Quality control device and radiotherapy system

Abstract

The application discloses a quality control device and a radiotherapy system, and relates to the technical field of medical equipment, and aims to solve the problems that the radiotherapy system cannot automatically detect various parameters of a treatment head and cannot timely find faults of the treatment head. The quality control device is applied to the radiotherapy system, the radiotherapy system comprises a gantry and a treatment head, the treatment head comprises a first treatment head and a second treatment head which are oppositely arranged on the gantry, and the quality control device is arranged on the gantry and is used for performing quality control on the treatment head. The quality control device comprises a detector assembly and a driving assembly, the driving assembly can drive the detector assembly to move in a direction perpendicular to a first direction, the arrangement direction of the first treatment head and the second treatment head is the first direction, so that the detector assembly is switched between a working position and an avoiding position; in the working position, the detector assembly can receive a beam emitted by the first treatment head and / or the second treatment head.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a quality control device and a radiotherapy system. Background Technology

[0002] Radiation therapy is a treatment method for tumors that uses high-energy rays to kill or control the growth of cancer cells in order to treat tumors.

[0003] In related technologies, radiotherapy equipment used for radiotherapy is typically equipped with multiple treatment heads to emit the same or different rays in order to improve the treatment effect on patients. However, during the operation of radiotherapy equipment, parameters such as the ray energy of the treatment head, as well as the size and precision of the radiation field, all affect the treatment effect. However, the radiotherapy equipment in related technologies cannot automatically detect various parameters of the treatment head, which may lead to the failure to detect problems with the treatment head in a timely manner. Utility Model Content

[0004] The purpose of this application is to provide a quality control device and a radiotherapy system, which aims to solve the problem that radiotherapy systems cannot automatically detect various parameters of the treatment head and cannot detect treatment head malfunctions in a timely manner.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] In a first aspect, this application provides a quality control device applied to a radiotherapy system. The radiotherapy system includes a gantry and treatment heads. The treatment heads include a first treatment head and a second treatment head disposed opposite to each other on the gantry. The quality control device is disposed on the gantry and is used to perform quality control on the treatment heads. The quality control device includes a detector assembly and a drive assembly. The drive assembly is capable of driving the detector assembly to move along a direction perpendicular to a first direction, which is the arrangement direction of the first treatment head and the second treatment head, so that the detector assembly switches between a working position and an avoidance position. In the working position, the detector assembly is capable of receiving the beam emitted by the first treatment head and / or the second treatment head.

[0007] The quality control device of this application can perform individual or simultaneous quality control tests on the two treatment heads of a device including dual treatment heads. By driving the detector assembly, it can automatically move to the working position before or periodically to receive the beam emitted by the treatment head, so as to carry out quality inspection of the treatment head, so as to detect abnormalities in the performance of the treatment head in a timely manner (such as beam deviation, inaccurate dosage, etc.), so as to avoid the treatment effect on the patient due to equipment malfunction. It can also detect abnormalities in advance through periodic quality inspection, and carry out maintenance to avoid delaying the treatment progress.

[0008] In some embodiments, the detector assembly includes a first surface capable of receiving a beam emitted by either a first treatment head or a second treatment head.

[0009] In some embodiments, the detector assembly further includes a second surface that is opposite to the first surface along a first direction;

[0010] In the working position, the first surface is capable of receiving a beam emitted by either the first treatment head or the second treatment head, and the second surface is capable of receiving a beam emitted by the other of the first treatment head and the second treatment head.

[0011] In some embodiments, the detector assembly includes a first plate having a first surface and a second surface;

[0012] Alternatively, the detector assembly includes a first plate and a second plate, the first plate having a first surface and the second plate having a second surface, the first plate and the second plate being disposed opposite to each other along a first direction such that the first surface and the second surface are opposite to each other.

[0013] In some embodiments, the quality control device further includes a support component, which includes:

[0014] A support plate is mounted on the frame, and the support plate includes a guide rail pair;

[0015] The tray is slidably connected to the guide rail pair so that the tray can slide relative to the support plate, and the detector assembly is set on the tray.

[0016] In some embodiments, the drive assembly includes a motor and a lead screw, the lead screw being connected to the output shaft of the motor and the lead screw being driven to the detector assembly, the motor being able to drive the lead screw to rotate to switch the detector assembly between a working position and an avoidance position.

