A flat panel retraction device integrated on a proton therapy head

Abstract

The application discloses a flat plate telescopic device integrated on a proton treatment head, characterized in that the flat plate telescopic device is integrated on both sides of a proton treatment head support 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 treatment head; when an imaging system changes from a closed state to a working state, the flat plate telescopic device is unfolded along the proton treatment head support in an eight-shaped track from top to bottom and from inside to outside; when the imaging system changes from the working state to the closed state, the flat plate telescopic device is folded along the proton treatment head support in the eight-shaped track from bottom to top and from outside to inside, so that the integration of the flat plate telescopic device and the proton treatment head support is the integration in a limited space without interference with other devices. Since the flat plate telescopic device adopts the concave eight-shaped telescopic mode, the problem of insufficient space of the treatment head is solved, and the field angle of the imaging system can be increased and the resolution can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of X-ray imaging technology, and in particular to a flat panel telescopic device integrated on a proton therapy head. BACKGROUND

[0002] With the continuous progress of medical imaging technology, image-guided technology is increasingly widely used in clinical diagnosis and treatment. Accurate and real-time image guidance is crucial 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. The proton therapy image-guided systems widely used at present usually use a small FOV 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 structure. Small FOV has certain limitations, resulting in doctors being able to only judge based on local images during diagnosis and treatment.

[0003] Using an X-ray imaging system with a larger FOV can better capture image information in a large range, provide a comprehensive perspective, and help doctors monitor treatment effectiveness in real time, thereby more effectively protecting normal tissues and increasing the irradiation dose of tumors. However, the expansion of the FOV of the imaging system leads to image edge distortion, resolution degradation, and overall image quality degradation. In particular, at a distance away from the optical axis, blurring or distortion may occur.

[0004] The difficulty in implementing an X-ray imaging system with a larger FOV lies in that the integration of the X-ray imaging system with a larger FOV into a therapy head inevitably occupies the space of the therapy head, and the occupation of the space of the therapy head leads to conflicts with facilities around the therapy head. For example, the existing large FOV imaging system of Varian and other mature proton therapy companies has the following problems in integration with the therapy head: the product of Varian adopts a rotating mode to fold the flat panel detector outward in an arc telescopic mode on both sides of the therapy head, and the folding and telescoping process of the outward arc telescopic mode collides with the facilities around the therapy head. SUMMARY

[0005] To solve the problems in the prior art, the present application provides a flat panel telescopic device integrated on a proton therapy head, which aims to solve the problem that the integration of an X-ray imaging system with a larger FOV into a therapy head leads to conflicts with facilities around the therapy head.

[0006] The present application provides the following technical solutions to solve the technical problems:

[0007] The plate telescopic device integrated on the proton treatment head is characterized in that: the plate telescopic device is integrated on both sides of the proton treatment head support 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 treatment head; when the imaging system changes from the closed state to the working state, the plate telescopic device expands along the proton treatment head support in an eight-shaped track from top to bottom and from inside to outside; when the imaging system changes from the working state to the closed state, the plate telescopic device contracts along the proton treatment head support in an eight-shaped track from bottom to top and from outside to inside, so that the integration of the plate telescopic device and the proton treatment head support is the integration in a limited space without interference with other devices.

[0008] Further, the plate telescopic device sequentially comprises a motor (1), a ball screw (2), a rotating shaft support frame (3), a rotating shaft (4) and a plate detector (5) from top to bottom; sequentially comprises a stepped fixed support arm (6), a sliding block rotating shaft (7), a sliding block (8), a sliding block support frame (9) and a sliding rail (10) from both sides to the middle; when the plate telescopic device changes from the closed state to the 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 plate detector (5), the plate detector (5) drives the sliding block rotating shaft (7), the sliding block (8) and the sliding block support frame (9) on both sides to expand in an eight-shaped track from top to bottom and from inside to outside along the sliding rail; when the plate telescopic device changes from the working state to the closed 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 plate detector (5), the plate detector (5) drives the sliding block rotating shaft (7), the sliding block (8) and the sliding block support frame (9) on both sides to contract in an eight-shaped track from bottom to top and from outside to inside along the sliding rail.

