajectory of the flat panel detector.

[0009] Furthermore, the slider support frame (9) and the slider (8) can both rotate along the rotation axis (4) and move relative to the ball screw (2); the slider support frame and the slider are both a rotating pair and a moving pair.

[0010] Furthermore, the guide rail (10) is arranged on the side of the housing of the flat-panel telescopic device, and the guide rail (10) is arranged at 90 degrees to the rotation axis (4), limiting the movement of the slider only on the guide rail, and the movement of the guide rail (10) is controlled by the flat-panel detector, and the movement of the flat-panel detector is limited by the stepped fixed support arms on both sides, thereby limiting the movement trajectory of the flat-panel detector to an eight-shaped movement trajectory.

[0011] Furthermore, the stepped fixed support arm (6) adopts a two-step stepped design, and has a fixed length and position, and extends from the treatment head bracket to limit the movement of the flat-panel detector.

[0012] Furthermore, the total length of the two steps of the stepped fixed support arm (6) and the angle formed by the first step and the last step depend on the position and angle of the flat panel detector when it is in a working state.

[0013] Advantages and effects of the present invention Since the flat-panel telescopic device of the present invention adopts an inwardly concave figure-eight telescopic method, the problem of insufficient space for the treatment head is solved, thereby increasing the field of view of the imaging system and improving the resolution, covering a larger area, so that a wider range of image information can be obtained simultaneously during the patient's treatment, improving the visibility of the tumor target area and its surrounding tissues, helping doctors to make better global assessments and formulate personalized treatment plans, and minimizing the number of times the patient needs to adjust his position during the imaging process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a layout diagram of a flat telescopic device integrated on a proton therapy head according to the present invention; Figure 2 This is a first perspective view of a flat telescopic device integrated on a proton therapy head according to the present invention; Figure 3 A second viewing angle of a flat telescopic device integrated on a proton therapy head according to the present invention; Figure 4 This is a third perspective of a flat telescopic device integrated on a proton therapy head according to the present invention; Figure 5 This is a fourth perspective of a flat telescopic device integrated on a proton therapy head according to the present invention; Figure 6 The fifth perspective of a flat telescopic device integrated on a proton therapy head of the present invention; In the figure, 1: motor; 2: ball screw; 3: rotating shaft support frame; 4: rotating shaft; 5: flat panel detector; 6: stepped fixed support arm; 7: slider shaft; 8: slider; 9: slider support frame; 10: guide rail. DETAILED DESCRIPTION Innovation of the present invention

[0015] 1. The innovation lies in changing the running track of the flat telescopic device from an outward convex arc track to an inward concave "figure eight" track when it is opened or retracted. This solves the problem that the running track of the flat telescopic device will conflict with the facilities around the treatment head during the opening and retracting process due to the tight space around the treatment head. Design principle of the present invention

[0016] First, the mechanical structure of the prior art is much simpler, and only requires a motor + a rotating shaft: the motor is placed at the position of the rotating shaft 4 of the present invention, and the rotation of the motor drives the flat-panel detector 5 to rotate. When the flat-panel detector 5 is in the working state, the motor drives the flat-panel detector 5 to turn right so that the flat-panel detector 5 is opened from top to bottom along the convex arc trajectory. When the flat-panel detector 5 is closed, the motor drives the flat-panel detector 5 to turn left so that the flat-panel detector 5 is closed from bottom to top along the convex arc trajectory. Second, the mechanical structure of the present invention is much more complicated than that of the prior art: ① The motor is moved from the position of the rotating shaft 4 to the top of the ball screw 2 perpendicular to the rotating shaft 4, and the direction of the motor shaft is changed from horizontal to vertical, thereby adding a series of structures matching it: ball screw 4, stepped fixed support arm 6, slider shaft 7, slider 8, slider support frame 9 and guide rail 10. ② Due to the addition of the vertical ball screw 2, the flat panel detector 5 moves up and down along the ball screw 2. For matching, the stepped fixed support arm 6, the slider shaft 7, the slider 8, the slider support frame 9, and the guide rail 10 are added to assist in limiting the trajectory of the flat panel detector. Since the position of the stepped fixed support arm 6 is always fixed, the slider shaft 7, the slider 8, the slider support frame 9, and the guide rail 10 can only rotate with the rotation of the flat panel detector 5, and the motion trajectory of the flat panel detector 5 comes from the up and down movement of the ball screw 2 driven by the motor 1, so the concave "figure eight" trajectory is finally defined.