[0017] In some embodiments, the quality control device further includes a position monitoring device for detecting whether the detector assembly has moved to a working position or an avoidance position.

[0018] Secondly, this application provides a radiotherapy system, which includes a gantry and a treatment head, the treatment head being used to emit a beam to a target area, the treatment head including a first treatment head and a second treatment head disposed opposite to each other on the gantry; and a quality control device for any of the above technical solutions.

[0019] Since the radiotherapy system provided in this application includes the quality control device of any of the above technical solutions, both can solve the same technical problems and achieve the same results.

[0020] In some embodiments, the treatment head is an accelerator treatment head and / or a gamma ray treatment head.

[0021] In some embodiments, the first treatment head is an accelerator treatment head, and the second treatment head is a gamma ray treatment head; along the arrangement direction of the accelerator treatment head and the gamma ray treatment head, the quality control device is located between the radiotherapy isocenter of the accelerator treatment head and the gamma ray treatment head.

[0022] In some embodiments, the radiotherapy system further includes an imaging device comprising: a radiation source and an imaging detector disposed opposite to each other on a gantry, the radiotherapy system imaging detector being used to receive the beam emitted by the radiation source and to perform imaging; and in an avoidance position, the beam paths of the quality control device and the radiation source are staggered. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of a partial structure of a radiotherapy system provided in an embodiment of this application;

[0025] Figure 2 This application provides a front view of a partial structure of a radiotherapy system, wherein the detector assembly is located in the working position;

[0026] Figure 3 A front view of a partial structure of a radiotherapy system provided in an embodiment of this application, wherein the detector assembly is located in an avoidance position;

[0027] Figure 4 This is a schematic diagram of another part of the structure of a radiotherapy system provided in an embodiment of this application;

[0028] Figure 5 This is a schematic diagram of a quality control device provided in an embodiment of this application.

[0029] Figure label:

[0030] 100. Radiotherapy system;

[0031] 1. Quality control device; 11. Detector assembly; 111. First surface; 112. Second surface; 12. Drive assembly; 121. Lead screw; 13. Support assembly; 131. Support plate; 132. Guide rail pair; 133. Support plate; 1331. Connecting part;

[0032] 2. Rack;

[0033] 31. First treatment head; 32. Second treatment head;

[0034] 4. Imaging device; 41. X-ray source; 42. Imaging detector. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] It should be noted that in practical applications, due to limitations in equipment precision or installation errors, achieving absolute parallelism or perpendicularity is difficult. The descriptions of "perpendicular," "parallel," or "in the same direction" in this application are not absolute limitations, but rather indicate that a vertical or parallel structural arrangement can be achieved within a preset error range, achieving the corresponding preset effect. This maximizes the technical effect of the defined features and makes the corresponding technical solution easy to implement, possessing high feasibility. For example, "perpendicular" includes absolute perpendicularity and near-perpendicularity, where the acceptable deviation range for near-perpendicularity can be, for example, within 5°. "Parallel" includes absolute parallelism and near-parallelism, where the acceptable deviation range for near-parallelism can also be, for example, within 5°. "In the same direction" includes absolute same direction and near-same direction, where the acceptable deviation range for near-same direction can also be, for example, within 5°.

[0037] In the description of the embodiments of this application, "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 indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "multiple" means two or more.

[0038] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "communication" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or a communication between the internal components of two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0039] In the description of embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, article, or apparatus that includes that element.

[0040] In the description of the embodiments in this application, the words "exemplary" or "for example" are used to indicate that they are examples, illustrations, or descriptions. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design options. Specifically, the use of the words "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0041] Radiation therapy is a treatment method for cancer that primarily uses high-energy rays to kill or control the growth of cancer cells, thereby treating the tumor. A radiation therapy system is a medical device used for cancer treatment that uses high-energy rays (such as X-rays, gamma rays, or particle beams, including protons and heavy ions) to kill cancer cells or inhibit their growth.