[0009] Further, the upper end of the stepped fixed support arm (6) is connected with the treatment head support, and the lower end is connected with the sliding block rotating shaft (7), the sliding block (8) and the sliding block support frame (9); when the plate telescopic device changes from the closed state to the working state or from the working state to the closed state, the position and the angle of the stepped fixed support arm (6) are fixed and do not move, but the sliding block rotating shaft (7), the sliding block (8) and the sliding block support frame (9) connected with the stepped fixed support arm (6) rotate upward or downward along with the eight-shaped track of the plate detector.

[0010] Further, the sliding block support frame (9) and the sliding block (8) can rotate along the rotating shaft (4) and can move relative to the ball screw (2), so that the sliding block support frame and the sliding block are both rotating pairs and moving pairs.

[0011] Further, the guide rail (10) is arranged on the side of the flat plate telescopic device shell, the guide rail (10) is arranged at 90 degrees with the rotating shaft (4), the movement of the sliding block is limited on the guide rail, the movement of the guide rail (10) is controlled by the flat plate detector, the movement of the flat plate detector is limited by the stepped fixed support arms on both sides, so that the movement track of the flat plate detector is an eight-shaped movement track.

[0012] Further, the stepped fixed support arm (6) adopts a two-stage stepped design, and the length and position are fixed, and is extended from the treatment head support to limit the movement of the flat plate detector.

[0013] Further, the total length of the two steps of the stepped fixed support arm (6) and the included angle formed by the first step and the last step depend on the position and angle of the flat plate detector in the working state.

[0014] Advantages and effects of the present application

[0015] Since the flat plate telescopic device adopts the concave eight-shaped telescopic mode, the problem of insufficient space of the treatment head is solved, and the field of view of the imaging system can be increased, the resolution can be improved, and a larger area can be covered, so that more image information in a larger range can be obtained during the treatment of the patient, the visibility of the tumor target area and the surrounding tissue is improved, the doctor can better perform global evaluation, and a personalized treatment plan can be made to reduce the number of times of adjusting the position of the patient during the imaging process. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A flat plate telescopic device integrated on a proton treatment head according to the present application is shown in the layout diagram;

[0017] Figure 2 A first perspective view of the flat plate telescopic device integrated on the proton treatment head according to the present application is shown;

[0018] Figure 3 A second perspective view of the flat plate telescopic device integrated on the proton treatment head according to the present application is shown;

[0019] Figure 4 A third perspective view of the flat plate telescopic device integrated on the proton treatment head according to the present application is shown;

[0020] Figure 5 A fourth perspective view of the flat plate telescopic device integrated on the proton treatment head according to the present application is shown;

[0021] Figure 6 A fifth perspective view of the flat plate telescopic device integrated on the proton treatment head according to the present application is shown;

[0022] 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: sliding block rotating shaft; 8: sliding block; 9: sliding block support frame; 10: guide rail. DETAILED DESCRIPTION

[0023] Innovative points of the present application

[0024] 1. The innovative point is that the running track of the flat panel retracting device is changed from the outward convex arc track to the inward concave "figure-eight" track when the flat panel retracting device is opened or retracted. Thus, the problem that the running track of the flat panel retracting device conflicts with the facilities around the treatment head due to the space around the treatment head being tight during the opening and retraction of the flat panel retracting device is solved.

[0025] Design principle of the present application

[0026] Firstly, the mechanical structure of the prior art is relatively simple, only a motor + rotating shaft is needed: the motor is placed at the position of the rotating shaft 4 of the present application, 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 rotate to the right, so that the flat panel detector 5 completes opening from top to bottom along the outward convex arc track, when the flat panel detector 5 is in the closed state, the motor drives the flat panel detector 5 to rotate to the left, so that the flat panel detector 5 completes closing from bottom to top along the outward convex arc track. Secondly, the mechanical mechanism of the present application is much more complex 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, the direction of the motor shaft is changed from horizontal to vertical, thereby a series of structures matched therewith are added: the ball screw 4, the stepped fixed support arm 6, the sliding block rotating shaft 7, the sliding block 8, the sliding block support frame 9 and the guide rail 10. ② Since the vertical ball screw 2 is added, the flat panel detector 5 moves up and down along the ball screw 2, in order to match, the stepped fixed support arm 6, the sliding block rotating shaft 7, the sliding block 8, the sliding block support frame 9 and the guide rail 10 which limit the track of the flat panel detector are also added. Since the position of the stepped fixed support arm 6 is always fixed, the sliding block rotating shaft 7, the sliding block 8, the sliding block support frame 9 and the guide rail 10 can only rotate with the rotation of the flat panel detector 5, and the movement track 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 inward concave "figure-eight" track is finally limited.

