Curvature adjusting system and method and radiotherapy system

Abstract

The invention relates to a curvature adjusting system and method and a radiotherapy system.The curvature adjusting system is used for adjusting the curvature of an arc-shaped detector and comprises at least one curvature mold arranged on the first side of the arc-shaped detector and configured to have a preset curvature corresponding to a radiation source; and the curvature adjustment control device is arranged on the second side of the arc-shaped detector and is configured to control and push the arc-shaped detector to be attached to the curvature mold, so that the curvature of the arc-shaped detector is adjusted to be the preset curvature corresponding to the curvature mold. The arc-shaped detector is pushed to be attached to the curvature mold of the corresponding radiation source through the curvature adjustment control device, the imaging quality is effectively improved, the preset curvature of the curvature mold is designed according to the characteristics of different radiation sources, the imaging requirements of various radiation sources are met, the detector body does not need to be replaced, the cost is reduced, and the detection efficiency is improved. And the universality and the expansion capability are improved.

Description

Technical Field

[0001] This disclosure relates to the field of medical device technology, specifically to a curvature adjustment system, method, and radiotherapy system. Background Technology

[0002] In the field of X-ray imaging, such as medical radiotherapy and diagnostic imaging, the imaging quality of the detector directly affects the accurate judgment of the target area (such as the tumor area), among which the clarity and accuracy of the detector's edge image are particularly critical. Due to its fixed structure, traditional flat panel detectors are difficult to match with the divergence and focusing characteristics of different radiation sources, such as accelerators, gamma knives, and X-ray tubes. This leads to problems such as image distortion and reduced resolution in the edge areas, affecting the imaging effect.

[0003] Therefore, it is necessary to provide a new technical solution to improve one or more of the problems existing in the above solutions.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] The purpose of this disclosure is to provide a curvature adjustment system, method, and radiotherapy system, thereby overcoming, at least to some extent, one or more problems caused by the limitations and defects of related technologies.

[0006] In a first aspect, this disclosure provides a curvature adjustment system for adjusting the curvature of an arc detector, comprising: At least one curvature mold, the curvature mold being disposed on the first side of the arc-shaped detector and configured to have a preset curvature corresponding to the radiation source; A curvature adjustment control device is located on the second side of the arc-shaped detector and is configured to control and push the arc-shaped detector to fit against the curvature mold, thereby adjusting the curvature of the arc-shaped detector to a preset curvature corresponding to the curvature mold.

[0007] In some embodiments, the curvature adjustment control device includes a plurality of adjustment members, each including a support frame, a push rod, and a first drive device, wherein the support frame is configured to be connected to the mounting base of the arc detector; a first end of the push rod is connected to the first drive device, and a second end faces a second side of the arc detector; the first drive device is disposed on the support frame and configured to drive the second end of the push rod toward or away from the second side of the arc detector.

[0008] In some embodiments, the system further includes an adjustment member support and a second driving device, wherein the adjustment member support is connected to the plurality of adjustment members and is used to support the plurality of adjustment members; and the second driving device is connected to the adjustment member support and is used to drive the plurality of adjustment members to move circumferentially in the frame carrying the radiation source.

[0009] In some embodiments, the system further includes a mold support and a third driving device, wherein the mold support is fixedly connected to the curvature mold for fixing the curvature mold at a position opposite to the radiation source; and the third driving device is drivenly connected to the mold support for driving the curvature mold located on the mold support to move along the radial and / or circumferential directions of the frame carrying the radiation source.

[0010] Secondly, this disclosure provides a radiotherapy system that utilizes the above-described curvature adjustment system, comprising: A radiotherapy device, comprising a gantry, a radiation source, and an arc detector; wherein the radiation source is mounted on the gantry; and the arc detector is mounted on the gantry for receiving the radiation beam emitted by the radiation source. The aforementioned curvature adjustment system is mounted on the frame; wherein the curvature mold is located on the first side of the arc detector, and the curvature adjustment control device is located on the second side of the arc detector.

[0011] In some embodiments, the radiation source includes a first radiation source and a second radiation source, and correspondingly, the curvature mold includes a first curvature mold and a second curvature mold; The first curvature mold and the second curvature mold are respectively disposed at positions opposite to the first radiation source and the second radiation source; The curvature adjustment control device is configured to move circumferentially along the frame with the arc detector to below the first curvature mold or the second curvature mold.

[0012] In some embodiments, the radiotherapy device further includes an arc-shaped guide rail, a mounting plate, and a fourth driving device. The arc-shaped guide rail is disposed on the side of the frame, the curvature adjustment control device and the arc-shaped detector are disposed on the mounting plate, and the fourth driving device is connected to the mounting plate to drive the curvature adjustment control device and the arc-shaped detector to move together circumferentially along the arc-shaped guide rail.