[0042] Related technologies have found that the duration of a single radiotherapy session can be shortened by increasing the number of treatment heads mounted on the gantry to expand the range of conditions for which a radiotherapy system can be used (e.g., dual treatment heads facing each other) and by increasing the dose rate. During the operation of the radiotherapy system 100, parameters such as the radiation energy, dose output accuracy, and field size and shape of the treatment heads are crucial to the patient's treatment outcome. Inaccuracies in these parameters can lead to poor treatment results or damage to healthy tissues. However, the dual-head opposing radiotherapy systems in related technologies do not consider quality control, making automated quality control difficult. Therefore, it is necessary to test various parameters of the treatment heads in the radiotherapy system to conduct effective quality control and ensure treatment effectiveness.

[0043] Based on the above, see Figures 1-5 This application provides a quality control device 1, which can be used in a radiotherapy system 100. The radiotherapy system 100 may include a gantry 2 and a treatment head. The treatment head includes a first treatment head 31 and a second treatment head 32 disposed opposite to each other on the gantry 2.

[0044] The quality control device 1 is located on the rack 2 and is used to perform quality control on the treatment head. In this way, the quality control device 1 can periodically or at stages such as before treatment by the radiotherapy system 100 to perform quality control tests on the relatively set first treatment head 31 and / or second treatment head 32, so as to detect abnormal parameters of the first treatment head 31 and / or second treatment head 32 in a timely manner. The quality control device 1 helps to ensure that the first treatment head 31 and / or second treatment head 32 can have a good therapeutic effect.

[0045] The quality control device 1 includes a detector assembly 11 and a drive assembly 12. The drive assembly 12 can drive the detector assembly 11 to move in a direction perpendicular to a first direction, which is the arrangement direction of the first treatment head 31 and the second treatment head 32, so that the detector assembly 11 can switch between a working position and a recusal position. In the working position, the detector assembly 11 can receive the beam emitted by the first treatment head 31 and / or the second treatment head 32. In the recusal position, the detector assembly 11 cannot receive the beam emitted by the first treatment head 31 and / or the second treatment head 32.

[0046] The first direction can be seen in the e2 direction in the figure, and the movement direction of the detector component 11 can be seen in the e1 direction in the figure.

[0047] The drive component 12 can serve as a power source to effectively drive the detector component 11 to switch between the working position and the avoidance position. In this way, through the cooperation of the drive component 12 and the detector component 11, the quality control device 1 can automatically carry out quality control detection on the treatment head, and promptly detect abnormal parameters of the first treatment head 31 and / or the second treatment head 32. This allows the quality control device 1 to help ensure that the first treatment head 31 and / or the second treatment head 32 have good treatment effects.

[0048] When the detector component 11 receives the beam emitted from the treatment head, it can generate corresponding image data to distinguish whether there is any abnormality in the treatment head.

[0049] The detector assembly 11 is capable of receiving beams emitted from the first treatment head 31 and / or the second treatment head 32, including the following scenarios: the detector assembly 11 can receive the beam emitted from the first treatment head 31 to perform quality control on the first treatment head 31; or, the detector assembly 11 can receive the beam emitted from the second treatment head 32 to perform quality control on the second treatment head 32; or, the detector assembly 11 can receive the beam emitted from the first treatment head 31 to perform quality control on the first treatment head 31; or, the detector assembly 11 can simultaneously receive the beams emitted from the first treatment head 31 and the second treatment head 32 to perform quality control on both the first treatment head 31 and the second treatment head 32.

[0050] For example, before the radiotherapy system 100 performs treatment on the patient, the drive assembly 12 drives the detector assembly 11 from the avoidance position to the working position. In the working position, the detector assembly 11 simultaneously receives the beams emitted by the first treatment head 31 and the second treatment head 32 to achieve quality control of the first treatment head 31 and the second treatment head 32. After the quality control is completed, the drive assembly 12 drives the detector assembly 11 from the working position back to the avoidance position to avoid the patient.

[0051] Typically, the patient support device of the radiotherapy system 100 moves in a direction perpendicular to the arrangement of the first treatment head 31 and the second treatment head 32 so that the patient can receive radiotherapy. Based on this, by moving the detector assembly in a direction perpendicular to the arrangement of the first treatment head 31 and the second treatment head 32, the detector assembly can be moved to an avoidance position to effectively avoid the patient.

[0052] Optionally, detector assembly 11 may include an MV-level detector, such as an electronic field imaging device; or, detector assembly 11 may include a KV-level detector.

