WO2022134083A1

WO2022134083A1 - Calibration apparatus for multi-leaf collimator, and annular accelerator

Info

Publication number: WO2022134083A1
Application number: PCT/CN2020/139659
Authority: WO
Inventors: 郭召
Original assignee: 西安大医集团股份有限公司
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2022-06-30

Abstract

A calibration apparatus for a multi-leaf collimator, and an annular accelerator. The calibration apparatus comprises: a support (10) disposed on a rack (33); a lifting mechanism with one end connected to the support (10); and an electron portal imaging device (11) connected to the other end of the lifting mechanism, wherein the lifting mechanism drives the electron portal imaging device (11) to move up and down, such that the electron portal imaging device (11) is located at different working positions, the working positions comprising a calibration state position and a treatment state position. When the lifting mechanism drives the electron portal imaging device (11) to be located at the calibration state position, a multi-leaf collimator can be calibrated conveniently, rapidly and accurately, and therefore the accuracy, reliability and convenience of calibrating the multi-leaf collimator are improved.

Description

多叶光栅的校准设备及环形加速器Calibration equipment for multi-leaf grating and ring accelerator

技术领域technical field

本申请实施例涉及放射治疗领域，尤其涉及一种多叶光栅的校准设备及环形加速器。The embodiments of the present application relate to the field of radiotherapy, and in particular, to a multi-leaf grating calibration device and a ring accelerator.

背景技术Background technique

环形加速器能够获得更高的精度及更高效的影像采集，是新一代医用直线加速器的重要发展方向。国内外医用直线加速器供应商在新一代产品中普遍将环形加速器作为主要研发方向。在使用环形加速器时，需要进行质保，尤其是治疗头的多叶光栅的校准，这是保证治疗安全，治疗精度的重要基础。Circular accelerators can obtain higher precision and more efficient image acquisition, which is an important development direction of a new generation of medical linear accelerators. Domestic and foreign medical linear accelerator suppliers generally take the ring accelerator as the main research and development direction in the new generation of products. When using a ring accelerator, quality assurance is required, especially the calibration of the multi-leaf grating of the treatment head, which is an important basis for ensuring treatment safety and treatment accuracy.

对于环形加速器而言，由于EPID(Electron Portal Imaging Device，电子射野影像装置)设置在环形加速器内部，远离等中心平面采集治疗头在等中心平面形成的射野形状的图像，随着光路传播，对射野形状的成像精度和成像质量下降，主要是图像虚化和半影增大，需要通过复杂的算法推导治疗头在等中心平面形成的射野形状，误差较大。而质保要求治疗头的多叶光栅的校准基准必须精确。这使得环形加速器的EPID无法用于精确校准多叶光栅。For a ring accelerator, since the EPID (Electron Portal Imaging Device) is set inside the ring accelerator, the image of the field shape formed by the treatment head on the isocenter plane is collected away from the isocenter plane. The imaging accuracy and imaging quality of the field shape are degraded, mainly due to the blurring of the image and the increase of the penumbra. It is necessary to deduce the field shape formed by the treatment head on the isocenter plane through a complex algorithm, and the error is large. The warranty requires that the calibration reference of the multi-leaf grating of the treatment head must be accurate. This makes the EPID of a ring accelerator unusable for accurate calibration of multi-leaf gratings.

在现有技术中，多采用水箱进行治疗头的多叶光栅的校准，校准精度高，但操作繁琐，对医务人员要求高，并且对环形加速器的内部空间要求高，尤其对于大射野的环形加速器，需要将更大的水箱放置到环形加速器的内部，要求环形加速器的内部空间足够大，通常直径需要达到950mm以上。In the prior art, a water tank is often used to calibrate the multi-leaf grating of the treatment head. The calibration accuracy is high, but the operation is cumbersome, requires high medical personnel, and requires high internal space of the annular accelerator, especially for the annular accelerator with a large field. For the accelerator, a larger water tank needs to be placed inside the annular accelerator, and the inner space of the annular accelerator is required to be large enough, usually the diameter needs to reach more than 950mm.

由此可见，如何既便捷又精确地对治疗头的多叶光栅进行校准成为当前亟待解决的技术问题。It can be seen that how to conveniently and accurately calibrate the multi-leaf grating of the treatment head has become an urgent technical problem to be solved.

发明内容SUMMARY OF THE INVENTION

有鉴于此，本申请实施例所解决的技术问题之一在于提供一种多叶光栅的校准设备及环形加速器，能够既便捷又精确地对治疗头的多叶光栅进行校准。In view of this, one of the technical problems solved by the embodiments of the present application is to provide a multi-leaf grating calibration device and a ring accelerator, which can conveniently and accurately calibrate the multi-leaf grating of the treatment head.