[0013] In some embodiments, the first radiation source is an accelerator, and the second radiation source is a gamma knife.

[0014] Thirdly, this disclosure provides a method for adjusting the curvature of an arc detector in a radiotherapy system, the curvature adjustment method comprising the following steps: The curvature adjustment control device is controlled to push the arc detector to fit against the curvature mold, thereby adjusting the curvature of the arc detector to the preset curvature of the curvature mold.

[0015] In some embodiments, when the radiation source includes a first radiation source and a second radiation source, and correspondingly, the curvature mold includes a first curvature mold and a second curvature mold, the following are included: When the first radiation source is working, the curvature adjustment control device connected to the arc detector is positioned on the side of the first curvature mold away from the first radiation source, and the arc detector is pushed to fit against the first curvature mold so as to adjust the curvature of the arc detector to a first preset curvature. When the second radiation source is working, the curvature adjustment control device connected to the arc detector is positioned on the side of the second curvature mold away from the second radiation source, and the arc detector is pushed to fit into the second curvature mold to adjust the curvature of the arc detector to the second preset curvature.

[0016] The technical solution provided in this disclosure may include the following beneficial effects: This disclosure provides a curvature adjustment system, method, and radiotherapy system. On one hand, the curvature adjustment control device pushes the arc detector to fit with the curvature mold of the corresponding radiation source, so that the curvature of the arc detector is precisely matched with the radiation characteristics of the radiation source, such as divergence angle and focusing mode. This effectively improves the problems of edge image distortion and low resolution of traditional flat panel detectors, and significantly improves the imaging quality. On the other hand, the preset curvature of the curvature mold can be designed separately according to the characteristics of different radiation sources, while the structure of the arc detector and the adjustment control device remains universal. By changing the mold with different preset curvatures, the system can be adapted to the imaging needs of various radiation sources without replacing the detector body, reducing equipment costs and improving the versatility and expandability of the system. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0018] Figure 1 This diagram illustrates the structure of the curvature adjustment system in an exemplary embodiment of this disclosure. Figure 2 This diagram illustrates the structure of the arc-shaped detector in an exemplary embodiment of this disclosure. Figure 3This diagram illustrates the structure of a curvature mold according to an exemplary embodiment of the present disclosure. Figure 4 This diagram illustrates the structure of another curvature mold in an exemplary embodiment of this disclosure; Figure 5 This diagram illustrates the circumferential motion of the curvature adjustment system in an exemplary embodiment of this disclosure. Figure 6 This diagram illustrates a radiotherapy system structure according to an exemplary embodiment of the present disclosure. Figure 7 This diagram illustrates another radiotherapy system structure in an exemplary embodiment of the present disclosure. Figure 8 This diagram illustrates the circumferential motion of the curvature adjustment system in a radiotherapy system according to an exemplary embodiment of this disclosure. Figure 9 A schematic diagram of a third radiotherapy system structure is shown in an exemplary embodiment of this disclosure.

[0019] Reference numerals: 100, curvature adjustment system; 101, curvature mold; 1001, first curvature mold; 1002, second curvature mold; 102, curvature adjustment control device; 1021, adjusting component; 2101, support frame; 2102, push rod; 2103, first driving device; 103, adjusting component support; 200, arc detector; 300, radiation source; 3001, first radiation source; 3002, second radiation source; 400, frame; 401, annular gear ring; 402, arc guide rail. Detailed Implementation

[0020] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that this disclosure will be more comprehensive and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0021] Furthermore, the accompanying drawings are merely illustrative of this disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted. Some block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities may be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0022] It should be noted that the curvature adjustment system provided in this embodiment is executed in a radiotherapy system. The objects processed by the radiotherapy system exist in the form of equipment structure or physical action, such as curvature adjustment and radiation beam reception. In essence, it is a collaborative working process of equipment components, which will not be elaborated here.

[0023] Traditional flat panel detectors (FPDs), as the core component of digital X-ray imaging, are now widely used in medical diagnostics and radiotherapy equipment.

[0024] Traditional flat-panel detectors are generally designed with a flat surface. The radiation beam emitted by the radiation source passes through the object being imaged and falls onto the flat-panel detector. The closer to the edge of the detector, the smaller the angle between the radiation beam emitted by the radiation source and the receiving surface of the flat-panel detector, and the greater the scattering. In addition, the longer the distance from the focal point of the radiation source to the receiving surface of the flat-panel detector, the greater the attenuation. As a result, the closer to the edge of the flat-panel detector, the worse the image quality.

[0025] Advances in scintillators and photoelectric conversion devices within detectors, particularly the development of thin-film transistor (TFT) circuits for photoelectric conversion from glass substrates to flexible polymer substrates, have enabled flat panel detectors to be designed in curved shapes.