[0053] Optionally, the detector assembly 11 may include a flat panel detector or an arc-shaped detector.

[0054] For example, the quality control device 1 can be used to perform daily or monthly inspections of the treatment head. The quality control device 1 can be used to detect the field size, accuracy, energy variations, etc., of the treatment head. For instance, the treatment head includes a collimation assembly, which may optionally be a collimation cone and / or a multi-leaf grating.

[0055] When the collimation component includes a multi-leaf grating, the quality control device 1 can perform quality control on the shape, size, number, and leaf movement speed of the shooting field.

[0056] When the collimation assembly includes a collimation cone, the quality control device 1 can perform quality control on the shape, size, number, etc. of the firing field.

[0057] In some embodiments, the treatment head includes an accelerator and a collimation assembly, the collimation assembly including a collimation cone and a multi-leaf grating, and the quality control device 1 can perform quality control on the shape, size, number, and leaf movement speed of the treatment head's radiation field.

[0058] The quality control device 1 of this application can perform individual or simultaneous quality control tests on the two treatment heads of the device including dual treatment heads. Under the driving action of the drive component 12, the detector component 11 can automatically move to the working position before or periodically to receive the beam emitted by the treatment head in order to carry out quality testing on the treatment head, so as to detect abnormalities in the performance of the treatment head in a timely manner (such as beam deviation, inaccurate dosage, etc.), so as to avoid affecting the treatment effect on the patient due to equipment abnormalities. It can also detect abnormalities in advance through periodic quality inspections, carry out maintenance, and avoid delaying the treatment progress.

[0059] See Figures 1-3 In some optional embodiments, the frame 2 can be a rotating frame, such as a roller. Rotation of the frame 2 allows for multi-angle irradiation of the target area. Furthermore, when the frame 2 is a rotating frame, the movement direction of the quality control device 1 can also be perpendicular to the rotation axis S1 of the rotating support.

[0060] See Figures 1-3 In some alternative embodiments, the frame 2 is a roller with mounting holes extending through the peripheral wall of the roller along the thickness direction of the roller, and the detector assembly 11 can move between a working position and a avoidance position through the mounting holes.

[0061] Thus, when the quality control device 1 needs to perform quality control on the treatment head, the detector assembly 11 can move from the clearance position outside the roller to the working position inside the roller through the mounting hole; when the quality control device 1 finishes quality control, the detector assembly 11 can move from the working position inside the roller to the clearance position outside the roller through the mounting hole.

[0062] By providing mounting holes, the external space of the frame 2 can be fully utilized to accommodate part of the structure of the quality control device 1.

[0063] See Figures 1-5 In some embodiments, the detector assembly 11 includes a first surface 111 capable of receiving a beam emitted by either the first treatment head 31 or the second treatment head 32. That is, the first surface 111 can be opposite to either the first treatment head 31 or the second treatment head 32. For example, the first surface 111 can be opposite to the first treatment head 31 along the arrangement direction of the first and second treatment heads 32. In this way, the detector assembly 11 can receive the beam emitted by either the first treatment head 31 or the second treatment head 32 for quality control of either the first treatment head 31 or the second treatment head 32.

[0064] For example, the detector assembly 11 includes an MV flat panel detector located between the first treatment head 31 and the second treatment head 32 along the arrangement direction of the two. The MV flat panel detector includes a first surface 111 facing the first treatment head 31 or the second treatment head 32 to receive the beam emitted by the first treatment head 31 or the second treatment head 32.

[0065] For example, the first surface 111 has a coating that can be used to receive the rays of the beam. For example, the coating can be a coating that receives X-rays or a coating that receives gamma rays.

[0066] By setting a first surface 111 capable of receiving the beam from the first treatment head 31 or the second treatment head 32, the detector assembly 11 can effectively receive the beam, thereby achieving effective quality control detection of the first treatment head 31 or the second treatment head 32.

[0067] See Figures 1-3 and combined Figure 5 In some embodiments, the detector assembly 11 further includes a second surface 112, which is opposite to the first surface 111 along a first direction, which is the arrangement direction of the first treatment head 31 and the second treatment head 32.

[0068] In the working position, the first surface 111 is capable of receiving a beam emitted from either the first treatment head 31 or the second treatment head 32, and the second surface 112 is capable of receiving a beam emitted from the other of the first treatment head 31 and the second treatment head 32.