根据本申请实施例的第一方面，提供了一种多叶光栅的校准设备。所述校准设备包括：设置于机架上的支撑体；一端与所述支撑体连接的升降机构；与所述升降机构另一端连接的电子射野影像装置；所述升降机构带动所述电子射野影像装置升降，以使所述电子射野影像装置处于不同的工作位置；所述工作位置包括：校准状态位置和治疗状态位置。According to a first aspect of the embodiments of the present application, a multi-leaf grating calibration device is provided. The calibration equipment includes: a support body arranged on a rack; a lift mechanism connected to the support body at one end; an electronic portal imaging device connected to the other end of the lift mechanism; the lift mechanism drives the electron beam The field imaging device is raised and lowered, so that the electronic portal imaging device is in different working positions; the working positions include: a calibration state position and a treatment state position.

在其中一个实施例中，所述支撑体上设置有用于容纳所述升降机构的凹槽；所述升降机构设置于所述凹槽内。In one embodiment, the support body is provided with a groove for accommodating the lifting mechanism; the lifting mechanism is arranged in the groove.

在其中一个实施例中，所述升降机构包括剪叉式升降机构。In one of the embodiments, the lift mechanism comprises a scissor lift mechanism.

在其中一个实施例中，所述剪叉式升降机构包括：支撑板、剪叉组件、第一导轨以及第二导轨；所述支撑板的一面设置有所述电子射野影像装置，相对的另一面设置有所述第一导轨；所述剪叉组件的一端与所述第一导轨连接，所述剪叉组件的另一端与所述第二导轨连接；所述剪叉组件为多级剪叉组件；所述第二导轨固定于所述凹槽底部。In one embodiment, the scissor lift mechanism includes: a support plate, a scissor assembly, a first guide rail and a second guide rail; one side of the support plate is provided with the electronic portal imaging device, and the opposite side is provided with the electronic portal imaging device. One side is provided with the first guide rail; one end of the scissor assembly is connected to the first guide rail, and the other end of the scissor assembly is connected to the second guide rail; the scissor assembly is a multi-stage scissor fork assembly; the second guide rail is fixed on the bottom of the groove.

在其中一个实施例中，当所述电子射野影像装置处于所述校准状态位置时，所述剪叉组件处于伸长状态，将所述电子射野影像装置抬升至等中心平面进行多叶光栅的校准；当所述电子射野影像装置处于所述治疗状态位置时，所述剪叉组件处于压缩状态，将所述电子射野影像装置置于所述支撑体的凹槽内。In one embodiment, when the electronic portal imaging device is in the calibration state position, the scissor assembly is in an extended state, and the electronic portal imaging device is lifted to an isocenter plane for multi-leaf grating. When the electronic portal imaging device is in the treatment state position, the scissor assembly is in a compressed state, and the electronic portal imaging device is placed in the groove of the support body.

在其中一个实施例中，所述校准设备还包括：驱动机构，所述驱动机构设置于所述第二导轨上，与所述剪叉组件连接，用于驱动所述剪叉组件做上升运动或者下降运动；所述驱动机构为电机丝杆驱动。In one of the embodiments, the calibration device further includes: a driving mechanism, the driving mechanism is disposed on the second guide rail and connected to the scissors assembly, for driving the scissors assembly to move upward or descending movement; the drive mechanism is driven by a motor screw.

在其中一个实施例中，所述凹槽的内壁周向形成有凸台，所述电子射野影像装置处于治疗状态位置时，所述支撑板与所述凸台抵靠。In one embodiment, a boss is formed on the inner wall of the groove in the circumferential direction, and when the electron portal imaging device is in a treatment state position, the support plate abuts against the boss.

在其中一个实施例中，所述凸台与所述支撑板的接触面上设置有至少一个定位销，所述支撑板设置有与至少一个所述定位销对应的定位孔，所述电子射野影像装置处于治疗状态位置时，所述定位销***对应的所述定位孔，所述支撑板与所述凸台抵靠。In one embodiment, at least one positioning pin is provided on the contact surface of the boss and the support plate, the support plate is provided with a positioning hole corresponding to the at least one positioning pin, and the electron beam field When the imaging device is in the treatment state position, the positioning pin is inserted into the corresponding positioning hole, and the support plate abuts against the boss.

在其中一个实施例中，所述凹槽底面与所述支撑板之间设置有升降导向机构。In one embodiment, a lift guide mechanism is provided between the bottom surface of the groove and the support plate.