[0026] However, regardless of whether it is a flat panel detector or a fixed curvature arc detector, when the same detector is adapted to different radiation sources, due to the different distances of the radiation beam emitted by the radiation source to the detector, there will be a problem that the distance between the focal point of the radiation source and the receiving surface of the detector will become longer. As a result, the attenuation of the radiation beam will be greater, leading to the problem that the image quality is worse closer to the edge of the detector. In addition, there is a lack of curvature adaptation mechanism for multiple radiation sources, resulting in poor equipment versatility and high cost.

[0027] Based on the above-mentioned technical problems, the present disclosure provides a curvature adjustment system, method and radiotherapy system, which achieves precise adjustment of the curvature of the arc detector through the synergistic effect of the curvature mold and the adjustment control device, while being compatible with multiple radiation sources.

[0028] Figure 1 This is a schematic diagram of the structure of a curvature adjustment system provided in an embodiment of this disclosure, with reference to... Figure 1As shown, the curvature adjustment system 100 is used to adjust the curvature of the arc detector 200, and may include: at least one curvature mold 101 and a curvature adjustment control device 102, wherein the curvature mold 101 may be disposed on a first side of the arc detector 200 and configured to have a preset curvature corresponding to the radiation source; the curvature adjustment control device 102 may be disposed on a second side of the arc detector 200 and configured to control the pushing of the arc detector 200 to fit against the curvature mold 101, thereby adjusting the curvature of the arc detector 200 to the preset curvature corresponding to the curvature mold 101. like Figure 2 As shown, the arc detector 200 refers to a detection device that can receive radiation beams and convert them into electrical signals to generate images. The surface of the arc detector 200 can be adapted to different curvatures through the aforementioned curvature adjustment system, thereby allowing the radiation beams to be imaged on surfaces with different curvatures, thus adapting to the imaging requirements of different radiation sources and improving the imaging quality, especially the imaging quality of the detector edges.

[0029] like Figures 3-4 As shown, the curvature mold 101 is a physical structure with a preset curvature. Each curvature mold can be set with a different curvature based on different radiation sources, serving as a reference for adjusting the curvature of the arc detector. The curvature of the curvature mold can be preset according to the characteristics of a specific radiation source, i.e., the preset curvature serves as the curvature of the curvature mold. The curvature mold 101 can be fixed on the frame that carries the radiation source, or it can move along the radial and / or circumferential directions of the frame that carries the radiation source.

[0030] In one embodiment, the curvature mold 101 is made of carbon fiber. It should be understood that carbon fiber has excellent properties such as being lightweight and high-strength, corrosion-resistant, high-temperature resistant, and fatigue-resistant. Its density is much lower than that of metal materials, but its strength is higher than that of metal materials.

[0031] Here, the radiation source is the component that generates the radiation beam. The radiation source can be a therapeutic radiation source or an imaging radiation source. Its radiation characteristics, such as divergence angle and focusing method, have a significant impact on the curvature matching of the detector. There can be one radiation source or multiple radiation sources. Multiple radiation sources can all be imaging radiation sources, all be therapeutic radiation sources, or may include both.

[0032] The first side and the second side of the arc detector 200 refer to the opposite sides of the arc detector 200, wherein the first side is in contact with the curvature mold 101, and the second side is pushed by the curvature adjustment control device 102.

[0033] It is important to understand that when precise imaging of a specific area is required, a curvature mold 101 with a corresponding preset curvature is first selected based on the type of radiation source used. This curvature mold 101 is pre-set on the first side of the arc detector 200. Subsequently, a curvature adjustment control device 102 is positioned on the second side of the arc detector 200 and receives control commands to push the second side of the arc detector 200, generating a uniform and controllable pushing force. Under the action of this pushing force, the arc detector 200 gradually moves closer to the curvature mold 101. As the arc detector 200 and the curvature mold 101 come into contact, the curvature of the arc detector 200 is precisely adjusted to the preset curvature corresponding to the curvature mold 101. In this way, the curvature of the arc detector 200 can be precisely matched with the radiation characteristics of the radiation source, and the distance from the radiation source to the surface of the arc detector is uniform, thereby significantly improving the imaging quality of the detector edge.

[0034] The curvature adjustment system disclosed herein, on the one hand, uses a curvature adjustment control device to push the arc detector to fit with the curvature mold of the corresponding radiation source, so that the curvature of the arc detector is precisely matched with the radiation characteristics of the radiation source, such as divergence angle and focusing method, effectively improving the problems of edge image distortion and low resolution of traditional flat panel detectors, and significantly improving imaging quality; on the other hand, the preset curvature of the curvature mold can be designed separately according to the characteristics of different radiation sources, while the structure of the arc detector and the adjustment control device remains universal. By replacing the mold with different preset curvatures, the system can be adapted to the imaging requirements of various radiation sources without replacing the detector body, reducing equipment costs and improving the versatility and scalability of the system.