[0069] The detector assembly 11 is located between the first treatment head 31 and the second treatment head 32 along a first direction. For example, the first surface 111 may be opposite to the first treatment head 31 to receive the beam of the first treatment head 31, and the second surface 112 may be opposite to the second treatment head 32 to receive the beam of the second treatment head 32; or, the first surface 111 may be opposite to the second treatment head 32 to receive the beam of the second treatment head 32, and the second surface 112 may be opposite to the first treatment head 31 to receive the beam of the first treatment head 31.

[0070] For example, the detector assembly 11 includes an MV flat panel detector located between the first treatment head 31 and the second treatment head 32 along the arrangement direction of the two. The MV flat panel detector includes a first surface 111 and a second surface 112. The first surface 111 faces the first treatment head 31 and is opposite to the first treatment head 31, and the second surface 112 faces the second treatment head 32 and is opposite to the second treatment head 32.

[0071] For example, both the first surface 111 and the second surface 112 have a coating that can be used to receive the rays of the beam. For instance, the coatings on the first surface 111 and the second surface 112 may be different types; the coating on the first surface 111 may be a coating that receives X-rays, and the coating on the second surface 112 may be a coating that receives gamma rays.

[0072] By setting a first surface 111 or a second surface 112 that are opposite to each other along the first direction, the quality control device 1 can simultaneously receive the beams from the first treatment head 31 and the second treatment head 32, thereby enabling effective quality control detection of both the first treatment head 31 and the second treatment head 32 simultaneously.

[0073] In some embodiments, the detector assembly 11 includes a first plate having a first surface 111 and a second surface 112. That is, the first plate is a double-sided plate.

[0074] Optionally, the first tablet can be an MV tablet or a KV tablet.

[0075] By simultaneously setting the first surface 111 and the second surface 112 on the first plate, the number of components of the quality control device 1 is reduced, which helps to simplify the installation operation and improve the installation production efficiency.

[0076] In some embodiments, the detector assembly 11 includes a first plate and a second plate. The first plate has a first surface 111, and the second plate has a second surface 112. The first plate and the second plate are arranged opposite to each other along a first direction, such that the first surface 111 and the second surface 112 are opposite to each other. That is, the first plate and the second plate are each single-sided plates.

[0077] Optionally, both the first and second tablets can be MV tablets or KV tablets.

[0078] By setting the first surface 111 and the second surface 112 on the first plate and the second plate respectively, the molding difficulty of the first plate and the second plate is reduced.

[0079] See Figures 1-3 and combined Figure 5 In some embodiments, the quality control device 1 further includes a support assembly 13, which can be used to support the drive assembly 12 and the detector assembly 11. The support assembly 13 includes a support plate 131 and a tray 133. The support plate 131 is disposed on the frame 2 and includes a guide rail pair 132. The tray 133 is slidably connected to the guide rail pair 132 so that the tray 133 is slidable relative to the support plate 131. The detector assembly 11 is disposed on the tray 133. The drive assembly 12 can drive the tray 133 to slide relative to the support plate 131, thereby causing the detector assembly 11 to move between a working position and a clearance position relative to the support plate 131.

[0080] Optionally, the guide rail pair 132 is disposed on the surface of the support plate 131 along the thickness direction of the support plate 131, and the support plate 133 is provided with a slider, which is housed in the guide rail of the guide rail pair 132 so that the support plate 133 is slidably connected to the support plate 131.

[0081] In some alternative embodiments, the detector assembly 11 includes a first plate and a second plate. The first plate has a first surface 111 and the second plate has a second surface 112. The first plate and the second plate are respectively disposed on two sides of the support plate 133 along the thickness direction of the support plate 133, that is, the first direction is parallel to the thickness direction of the support plate 133.

[0082] In some alternative embodiments, the detector assembly 11 includes a first plate having a first surface 111 and a second surface 112, and a support plate 133 having a through hole extending through its surface along the thickness direction of the support plate 133. The first plate is mounted in the through hole so that the first surface 111 and the second surface 112 can be exposed through the through hole to receive the beam emitted from the treatment head.

[0083] By setting the support component 13, the installation stability and movement smoothness of the detector component 11 can be improved, which is conducive to the detector component 11 being able to switch stably between the working position and the avoidance position.