[0027] Based on the above application principle, the present application designs a flat panel retracting device integrated on a proton treatment head as shown in the figure Figures 1-6As shown, the features are: the flat plate telescopic device is integrated on both sides of the proton therapy head support through the motor and 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 the closed state to the working state, the flat plate telescopic device expands along the proton therapy head support in the form of an eight-shaped trajectory from top to bottom and from inside to outside; when the imaging system changes from the working state to the closed state, the flat plate telescopic device contracts along the proton therapy head support in the form of an eight-shaped trajectory from bottom to top and from outside to inside, so as to realize the integration of the flat plate telescopic device and the proton therapy head support in a limited space without interference with other devices.

[0028] Supplementary note 1:

[0029] First, the eight-shaped trajectory is as shown in Figure 1 The ball screw 2 is in the middle of the front and rear inverted trapezoidal panels, so Figure 1 The ball screw 2 cannot be seen;

[0030] Second, since the front and rear inverted trapezoidal panels block the movement of the flat plate telescopic device along the vertical direction, the flat plate telescopic device is arranged in the gap between the front and rear inverted trapezoidal panels.

[0031] As shown in Figure 3 The flat plate telescopic device includes, in order from top to bottom: a motor 1, a ball screw 2, a rotating shaft support frame 2, a rotating shaft 4, and a flat plate detector 5; from both sides to the middle, it includes, in order: a stepped fixed support arm 6, a sliding block rotating shaft 7, a sliding block 8, a sliding block support frame 9, and a sliding rail 10; when the flat plate telescopic device changes from the retracted state to the 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 plate detector 5, and the flat plate detector 5 drives the sliding block rotating shaft 7, the sliding block 8, and the sliding block support frame 9 on both sides to expand in the form of an eight-shaped trajectory from top to bottom and from inside to outside along the sliding rail; when the flat plate telescopic device changes from the working state to the 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 plate detector 5, and the flat plate detector 5 drives the sliding block rotating shaft 7, the sliding block 8, and the sliding block support frame 9 on both sides to contract in the form of an eight-shaped trajectory from bottom to top and from outside to inside along the sliding rail.

[0032] As shown in Figure 6 The upper end of the stepped fixed support arm 6 is connected to the therapy head support, and the lower end is connected to the sliding block rotating shaft 7, the sliding block 8, and the sliding block support frame 9; when the flat plate 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 and do not move, but the sliding block rotating shaft 7, the sliding block 8, and the sliding block support frame 9 connected to the stepped fixed support arm 6 rotate upward or downward along with the eight-shaped trajectory of the flat plate detector.

[0033] Supplementary Note 2:

[0034] like Figure 6 As shown, the key point of this invention is that the position and angle of the stepped fixed support arm 6 remain fixed. Only in this way can the movement trajectory of the slider shaft 7, slider 8, slider support frame 9, and flat plate detector 5 be limited. Here, the power transmission of the slider shaft 7, slider 8, and slider support frame 9 comes from the flat plate detector 5, the power transmission of the flat plate 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.

[0035] like Figure 3 As shown, the slider support frame 9 and the slider 8 can rotate along the rotation axis 4 and move relative to the ball screw 2. The slider support frame and the slider are both a rotary pair and a sliding pair.

[0036] like Figure 3 As shown, the guide rail 10 is arranged on the side of the shell of the flat plate telescopic device. The guide rail 10 is arranged at a 90-degree angle to the rotation axis 4, which limits the slider to move only on the guide rail. The movement of the guide rail 10 is controlled by the flat plate detector. The movement of the flat plate detector is limited by the stepped fixed support arms on both sides, thus limiting the movement trajectory of the flat plate detector to a figure-eight movement trajectory.