在其中一个实施例中，所述校准设备还包括：位置检测装置，所述位置检测装置的主体设置于所述支撑体内，且所述位置检测装置的检测端与所述电子射野影像装置连接，所述位置检测装置用于检测所述电子射野影像装置的位置。In one embodiment, the calibration apparatus further includes: a position detection device, a main body of the position detection device is disposed in the support body, and a detection end of the position detection device is connected to the electronic portal imaging device , the position detection device is used for detecting the position of the electronic portal imaging device.

在其中一个实施例中，所述电子射野影像装置的连接线置于拖链内。In one embodiment, the connecting wire of the electronic portal imaging device is placed in a drag chain.

在其中一个实施例中，所述支撑体背面凹槽位置对应处设置有辅助屏蔽板。In one embodiment, an auxiliary shielding plate is provided at a position corresponding to the groove on the back of the support body.

根据本申请实施例的第二方面，提供了一种环形加速器，所述环形加速器包括：本申请实施例的第一方面所述的多叶光栅的校准设备、治疗头以及机架；所述校准设备以及所述治疗头设置于所述机架内；所述校准设备与所述治疗头相对。According to a second aspect of the embodiments of the present application, a ring accelerator is provided, and the ring accelerator includes: the multi-leaf grating calibration device, the treatment head, and the gantry according to the first aspect of the embodiments of the present application; the calibration The device and the treatment head are arranged in the frame; the calibration device is opposite to the treatment head.

本申请实施例提供的多叶光栅的校准设备包括设置于机架上的支撑体；一端与所述支撑体连接的升降机构；与所述升降机构另一端连接的电子射野影像装置；所述升降机构带动所述电子射野影像装置升降，以使所述电子射野影像装置处于不同的工作位置；所述工作位置包括：校准状态位置和治疗状态位置，与现有的其它方式相比，当所述升降机构带动所述电子射野影像装置处于校准状态位置时，所述电子射野影像装置采集治疗头在等中心平面形成的射野形状的图像，该图像能够客观准确地表征治疗头在等中心平面形成的射野形状，可以真实反映治疗头在等中心平面形成的射野形状的质量和精度，为治疗头的多叶光栅的校准提供准确真实的数据，能够既便捷又精确地对治疗头的多叶光栅进行校准，从而提高多叶光栅校准的精确性、可靠性和便捷性。The multi-leaf grating calibration device provided by the embodiment of the present application includes a support body disposed on a frame; a lifting mechanism connected with one end of the support body; an electronic portal imaging device connected with the other end of the lifting mechanism; The lifting mechanism drives the electronic portal imaging device to ascend and descend, so that the electronic portal imaging device is in different working positions; the working positions include: a calibration state position and a treatment state position. Compared with other existing methods, the When the elevating mechanism drives the electronic portal imaging device to be in a calibrated position, the electronic portal imaging device captures an image of the shape of the portal formed by the treatment head on the isocenter plane, and the image can objectively and accurately characterize the treatment head The shape of the field formed on the isocenter plane can truly reflect the quality and accuracy of the shape of the field formed by the treatment head on the isocenter plane, and provide accurate and real data for the calibration of the multi-leaf grating of the treatment head, which can be convenient and accurate. The multi-leaf grating of the treatment head is calibrated, thereby improving the accuracy, reliability and convenience of the multi-leaf grating calibration.

附图说明Description of drawings

后文将参照附图以示例性而非限制性的方式详细描述本申请实施例的一些具体实施例。附图中相同的附图标记标示了相同或类似的部件或部分。本领域技术人员应该理解，这些附图未必是按比例绘制的。附图中：Hereinafter, some specific embodiments of the embodiments of the present application will be described in detail by way of example and not limitation with reference to the accompanying drawings. The same reference numbers in the figures designate the same or similar parts or parts. It will be understood by those skilled in the art that the drawings are not necessarily to scale. In the attached picture:

图1示出了本申请实施例的多叶光栅的校准设备处于质保模式的立体结构的第一示意图；FIG. 1 shows a first schematic diagram of the three-dimensional structure of the multi-leaf grating calibration device in the quality assurance mode according to the embodiment of the present application;

图2示出了本申请实施例的多叶光栅的校准设备处于质保模式的第一视角的示意图；FIG. 2 shows a schematic diagram of a first viewing angle of the multi-leaf grating calibration device in the quality assurance mode according to the embodiment of the present application;

图3示出了本申请实施例的多叶光栅的校准设备处于质保模式的第二视角的示意图；FIG. 3 is a schematic diagram showing a second viewing angle of the multi-leaf grating calibration device in the quality assurance mode according to the embodiment of the present application;