[0017] Based on the above invention principle, the present invention designs a flat telescopic device integrated on the proton therapy head. Figure 1-6 As shown, the flat-plate telescopic device is integrated on both sides of the proton therapy head bracket through a motor and a mechanical transmission system, and is arranged between the inverted trapezoidal front panel and the inverted trapezoidal rear panel on both sides of the proton therapy head; when the imaging system changes from a closed state to a working state, the flat-plate telescopic device is unfolded from top to bottom and from inside to outside along the proton therapy head bracket in an eight-shaped trajectory; when the imaging system changes from a working state to a closed state, the flat-plate telescopic device is retracted from bottom to top and from outside to inside along the proton therapy head bracket in an eight-shaped trajectory, thereby realizing the integration of the flat-plate telescopic device and the proton therapy head bracket in a limited space without interfering with other devices.

[0018] Supplementary Note 1: First, the figure eight trajectory is as follows Figure 1 As shown, the ball screw 2 is located between the front and rear inverted trapezoidal panels. Figure 1 The ball screw 2 is not visible; Second, since the front and rear inverted trapezoidal panels block the flat-plate telescopic device from moving in the vertical direction, the flat-plate telescopic device is arranged in the gap between the front and rear inverted trapezoidal panels.

[0019] like Figure 3 As shown, the flat panel telescopic device includes, from top to bottom, a motor 1, a ball screw 2, a rotating shaft support frame 2, a rotating shaft 4, and a flat panel detector 5; from both sides to the middle, it includes, in sequence, a stepped fixed support arm 6, a slider rotating shaft 7, a slider 8, a slider support frame 9, and a slide rail 10; when the flat panel telescopic device changes from a retracted state to a working state, the motor 1 drives the ball screw 2, the ball screw 2 drives the rotating shaft support frame 2, the rotating shaft support frame drives the rotating shaft 4, the rotating shaft 4 drives the flat panel detector 5, the flat panel detector 5 drives the slider rotating shafts 7, the slider 8, and the slider support frame 9 on both sides to expand along the slide rail in an eight-shaped shape from top to bottom and from inside to outside; when the flat panel telescopic device changes from a working state to a retracted state, the motor 1 drives the ball screw 2, the ball screw 2 drives the rotating shaft support frame 9, the rotating shaft support frame 9 drives the rotating shaft 4, the rotating shaft 4 drives the flat panel detector 5, the flat panel detector 5 drives the slider rotating shafts 7, the slider 8, and the slider support frame 9 on both sides to shrink along the slide rail in an eight-shaped shape from bottom to top and from outside to inside.

[0020] like Figure 6 As shown, the upper end of the stepped fixed support arm 6 is connected to the treatment head bracket, and the lower end is connected to the slider shaft 7, the slider 8, and the slider support frame 9; when the flat-panel telescopic device changes from the retracted state to the working state or from the working state to the retracted state, the position and angle of the stepped fixed support arm 6 are fixed, but the slider shaft 7, the slider 8, and the slider support frame 9 connected to the stepped fixed support arm 6 rotate upward or downward along the figure-eight trajectory of the flat-panel detector.

[0021] Supplementary Note 2: like Figure 6 As shown, the position and angle of the step-type fixed support arm 6 are fixed, which is the key point of the present invention. Only in this way can the motion trajectory of the slider shaft 7, the slider 8, the slider support frame 9, and the flat panel detector 5 be limited. Here, the transmission force of the slider shaft 7, the slider 8, and the slider support frame 9 comes from the flat panel detector 5, and the transmission force of the flat panel detector 5 comes from the ball screw 2 and the rotating shaft support frame 3, and the driving force of the ball screw 2 comes from the motor 1; like Figure 3 As shown, the slider support frame 9 and the slider 8 can both rotate along the rotating shaft 4 and move relative to the ball screw 2. The slider support frame and the slider are both a rotating pair and a moving pair.

[0022] like Figure 3 As shown, the guide rail 10 is arranged on the side of the flat-panel telescopic device housing, and the guide rail 10 is arranged at 90 degrees to the rotating shaft 4, limiting the slider to move only on the guide rail. The movement of the guide rail 10 is controlled by the flat-panel detector, and the movement of the flat-panel detector is limited by the stepped fixed support arms on both sides, thereby limiting the movement trajectory of the flat-panel detector to an eight-shaped movement trajectory.

[0023] like Figure 5 As shown, the stepped fixed support arm 6 adopts a two-step stepped design, and has a fixed length and position. It extends from the treatment head bracket and serves to limit the movement of the flat-panel detector.