[0084] See Figure 1 and Figure 5 In some embodiments, the drive assembly 12 includes a motor and a lead screw 121. The lead screw 121 is connected to the output shaft of the motor and is drively connected to the detector assembly 11. The motor can drive the lead screw 121 to rotate so as to switch the detector assembly 11 between the working position and the avoidance position.

[0085] The lead screw 121 can be directly or indirectly connected to the detector assembly 11. For example, the central control device includes a support plate 133, on which the detector assembly 11 is disposed. The support plate 133 is connected to the lead screw 121, thereby enabling the detector assembly 11 to be connected to the lead screw 121. Specifically, the support plate 133 has a connecting portion 1331 located on its side wall. The connecting portion 1331 has a threaded connection hole, and the lead screw 121 is threadedly connected to the connecting portion 1331, allowing the lead screw 121 to drive the support plate 133 to move between a working position and a clearance position, thereby enabling the detector assembly 11 to switch between the working position and the clearance position.

[0086] For example, before the radiotherapy system 100 performs treatment on the patient, the drive assembly 12 drives the detector assembly 11 from the avoidance position to the working position. In the working position, the detector assembly 11 simultaneously receives the beams emitted by the first treatment head 31 and the second treatment head 32 to achieve quality control of the first treatment head 31 and the second treatment head 32. After the quality control is completed, the drive assembly 12 drives the detector assembly 11 from the working position back to the avoidance position to avoid the patient.

[0087] See Figure 1 and Figure 5 In some optional embodiments, the quality control device 1 includes a support plate 131 and a tray 133. The support plate 131 is disposed on the frame 2, and the tray 133 is slidably connected to the support plate 131 so that the tray 133 is slidable relative to the support plate 131. The detector assembly 11 is disposed on the tray 133. The motor and lead screw 121 of the drive assembly 12 are disposed on the outer side wall of the support plate 131 to drive the detector assembly 11 to switch between a working position and a avoidance position.

[0088] By setting up a motor and lead screw 121, the lead screw 121 can ensure that the detector assembly 11 is always accurately moved to the working position and the storage position during multiple movements, thereby improving the accuracy of the quality control device 1.

[0089] In some embodiments, the quality control device 1 further includes a position monitoring device (not shown in the figure), which is used to detect whether the detector assembly 11 has moved to a working position or an avoidance position.

[0090] Optionally, the position monitoring device may include a monitoring element and a trigger element that cooperate with each other. The monitoring element is fixed to the support plate 131, and the trigger element is disposed on the support plate 133. The support plate 133 can drive the trigger element and the detector assembly 11 to move synchronously. When the detector assembly 11 moves to the working position and / or the storage position, the trigger element can trigger the monitoring element and send a signal.

[0091] Optionally, the position monitoring device includes a first position monitoring device and a second position monitoring device spaced apart along the movement direction parallel to the quality control device 1. The first position monitoring device is used to detect whether the detector assembly 11 has moved to the working position, and the second detection device is used to detect whether the detector assembly 11 has moved to the avoidance position. The first position monitoring device includes a first monitoring element and a first triggering element, and the second position monitoring device includes a second monitoring element and a second triggering element. The first monitoring element and the second monitoring element are spaced apart on the support plate 131, and the first triggering element and the second triggering element are spaced apart on the support plate 133.

[0092] See Figures 1-4This application also provides a radiotherapy system 100, which includes a gantry 2, a treatment head, and the aforementioned quality control device 1. The treatment head is used to emit a beam to a target area. The treatment head includes a first treatment head 31 and a second treatment head 32 disposed opposite to each other on the gantry 2. The quality control device 1 is disposed on the gantry 2 for quality control of the treatment head.

[0093] In radiotherapy, the target area refers to the region that needs to receive a sufficient dose of radiation to kill or control the growth of cancer cells. It is one or more specific areas defined on the target subject based on the type, location, size, and spread of the tumor. The target subject can be a patient or a phantom simulating a patient.

[0094] In some optional embodiments, the gantry can be a rotating gantry, such as a roller gantry, ring gantry, C-arm gantry, drum gantry, gantry, or other types of gantry, which is not specifically limited in this application. The treatment head can rotate with the rotation of the gantry 2 to perform radiotherapy on the target area. The rotation of the gantry can achieve multi-angle irradiation of the target area.