[0035] The curvature adjustment system 100 described above in this example embodiment will now be described in more detail.

[0036] In one embodiment, such as Figure 1 As shown, the curvature adjustment control device 102 includes multiple adjusting members 1021, such as three. Each adjusting member 1021 includes a support frame 2101, a push rod 2102, and a first drive device 2103. The support frame 2101 is configured to connect to the mounting base of the arc detector 200 and can move with the movement of the arc detector 200. For example, the support frame 2101 can be connected to the adjusting member support 103 mentioned below. By connecting the adjusting member support 103 to the mounting base of the arc detector 200, the curvature adjustment control device 102 can move with the circumferential movement of the arc detector 200 along the frame. The first end of the push rod 2102 is connected to the first drive device 2103, and the second end faces the second side of the arc detector 200. The first drive device 2103 is disposed on the support frame 2101 and is used to drive the second end of the push rod 2102 to move closer to or away from the second side of the arc detector 200.

[0037] It is important to understand that the pushing force of the multiple adjusting components 1021 on the arc detector 200 can be distributed to multiple points. When the first driving device 2103 drives the second end of the push rod 2102 to push the second side of the arc detector 200, the push rod 2102 applies a pushing force to the arc detector 200, causing it to move towards the curvature mold 101. Because the multiple adjusting components 1021 work together, it ensures that the arc detector 200 is subjected to uniform force during the pushing process, thereby ensuring that the arc detector 200 can smoothly and accurately conform to the curvature mold 101, achieving accurate adjustment of the curvature.

[0038] In one embodiment, the curvature adjustment control device 102 may include two, three or more adjustment elements 1021, which are evenly distributed along the second side of the arc detector 200.

[0039] In one embodiment, the first driving device 2103 can be a stepper motor or a servo motor, which causes the push rod 2102 to move linearly. Alternatively, the first driving device 2103 can be a linear motor, with the first end of the push rod 2102 coaxially connected to the linear extension part of the linear motor. When the arc detector 200 needs to be adjusted to a preset curvature, the control system calculates the distance that each push rod 2102 needs to move according to the preset curvature, and then drives the corresponding first driving device 2103 to execute precisely, so that the arc detector 200 smoothly fits onto the curvature mold 101.

[0040] In one embodiment, a plurality of adjustment members 1021 are configured to be evenly distributed on the second side of the arc detector 200. It should be understood that each of the plurality of adjustment members 1021 maintains approximately equal spacing or exhibits spatial symmetry to ensure that the arc detector 200 is subjected to uniform thrust during curvature adjustment, avoiding local stress concentration.

[0041] In another embodiment, the system further includes an adjustment support 103 and a second drive device. The adjustment support 103 is connected to a plurality of adjustment elements 1021 (such as a support frame 2101 for the adjustment elements 1021) for supporting the plurality of adjustment elements 1021. The second drive device (such as a servo motor) is connected to the adjustment support 103 for driving the plurality of adjustment elements 1021 to move circumferentially in the frame carrying the radiation source.

[0042] Understandably, multiple adjusting components 1021 can be directly mounted on the frame via adjusting component supports 103, thereby moving circumferentially along the frame.

[0043] In one specific embodiment, the frame is a ring structure, and a ring gear 401 is disposed on the end face of the frame. The output shaft of the second drive device (such as a servo motor) is connected to a drive gear, which meshes with the ring gear 401. Simultaneously, the second drive device is fixed to the adjusting support 103. When the second drive device rotates, the drive gear rolls along the ring gear 401, causing the adjusting support 103 to move circumferentially relative to the frame 600 along the ring gear 401. More specifically, an arc-shaped guide rail 402 is disposed on the end face of the ring structure of the frame, and the ring gear 401 is disposed on the outer ring of the arc-shaped guide rail 402 (such as a servo motor). Figure 5 As shown, the system also includes a slider, which is connected to the adjusting support 103 and the arc-shaped guide rail 402. In this way, the adjusting support 103 can move stably in the circumferential direction along the arc to the frame 600.

[0044] By adjusting the second drive device, multiple adjusting components 1021 can be driven to move circumferentially on the frame 600. Figure 5 The dotted line represents the position of multiple adjustment components 1021 in the circumferential movement of the radiotherapy equipment gantry. The arc detector 200 can be adjusted to the optimal position according to different treatment needs.

[0045] It should be understood that by adding the adjusting member support 103 and the second driving device, the overall position adjustment of the multiple adjusting members 1021 is achieved, improving the flexibility and adaptability of the curvature adjustment system 100. The adjusting member support 103 is configured to connect with the multiple adjusting members 1021, providing an integral support structure for the multiple adjusting members 1021, ensuring the stability and consistency of the multiple adjusting members 1021 during movement.