[0037] like Figure 5 As shown, the stepped fixed support arm 6 adopts a two-stage stepped design, and its length and position are fixed. It extends from the treatment head support and plays a role in limiting the movement of the flat panel detector.

[0038] like Figure 3 As shown, the total length of the two steps of the stepped fixed support arm 6 and the included 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 working state.

[0039] It should be emphasized that the above specific embodiments are merely explanations of the present invention and are not intended to limit the present invention. After reading this specification, those skilled in the art can make modifications to the above embodiments without contributing any inventive step, 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 panel retraction device integrated on a proton therapy head, characterized by: The flat plate telescoping device is integrated on both sides of the proton therapy head support 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 the closed state to the working state, the flat plate telescoping device expands along the proton therapy head support in an eight-shaped track from top to bottom and from inside to outside. When the imaging system changes from the working state to the closed state, the flat plate telescoping device contracts along the proton therapy head support in an eight-shaped track from bottom to top and from outside to inside, so that the integration of the flat plate telescoping device and the proton therapy head support is achieved in a limited space without interference with other devices.

2. A flat panel retracting device integrated on a proton therapy head according to claim 1, characterized in that: The flat plate telescoping device sequentially comprises a motor (1), a ball screw (2), a rotating shaft support frame (3), a rotating shaft (4) and a flat plate detector (5) from top to bottom. The flat plate telescoping device sequentially comprises a stepped fixed support arm (6), a sliding block rotating shaft (7), a sliding block (8), a sliding block support frame (9) and a guide rail (10) from both sides to the middle. When the flat plate telescoping device changes from the retracted state to the working state, the motor (1) drives the ball screw (2), the ball screw (2) drives the rotating shaft support frame (3), the rotating shaft support frame (3) drives the rotating shaft (4), the rotating shaft (4) drives the flat plate detector (5), the flat plate detector (5) drives the sliding block rotating shaft (7), the sliding block (8) and the sliding block support frame (9) on both sides to expand in an eight-shaped track from top to bottom and from inside to outside along the guide rail. When the flat plate telescoping device changes from the working state to the retracted state, the motor (1) drives the ball screw (2), the ball screw (2) drives the sliding block support frame (9), the sliding block support frame (9) drives the rotating shaft (4), the rotating shaft (4) drives the flat plate detector (5), the flat plate detector (5) drives the sliding block rotating shaft (7), the sliding block (8) and the sliding block support frame (9) on both sides to contract in an eight-shaped track from bottom to top and from outside to inside along the guide rail.

3. A flat panel retraction device integrated on a proton therapy head according to claim 2, wherein: The upper end of the stepped fixed support arm (6) is connected to the head support, and the lower end is connected to the sliding block rotating shaft (7), the sliding block (8) and the sliding block support frame (9). When the flat plate telescoping 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 sliding block rotating shaft (7), the sliding block (8) and the sliding block support frame (9) connected to the stepped fixed support arm (6) rotate upward or downward along with the eight-shaped track of the flat plate detector.

4. The flat panel retracting device integrated on a proton therapy head according to claim 2, characterized in that: The sliding block support frame (9) and the sliding block (8) can rotate along the rotating shaft (4) and can move relative to the ball screw (2), so the sliding block support frame and the sliding block are both rotating pairs and moving pairs.

5. The flat panel retracting device integrated on a proton therapy head according to claim 2, wherein: The guide rail (10) is arranged on the side of the flat plate telescoping device shell, and the guide rail (10) is arranged at 90 degrees to the rotating shaft (4), so that the sliding block can only move on the guide rail. The movement of the guide rail (10) is controlled by the flat plate detector, and the movement of the flat plate detector is limited by the stepped fixed support arms on both sides, so that the movement track of the flat plate detector is an eight-shaped movement track.

6. The flat panel retracting device integrated on a proton therapy head according to claim 2, wherein: The stepped fixed support arm (6) is designed in two steps, and the length and position are fixed, extending from the treatment head support to limit the movement of the flat panel detector.

7. A flat panel retraction device integrated on a proton therapy head according to claim 6, wherein: The total length of the two steps of the stepped fixed support arm (6) and the included angle formed by the first step and the last step depend on the position and angle of the flat panel detector in the working state.

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