[0095] Optionally, the treatment head can be directly mounted on the rack 2, or it can be indirectly connected to the rack, such as by being mounted on other devices connected to the rack 2.

[0096] The first treatment head 31 and the second treatment head 32 are positioned opposite each other on the frame 2, so that the first treatment head 31 and the second treatment head 32 can shield each other. That is, when one of the first treatment head 31 and the second treatment head 32 emits a beam, the other can play a certain degree of physical shielding or scattering suppression role at the opposite position, thereby reducing unnecessary radiation leakage or interference, and reducing the adverse effects of radiation leakage on the non-target tissues of the operator and the patient.

[0097] Furthermore, the first treatment head 31 and the second treatment head 32 can shield each other, eliminating the need for additional shielding components, which helps reduce the overall weight of the radiotherapy system 100.

[0098] By incorporating the aforementioned quality control device 1, the radiotherapy system 100 can automatically perform quality control checks on the relatively positioned first treatment head 31 and / or second treatment head 32 of the radiotherapy system 100, in order to avoid poor treatment effects or damage to the patient's healthy tissues due to abnormal parameters of the first treatment head 31 and / or second treatment head 32.

[0099] See Figure 4 In some embodiments, the treatment head is an accelerator treatment head and / or a gamma ray treatment head.

[0100] Optionally, the first treatment head 31 and the second treatment head 32 can be the same, that is, the first treatment head 31 and the second treatment head 32 can both be accelerator treatment heads or gamma ray treatment heads. The first treatment head 31 and the second treatment head 32 can also be different, for example, the first treatment head 31 is a gamma ray treatment head and the second treatment head 32 is an accelerator treatment head.

[0101] Accelerator therapy heads are typically used to generate high-energy X-rays or electron beams, suitable for treating deep tumors, while gamma ray therapy heads are mainly used to emit gamma rays. For example, gamma ray therapy heads use gamma rays generated by a cobalt-60 source to treat tumors. Gamma ray therapy heads are good at localized irradiation with small areas and high doses, and are more suitable for certain types of cancer (such as brain tumors). In this way, the therapy heads can provide targeted treatment for different application scenarios.

[0102] See Figures 1-4 In some embodiments, the first treatment head 31 is an accelerator treatment head, and the second treatment head 32 is a gamma ray treatment head. Along the arrangement direction of the accelerator treatment head and the gamma ray treatment head, the quality control device 1 is located between the radiotherapy isocenter of the accelerator treatment head and the gamma ray treatment head.

[0103] During the operation of the radiotherapy system 100, the use of either an accelerator treatment head or a gamma ray treatment head can be flexibly selected based on the specific condition of different patients, or the use of both can be switched as needed within the same treatment course. By combining these two different types of treatment heads, doctors can select the most suitable type of radiation based on the specific location, depth, and characteristics of the tumor, thereby improving the effectiveness of the treatment.

[0104] In the above embodiment, the gantry is a rotating gantry. The isocenter of the accelerator treatment head is typically located near the target area, so that regardless of how the gantry 2 rotates, the beams from the accelerator treatment head will converge at or very close to this point. The quality control device 1 is located near the isocenter of the accelerator treatment head, which helps improve the accuracy of quality control of the accelerator treatment head by the quality control device 1.

[0105] When the detector assembly 11 receives the beam from the gamma ray treatment head to form image data for detecting anomalies, the closer the detector assembly 11 is to the gamma ray treatment head, the higher the accuracy of quality control for the gamma ray treatment head.

[0106] Based on the above, by positioning the quality control device 1 between the radiotherapy center of the accelerator treatment head and the gamma ray treatment head, the quality control device 1 can simultaneously maintain high accuracy in quality control of both the accelerator treatment head and the gamma ray treatment head, thereby effectively exerting the quality control effect of the quality control device 1.

[0107] See Figures 1-3 In other embodiments, the radiotherapy system 100 further includes an imaging device 4, which includes a radiation source 41 and an imaging detector 42 disposed opposite to each other on the gantry 2. The imaging detector 42 of the radiotherapy system 100 is used to receive the beam emitted by the radiation source 41 and perform imaging. In the avoidance position, the beam paths of the quality control device 1 and the radiation source 41 are staggered.