[0046] In one embodiment, the system further includes a mold support and a third drive device. The mold support is fixedly connected to the curvature mold 101 for fixing the curvature mold 101 at a position opposite to the radiation source. The third drive device is drivenly connected to the mold support for driving the curvature mold 101 located on the mold support to move along the radial and / or circumferential directions of the frame carrying the radiation source.

[0047] The third driving device can drive the mold support to move radially along the gantry of the radiotherapy equipment, thereby adjusting the distance between the curvature mold 101 and the radiation source and changing the size of the imaging field; and / or, the third driving device can drive the mold support to move circumferentially along the gantry of the radiotherapy equipment, thereby adjusting the position of the curvature mold 101 in the circumferential direction.

[0048] It should be understood that the third drive device can be a motor, cylinder or hydraulic cylinder, etc. By controlling the movement of the third drive device, the position of the curvature mold 101 can be precisely adjusted to adapt to different radiotherapy / imaging needs.

[0049] By setting up a mold support and a third driving device, the position of the curvature mold 101 is adjustable. In practical applications, the mold support can be driven by the third driving device to precisely adjust the position of the curvature mold 101 according to different radiotherapy / imaging needs, so that the arc detector 200 can better receive the radiation beam emitted by the radiation source, thereby improving the accuracy and effect of radiotherapy.

[0050] In one specific embodiment, the third driving device includes a linear motor and / or a drive motor, which are mounted on a mold support. One end of the linear extension portion of the linear motor is detachably connected to the mold support. The linear motor pushes the mold support to move the curved mold 101 radially, thereby changing the distance between the arc detector 200 and the radiation source, and thus adjusting the imaging field range. The output shaft of the drive motor is equipped with a drive gear. A slider is fixedly connected to the mold support. The end face of the frame 400 is equipped with a ring gear 401 and an arc-shaped guide rail 402. The drive gear of the drive motor meshes with the ring gear 401. The rotation of the output wheel of the drive motor drives the mold support to move circumferentially along the arc-shaped guide rail 402.

[0051] This disclosure also provides a radiotherapy system. Figure 6 This is a schematic diagram of a radiotherapy system provided in an embodiment of the present disclosure. The radiotherapy system can adjust the curvature of the arc detector 200 of the radiotherapy device according to the radiation source 300 using a curvature adjustment system 100, thereby improving edge image quality. The radiotherapy system includes: a radiotherapy device and the aforementioned curvature adjustment system 100.

[0052] The radiotherapy equipment includes a gantry 400, a radiation source 300, and an arc detector 200; wherein the radiation source 300 is mounted on the gantry 400; the arc detector 200 is mounted on the gantry 400 and is used to receive the radiation beam emitted by the radiation source 300; the curvature adjustment system 100 is mounted on the gantry 400, wherein the curvature mold 101 in the curvature adjustment system 100 is located on the first side of the arc detector 200, and the curvature adjustment control device 102 in the curvature adjustment system 100 is located on the second side of the arc detector 200.

[0053] The gantry 400 in the radiotherapy equipment can be a ring structure. The radiation source 300 and the arc detector 200 are respectively mounted on the gantry 400 and can rotate with the rotation of the gantry 400. The radiation source 300 is used to emit a radiation beam, which can be a therapeutic radiation source or an imaging radiation source. The radiation source 300 can be any one of an accelerator, gamma knife, and X-ray tube. The arc detector 200 is used to receive the radiation beam and convert it into an electrical signal to generate a projected image, and its curvature is adjustable. The curvature mold 101 of the curvature adjustment system 100 is set opposite to the radiation source 300. The curvature adjustment control device 102 is located below the arc detector 200. By pushing the arc detector 200 to fit with the curvature mold 101, a perpendicular receiving relationship is formed for the radiation beam emitted from the focal point of the radiation source 300 throughout the entire detection area from the center point to the edge of the receiving surface of the arc detector 200. That is, the distance from the focal point to the detector surface is equal, eliminating the distance difference of the radiation beam reaching the detector receiving surface and improving the consistency of image quality across the entire arc surface.

[0054] The various parts of the radiotherapy system described in this example embodiment will now be described in more detail.

[0055] The system includes a radiotherapy device and the aforementioned curvature adjustment system 100. The radiotherapy device's gantry 400 houses components such as a radiation source 300, an arc detector 200, and an arc guide rail 402. The curvature adjustment system 100 works in conjunction with these components to meet the radiotherapy requirements of different radiation sources 300. During radiotherapy, different radiation sources 300 may be required for irradiation, and different radiation sources 300 may require different curvature molds 101 to cooperate with the arc detector 200.

[0056] In one embodiment, the radiation source 300 can be one or more, such as Figure 7 and Figure 8 As shown, the radiation source 300 includes a first radiation source 3001 and a second radiation source 3002. Correspondingly, the curvature mold 101 includes a first curvature mold 1001 and a second curvature mold 1002. The first curvature mold 1001 and the second curvature mold 1002 are respectively disposed at positions opposite to the first radiation source 3001 and the second radiation source 3002. The curvature adjustment control device 102 is configured to move circumferentially along the frame 400 together with the arc detector 200 to a position below the first curvature mold 1001 or the second curvature mold 1002.