[0024] like Figure 3 As shown, the total length of the two steps of the stepped fixed support arm 6 and the angle formed by the first step and the last step depend on the position and angle of the flat panel detector when it is in the working state.

[0025] It should be emphasized that the above specific embodiments are merely explanations of the present invention, and they are not limitations of the present invention. After reading this specification, those skilled in the art can make modifications to the above embodiments without any creative contribution as needed, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A flat telescopic device integrated on a proton therapy head, characterized in that: The flat-plate telescopic device is integrated on both sides of the proton therapy head bracket through a motor and a mechanical transmission system, and is arranged between the inverted trapezoidal front panel and the inverted trapezoidal rear panel on both sides of the proton therapy head; when the imaging system changes from a closed state to a working state, the flat-plate telescopic device is expanded from top to bottom and from inside to outside along the proton therapy head bracket in an eight-shaped trajectory; when the imaging system changes from a working state to a closed state, the flat-plate telescopic device is contracted from bottom to top and from outside to inside along the proton therapy head bracket in an eight-shaped trajectory, thereby realizing the integration of the flat-plate telescopic device and the proton therapy head bracket in a limited space without interfering with other devices.

2. The flat plate telescopic device integrated on the proton therapy head according to claim 1, characterized in that: The flat panel telescopic device comprises, from top to bottom, a motor (1), a ball screw (2), a rotating shaft support frame (3), a rotating shaft (4), and a flat panel detector (5); and from both sides to the middle, comprises, from both sides to the middle, a stepped fixed support arm (6), a slider rotating shaft (7), a slider (8), a slider support frame (9), and a slide rail (10); when the flat panel telescopic device changes from a retracted state to a working state, the motor (1) drives the ball screw (2), the ball screw (2) drives the rotating shaft support frame (2), the rotating shaft support frame drives the rotating shaft (4), the rotating shaft (4) drives the flat panel detector (5), and the flat panel detector (5) is moved to the working state. The flat detector (5) drives the slider rotating shafts (7), sliders (8) and slider support frames (9) on both sides to expand from top to bottom and from inside to outside along the slide rail in an eight-shaped shape; when the flat telescopic device changes from a working state to a retracted state, the motor (1) drives the ball screw (2), the ball screw (2) drives the rotating shaft support frame (9), the rotating shaft support frame (9) drives the rotating shaft (4), the rotating shaft (4) drives the flat detector (5), and the flat detector (5) drives the slider rotating shafts (7), sliders (8) and slider support frames (9) on both sides to contract from bottom to top and from outside to inside along the slide rail in an eight-shaped shape.

3. The flat plate telescopic device integrated on the proton therapy head according to claim 1, characterized in that: The upper end of the stepped fixed support arm (6) is connected to the treatment head bracket, and the lower end is connected to the slider shaft (7), the slider (8), and the slider support frame (9); when the flat panel telescopic device changes from a retracted state to an operating state or from an operating state to a retracted state, the position and angle of the stepped fixed support arm (6) remain fixed, but the slider shaft (7), the slider (8), and the slider support frame (9) connected to the stepped fixed support arm (6) rotate upward or downward along the figure-eight trajectory of the flat panel detector.

4. The flat plate telescopic device integrated on the proton therapy head according to claim 1, characterized in that: The slider support frame (9) and the slider (8) can both rotate along the rotating shaft (4) and move relative to the ball screw (2); the slider support frame and the slider are both a rotating pair and a moving pair.

5. The flat plate telescopic device integrated on the proton therapy head according to claim 1, characterized in that: The guide rail (10) is arranged on the side of the housing of the flat-panel telescopic device. The guide rail (10) is arranged at 90 degrees to the rotation axis (4), limiting the movement of the slider only on the guide rail. The movement of the guide rail (10) is controlled by the flat-panel detector, and the movement of the flat-panel detector is limited by the stepped fixed support arms on both sides, thereby limiting the movement trajectory of the flat-panel detector to an eight-shaped movement trajectory.

6. The flat plate telescopic device integrated on the proton therapy head according to claim 1, characterized in that: The stepped fixed support arm (6) adopts a two-step stepped design, and has a fixed length and position. It extends from the treatment head bracket and plays a role in limiting the movement of the flat-panel detector.

7. The flat plate telescopic device integrated on the proton therapy head according to claim 6, characterized in that: The total length of the two steps of the stepped fixed support arm (6) and the angle formed by the first step and the last step depend on the position and angle of the flat panel detector when it is in the working state.

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