[0108] Optionally, the imaging device 4 may include at least one of MRI (Magnetic Resonance Imaging), CT (Computed Tomography), PET (Positron Emission Tomography), or other types of imaging devices, or a combination of at least two of them, which can image the target object.

[0109] It should be noted that an MRI device is a medical device that uses strong magnetic fields and radio frequency waves to generate detailed images of the internal structure of the human body; a CT device is a medical device that uses X-rays to take cross-sectional images of the body from multiple angles; and a PET device is a medical device that generates images by imaging the distribution of radioactive tracers within the body.

[0110] It is understood that the number of imaging devices 4 can be one or more, and the specific number can be selected according to the actual situation. This application does not make any specific limitation in this regard.

[0111] By setting the beam paths of the quality control device 1, which is located in a clearance position, and the X-ray source 41 to be staggered, the quality control device 1 is prevented from affecting the normal operation of the imaging device 4.

[0112] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0113] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A quality control device applied to a radiotherapy system, the radiotherapy system comprising a gantry and a treatment head, the treatment head comprising a first treatment head and a second treatment head disposed opposite to each other on the gantry, characterized in that, The quality control device is mounted on the rack and is used for quality control of the treatment head; the quality control device includes: The detector assembly and the drive assembly are provided, wherein the drive assembly is capable of driving the detector assembly to move along a direction perpendicular to a first direction, the first direction being the arrangement direction of the first treatment head and the second treatment head, so that the detector assembly can switch between a working position and an avoidance position. In the operating position, the detector assembly is capable of receiving beams emitted from the first treatment head and / or the second treatment head.

2. The quality control device according to claim 1, characterized in that, The detector assembly includes a first surface capable of receiving a beam emitted by either the first treatment head or the second treatment head.

3. The quality control device according to claim 2, characterized in that, The detector assembly further includes a second surface, which is opposite to the first surface along a first direction; In the working position, the first surface is capable of receiving a beam emitted by either the first treatment head or the second treatment head, and the second surface is capable of receiving a beam emitted by the other of the first treatment head and the second treatment head.

4. The quality control device according to claim 3, characterized in that, The detector assembly includes a first plate having a first surface and a second surface; Alternatively, the detector assembly includes a first plate and a second plate, the first plate having the first surface and the second plate having the second surface, the first plate and the second plate being disposed opposite to each other along the first direction, such that the first surface and the second surface are opposite to each other.

5. The quality control device according to claim 1, characterized in that, The quality control device further includes a support assembly, which comprises: A support plate is disposed on the frame, and the support plate includes a guide rail pair; A tray is slidably connected to the guide rail pair so that the tray can slide relative to the support plate, and the detector assembly is disposed on the tray.

6. The quality control device according to claim 1, characterized in that, The drive assembly includes a motor and a lead screw. The lead screw is connected to the output shaft of the motor and is driven to the detector assembly. The motor can drive the lead screw to rotate so as to switch the detector assembly between the working position and the avoidance position.

7. The quality control device according to claim 1, characterized in that, The quality control device also includes a position monitoring device, which is used to detect whether the detector assembly has moved to the working position or the avoidance position.

8. A radiotherapy system, characterized in that, The device includes a gantry and a treatment head for emitting a beam to a target area, the treatment head including a first treatment head and a second treatment head disposed opposite to each other on the gantry; and a quality control device as described in any one of claims 1-7.

9. The radiotherapy system according to claim 8, characterized in that, The treatment head is an accelerator treatment head and / or a gamma ray treatment head.

10. The radiotherapy system according to claim 9, characterized in that, The first treatment head is an accelerator treatment head, and the second treatment head is a gamma ray treatment head; Along the arrangement direction of the accelerator treatment head and the gamma ray treatment head, the quality control device is located between the radiotherapy isocenter of the accelerator treatment head and the gamma ray treatment head.

11. The radiotherapy system according to claim 8, characterized in that, It also includes an imaging device, which comprises: The X-ray source and the imaging detector are mounted on the frame respectively, and the imaging detector is used to receive the beam emitted by the X-ray source and perform imaging. At the avoidance position, the beam paths of the quality control device and the radiation source are staggered.

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