[0057] It is important to understand that the radiation source 300 comprises two independent entities: the first radiation source 3001 and the second radiation source 3002. Correspondingly, the curvature mold 101 in the curvature adjustment system 100 is also configured in two sets: the first curvature mold 1001 and the second curvature mold 1002. The two sets of curvature molds are fixed in positions directly opposite their respective radiation sources. The arc center of the first curvature mold 1001 is aligned with the ray emission center of the first radiation source 3001, and the arc center of the second curvature mold 1002 is aligned with the ray emission center of the second radiation source 3002. This ensures that each mold can match the ray characteristics of its corresponding radiation source, such as divergence angle and focusing method.

[0058] When the first radiation source 3001 is working, the arc-shaped detector 200 and the curvature adjustment control device 102 located below the arc-shaped detector 200 are moved together along the circumference of the frame 400 to below the first curvature mold 1001 (or the arc-shaped detector 200 and the curvature adjustment control device 102 are located below the first curvature mold 1001 by default). The curvature adjustment control device 102 is controlled to push the arc-shaped detector 200 to fit against the first curvature mold 1001, forming a first preset curvature adapted to the first radiation source 3001. When the second radiation source 3002 is working, the arc-shaped detector 200 and the curvature adjustment control device 102 are moved together along the circumference of the frame 400 to below the second curvature mold 1002. The curvature adjustment control device 102 is controlled to push the arc-shaped detector 200 to fit against the second curvature mold 1002, forming a second preset curvature adapted to the second radiation source 3002.

[0059] Figure 8 The dotted line indicates that the arc detector 200 and the curvature adjustment control device 102 have moved to the area below the second curvature mold 1002, perfectly covering the needs of multiple types of radiotherapy, greatly improving the functional compatibility of the system, and overcoming the problem that traditional radiotherapy systems often need to be equipped with multiple arc detectors to adapt to different types of radiation sources, which increases equipment costs.

[0060] In one embodiment, the radiotherapy device further includes an arc-shaped guide rail 402, a mounting plate, and a fourth drive device. The arc-shaped guide rail 402 is disposed on the side (i.e., end face) of the frame 400. The curvature adjustment control device 102 and the arc detector 200 are disposed on the mounting plate (the mounting plate may be the aforementioned adjustment support 103). The fourth drive device is connected to the mounting plate and is used to drive the curvature adjustment control device 102 and the arc detector 200 to move together circumferentially along the arc-shaped guide rail 402.

[0061] It is important to understand that the arc-shaped guide rail 402 is fixedly mounted on the side of the radiotherapy equipment frame 400. Its curvature matches the annular structure of the frame 400, and its extension range can cover the circumferential positions corresponding to all radiation sources, providing trajectory constraints for movement. The mounting plate, as an integrated load-bearing carrier, integrates the curvature adjustment control device 102 and the arc detector 200 into a whole. Both are fixed to the mounting plate by rigid connections such as bolts, ensuring that their relative positions remain unchanged during movement and avoiding adjustment function failure due to displacement deviation. The fourth drive device, as the core of power output, is directly connected to the mounting plate. Its power output direction is adapted to the extension direction of the arc-shaped guide rail 402 and is specifically used to drive the mounting plate to move circumferentially along the arc-shaped guide rail 402. The fourth drive device can be a drive motor.

[0062] In one embodiment, the first radiation source 3001 is an accelerator, and the second radiation source 3002 is a gamma knife. It should be understood that the accelerator generates high-energy X-rays for intensity-modulated radiotherapy (IMRT). The gamma knife emits gamma rays for stereotactic radiotherapy. By combining the accelerator and gamma knife in the same radiotherapy system, it is possible to treat different types of tumors, expanding the therapeutic range of the radiotherapy system and improving treatment efficacy.

[0063] It is also necessary to understand that, such as Figure 9 As shown, the radiation source 300 comprises two independent entities: a first radiation source 3001 and a second radiation source 3002. Correspondingly, the curvature mold 101 in the curvature adjustment system 100 is also configured in two sets: a first curvature mold 1001 and a second curvature mold 1002. The first curvature mold 1001 and the second curvature mold 1002 are respectively equipped with an arc detector 200 and a curvature adjustment control device 102. When the first radiation source 3001 is working, the curvature adjustment control device 102 pushes the arc detector 200 to conform to the first curvature mold 1001 and adapt to the curvature of the radiation source; when switching to the second radiation source 3002, the curvature adjustment control device 102 pushes the arc detector 200 to conform to the second curvature mold 1002 and adapt to the curvature of the radiation source.