图4示出了本申请实施例的多叶光栅的校准设备处于质保模式的第二视角的剖视图；FIG. 4 shows a cross-sectional view of the calibration device of the multi-leaf grating according to the embodiment of the present application from a second viewing angle in a quality assurance mode;

图5示出了本申请实施例的多叶光栅的校准设备处于工作模式的第二视角的剖视图；FIG. 5 shows a cross-sectional view of the calibration device of the multi-leaf grating according to the embodiment of the present application in the second viewing angle in the working mode;

图6示出了本申请实施例的多叶光栅的校准设备中的支撑板的定位的示意图；FIG. 6 is a schematic diagram showing the positioning of the support plate in the calibration device of the multi-leaf grating according to the embodiment of the present application;

图7示出了本申请实施例的多叶光栅的校准设备处于工作模式的立体结构示意图；FIG. 7 shows a schematic three-dimensional structure diagram of the multi-leaf grating calibration device in the working mode according to the embodiment of the present application;

图8示出了本申请实施例的多叶光栅的校准设备处于质保模式的立体结构的第二示意图；Fig. 8 shows the second schematic diagram of the three-dimensional structure of the calibration device of the multi-leaf grating according to the embodiment of the present application in the quality assurance mode;

图9示出了本申请实施例的多叶光栅的校准设备的应用场景的第一示意图；FIG. 9 shows a first schematic diagram of an application scenario of a calibration device for a multi-leaf grating according to an embodiment of the present application;

图10示出了本申请实施例的多叶光栅的校准设备的应用场景的第二示意图。FIG. 10 shows a second schematic diagram of an application scenario of the multi-leaf grating calibration device according to the embodiment of the present application.

附图标记说明Description of reference numerals

10、支撑体；11、电子射野影像装置；12、电子射野影像装置的成像区域；13、支撑板；14、凸台；15、凹槽；16、辅助屏蔽板；17、接触面；18、定位销；19、第一连杆；20、第二连杆；21、第三连杆；22、第四连杆；23、定位孔；24、驱动电机；25、第一固定铰链；26、第一活动铰链；27、第一导轨；28、第二固定铰链；29、第二活动铰链；30、丝杆；31、第二导轨；32、天线式升降柱；33、机架；34、治疗头。10. Support body; 11. Electronic portal imaging device; 12. Imaging area of electronic portal imaging device; 13. Support plate; 14. Boss; 15. Groove; 16. Auxiliary shielding plate; 17. Contact surface; 18, locating pin; 19, first link; 20, second link; 21, third link; 22, fourth link; 23, positioning hole; 24, drive motor; 25, first fixed hinge; 26, the first living hinge; 27, the first guide rail; 28, the second fixed hinge; 29, the second living hinge; 30, the screw rod; 31, the second guide rail; 32, the antenna type lifting column; 34. Treatment head.

具体实施方式Detailed ways

实施本申请实施例的任一技术方案必不一定需要同时达到以上的所有优点。为了使本领域的人员更好地理解本申请实施例中的技术方案，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本申请实施例一部分实施例，而不是全部的实施例。基于本申请实施例中的实施例，本领域普通技术人员所获得的所有其他实施例，都应当属于本申请实施例保护的范围。Implementing any technical solution of the embodiments of the present application does not necessarily need to achieve all the above advantages at the same time. In order to make those skilled in the art better understand the technical solutions in the embodiments of the present application, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. The embodiments described above are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the embodiments of the present application should fall within the protection scope of the embodiments of the present application.

下面结合本申请实施例附图进一步说明本申请实施例具体实现。The specific implementation of the embodiments of the present application is further described below with reference to the accompanying drawings of the embodiments of the present application.