[0064] The third aspect of this disclosure provides a method for adjusting the curvature of an arc detector in a radiotherapy system, the method comprising the following steps: The curvature adjustment control device pushes the arc detector to fit into the curvature mold, adjusting the curvature of the arc detector to the preset curvature of the curvature mold.

[0065] The curvature adjustment method provided in this disclosure is applied to the control device of a radiotherapy system, which may be a processor, server, etc. This control device can communicate with the radiotherapy equipment and the curvature adjustment system, controlling the collaborative operation of each component. It is applicable to scenarios where the radiotherapy equipment is equipped with only a single radiation source and scenarios where the radiotherapy equipment is equipped with multiple radiation sources, enabling rapid curvature adaptation when switching between different radiation sources.

[0066] In one embodiment, when the radiation source includes a first radiation source and a second radiation source, and correspondingly, the curvature mold includes a first curvature mold and a second curvature mold, the method includes: When the first radiation source is working, that is, when the first radiation source is about to emit a beam, the curvature adjustment control device connected to the arc detector is positioned on the side of the first curvature mold away from the first radiation source, and the arc detector is pushed to fit into the first curvature mold so as to adjust the curvature of the arc detector to the first preset curvature.

[0067] When the second radiation source is working, that is, when the second radiation source is about to emit a beam, the curvature adjustment control device connected to the arc detector is positioned on the side of the second curvature mold away from the second radiation source, and the arc detector is pushed to fit into the second curvature mold so as to adjust the curvature of the arc detector to the second preset curvature.

[0068] Specifically, when the first radiation source is about to emit a beam, the curvature adjustment system executes the curvature adjustment process corresponding to the first radiation source. First, the fourth drive device is controlled to move the mounting plate along the arc-shaped guide rail, moving the arc-shaped detector and the curvature adjustment control device to below the first curvature mold. The first curvature mold is pre-fixed in a position opposite to the first radiation source by a mold support, with its arc center aligned with the radiation emission center of the first radiation source. After moving into position, the control device sends a drive command to the first drive device of the curvature adjustment control device. Multiple push rods extend synchronously, applying a uniform thrust to the second side of the arc-shaped detector, pushing the arc-shaped detector closer to and completely fitting the first curvature mold, adjusting the curvature of the arc-shaped detector to the first preset curvature. After adjustment, the fitting status and curvature accuracy are checked. Once confirmed to be qualified, a first radiation source beam emission permission signal is sent to the radiotherapy equipment. The radiotherapy system starts the first radiation source and begins irradiating the tumor. The arc-shaped detector receives the radiation beam and generates an image.

[0069] After the first radiation source completes beam emission, the curvature adjustment control device releases the arc detector from the first curvature mold to prepare for switching to the second radiation source. The control device sends a reverse drive command to the first drive unit, causing the push rod to slowly retract and cease applying thrust to the arc-shaped detector. The arc-shaped detector, under its own elasticity, returns to its initial deformable state and separates from the first curvature mold. Simultaneously, the control device controls the fourth drive unit to move the mounting plate along the arc-shaped guide rail, moving the arc-shaped detector and the curvature adjustment control device below the second curvature mold. The second curvature mold is pre-fixed to a position opposite the second radiation source via a mold support, with its arc center aligned with the radiation emission center of the second radiation source. After positioning, the control device sends a drive command to the first drive unit of the curvature adjustment control device, causing multiple push rods to extend synchronously, applying uniform thrust to the second side of the arc-shaped detector, pushing it closer to and completely fitting the second curvature mold, thus adjusting the curvature of the arc-shaped detector to the second preset curvature. After adjustment, the fitting status and curvature accuracy are checked. Once confirmed as qualified, a second radiation source beam emission permission signal is sent to the radiotherapy equipment. The radiotherapy system activates the second radiation source and begins irradiating the tumor. The arc-shaped detector receives the radiation beam and generates an image.

[0070] Throughout the treatment process, the imaging quality of the arc detector and the working status of each component are monitored in real time. If a decrease in imaging quality is detected, or if an increase in the gap between the arc detector and the curvature mold is detected, the thrust of the curvature adjustment control device needs to be adjusted in time. By increasing the extension length of the push rod, the thrust on the arc detector is increased to ensure that the arc detector and the curvature mold always maintain a complete fit. If a malfunction of the drive device is detected, a pause signal needs to be sent to the radiotherapy system immediately to stop the radiation source from emitting beams. The treatment task can only be continued after the fault is eliminated to ensure the safety and accuracy of the treatment.

[0071] The foregoing primarily describes the solutions of the embodiments of this disclosure from a methodological perspective. It is understood that, in order to achieve the aforementioned functions, the control device and radiotherapy equipment of the radiotherapy system include corresponding hardware structures and / or software modules for executing each function. Those skilled in the art should readily recognize that, in conjunction with the units and algorithm steps of the various examples described in the embodiments disclosed herein, the embodiments of this disclosure can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed by hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the embodiments of this disclosure.

[0072] The foregoing primarily describes the solutions of the embodiments of this disclosure from a methodological perspective. It is understood that, in order to achieve the aforementioned functions, the control device and radiotherapy equipment of the radiotherapy system include corresponding hardware structures and / or software modules for executing each function. Those skilled in the art should readily recognize that, in conjunction with the units and algorithm steps of the various examples described in the embodiments disclosed herein, the embodiments of this disclosure can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed by hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the embodiments of this disclosure.

[0073] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0074] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0075] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein.

Claims

1. A curvature adjustment system, characterized by, A curvature adjustment system for adjusting curvature of an arc-shaped detector, comprising: at least one curvature mold arranged on a first side of the arc-shaped detector and configured to have a preset curvature corresponding to a radiation source; a curvature adjustment control device arranged on a second side of the arc-shaped detector and configured to control pushing the arc-shaped detector to fit the curvature mold so as to adjust the curvature of the arc-shaped detector to the preset curvature corresponding to the curvature mold.

2. The curvature adjustment system of claim 1, wherein, The curvature adjustment control device comprises a plurality of adjustment members, each of which comprises a support frame, a pushing rod and a first driving device, wherein the support frame is configured to be connected with a mounting base of the arc-shaped detector; the pushing rod is connected with the first driving device at a first end and extends towards the second side of the arc-shaped detector at a second end; and the first driving device is arranged on the support frame and configured to drive the second end of the pushing rod to move towards or away from the second side of the arc-shaped detector.

3. The curvature adjustment system of claim 1, wherein, The system further comprises an adjustment member support connected with the plurality of adjustment members for supporting the plurality of adjustment members, and a second driving device connected with the adjustment member support for driving the plurality of adjustment members to move circumferentially around a gantry carrying the radiation source.

4. The curvature adjustment system of claim 1, wherein, The system further comprises a mold support fixedly connected with the curvature mold for fixing the curvature mold at a position opposite to the radiation source, and a third driving device drivingly connected with the mold support for driving the curvature mold on the mold support to move in a radial direction and / or a circumferential direction of the gantry carrying the radiation source.

5. A radiotherapy system, characterized by, A radiotherapy system, comprising: a radiotherapy device comprising a gantry, a radiation source and an arc-shaped detector, wherein the radiation source is arranged on the gantry, and the arc-shaped detector is arranged on the gantry and configured to receive a radiation beam emitted by the radiation source; the curvature adjustment system according to any one of claims 1 to 4, which is arranged on the gantry, wherein the curvature mold is arranged on a first side of the arc-shaped detector, and the curvature adjustment control device is arranged on a second side of the arc-shaped detector.

6. The radiotherapy system of claim 5, wherein, The radiation source comprises a first radiation source and a second radiation source, and correspondingly, the curvature mold comprises a first curvature mold and a second curvature mold; the first curvature mold and the second curvature mold are arranged at positions opposite to the first radiation source and the second radiation source, respectively; the curvature adjustment control device is configured to move circumferentially around the gantry to be below the first curvature mold or the second curvature mold together with the arc-shaped detector.

7. The radiotherapy system according to claim 6, wherein the radiotherapy device further comprises an arc-shaped guide rail arranged on a side of the gantry, a mounting plate on which the curvature adjustment control device and the arc-shaped detector are arranged, and a fourth driving device connected with the mounting plate and configured to drive the curvature adjustment control device and the arc-shaped detector to move circumferentially around the arc-shaped guide rail.

8. The radiotherapy system of claim 5, wherein, The first radiation source is an accelerator, and the second radiation source is a gamma knife.

9. A method of curvature adjustment applied to the system of any one of claims 5 to 8, characterized in that, A radiotherapy device, comprising: The curvature adjustment control device is controlled to push the arc-shaped detector to be attached to the curvature mold, and curvature of the arc-shaped detector is adjusted to be the preset curvature of the curvature mold.

10. The curvature adjustment method of claim 9, wherein, When the radiation source comprises a first radiation source and a second radiation source, and correspondingly, the curvature mold comprises a first curvature mold and a second curvature mold, the method comprises: When the first radiation source is working, the curvature adjustment control device connected to the arc-shaped detector is controlled to be located on a side of the first curvature mold away from the first radiation source, and the arc-shaped detector is pushed to be attached to the first curvature mold, so that curvature of the arc-shaped detector is adjusted to be a first preset curvature; When the second radiation source is working, the curvature adjustment control device connected to the arc-shaped detector is controlled to be located on a side of the second curvature mold away from the second radiation source, and the arc-shaped detector is pushed to be attached to the second curvature mold, so that curvature of the arc-shaped detector is adjusted to be a second preset curvature.

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