本申请实施例涉及的加速器可包括机架、治疗床、设置于机架上的治疗头，以及与治疗头通信连接的调制器和控制***。治疗头在调制器和控制***的控制下实现电子束转换为X射线，对肿瘤病灶区域进行照射以便杀死肿瘤病灶区域的肿瘤细胞。其中，机架可以为滚筒式机架。治疗头包括X射线产生装置以及准直器。准直器可以是多叶光栅，多叶光栅用于产生满足要求的射野，射野指的是X射线照射的面积和形状，定义了射线照射的一个范围。X射线产生装置可以包括发射电子束的电子枪，为电子束加速的加速管，为加速管提供建立加速场所需的射频功率的微波***，对电子束进行X线转换和均整输出的辐射***等。X射线产生装置发出的X射线经过多叶光栅产生的射野照射至肿瘤病灶区。此外，加速器还包括设置于机架上的电子射野影像装置，电子射野影像装置通常布置在治疗头正对面，也即是电子射野影像装置所在的平面与治疗头发出的射线束的轴线垂直。电子射野影像装置包括平板电路以及与平板电路通信连接的平板有效探测单元，电子射野影像装置用于对治疗头进行剂量验证和射野验证。例如，在采用加速器对患者进行治疗之前，需要制定治疗计划，该治疗计划中包括至少一个照射野以及与每个照射野对应的辐射剂量。在治疗计划制定完成后，控制治疗头发出的辐射束直接照射到电子射野影像装置上，通过电子射野影像装置可以检测出该辐射束形成的照射野与治疗计划中对应的照射野的形状是否一致，也即射野验证，并作出响应。在采用加速器对患者进行治疗的过程中，控制治疗头发出的辐射束从患者的靶区穿过后投射到电子射野影像装置上，通过电子射野影像装置可以检测出辐射束的辐射剂量与治疗计划中的对应的辐射剂量是否一致，也即剂量验证，并作出响应。The accelerator involved in the embodiments of the present application may include a gantry, a treatment couch, a treatment head disposed on the gantry, and a modulator and a control system connected in communication with the treatment head. The treatment head realizes the conversion of electron beams into X-rays under the control of the modulator and the control system, and irradiates the tumor lesion area to kill tumor cells in the tumor lesion area. Wherein, the rack may be a drum-type rack. The treatment head includes an X-ray generating device and a collimator. The collimator can be a multi-leaf grating, and the multi-leaf grating is used to generate a field that meets the requirements. The field refers to the area and shape of the X-ray irradiation, which defines a range of the ray irradiation. The X-ray generating device may include an electron gun that emits electron beams, an accelerator tube that accelerates the electron beam, a microwave system that provides the accelerator tube with radio frequency power required to establish an acceleration field, and a radiation system that converts the electron beams to X-rays and equalizes the output, etc. . The X-ray emitted by the X-ray generating device is irradiated to the tumor lesion area through the field generated by the multi-leaf grating. In addition, the accelerator also includes an electronic portal imaging device arranged on the gantry. The electronic portal imaging device is usually arranged directly opposite the treatment head, that is, the plane where the electronic portal imaging device is located and the axis of the beam emitted by the treatment head vertical. The electronic portal imaging device includes a flat panel circuit and a flat panel effective detection unit communicatively connected with the flat panel circuit, and the electronic portal imaging device is used to perform dose verification and portal verification on the treatment head. For example, before using an accelerator to treat a patient, a treatment plan needs to be developed, and the treatment plan includes at least one irradiation field and a radiation dose corresponding to each irradiation field. After the treatment plan is formulated, the radiation beam emitted by the controlled treatment head is directly irradiated on the electronic portal imaging device, and the electronic portal imaging device can detect the radiation field formed by the radiation beam and the shape of the corresponding radiation field in the treatment plan. Whether it is consistent, that is, the field verification, and respond. In the process of using the accelerator to treat the patient, the radiation beam emitted by the control treatment head passes through the target area of the patient and then is projected onto the electronic portal imaging device. The electronic portal imaging device can detect the radiation dose and treatment of the radiation beam. Whether the corresponding radiation dose in the plan is consistent, that is, dose verification, and respond.

治疗头发出的放射线经过多叶光栅的适形形成肿瘤的形状并照射在肿瘤区域，以将肿瘤细胞杀死，同时避免照射肿瘤周围的重要组织和器官，因此，多叶光栅的适形校准非常重要。而环形加速器采用等中心治疗，电子射野影像装置远离环形加速器的等中心平面布置。电子射野影像装置在远离等中心平面形成的图像相对于电子射野影像装置在等中心平面所形成的图像，图像品质下降，主要是图像虚化和半影增大。因此，电子射野影像装置在远离等中心平面的位置采集的图像不能用来精确校准环形加速器的治疗头的多叶光栅。为了能够精确校准多叶光栅，需要电子射野影像装置在等中心平面采集图像，该图像能够客观准确地表征治疗头在等中心平面形成的射野形状，可以真实反映治疗头在等中心平面形成的射野形状的质量和精度，为多叶光栅的校准提供准确真实的数据。The radiation emitted by the treatment head is conformed by the multi-leaf grating to form the shape of the tumor and irradiate on the tumor area to kill the tumor cells while avoiding irradiating important tissues and organs around the tumor. Therefore, the conformal calibration of the multi-leaf grating is very important. important. While the ring accelerator adopts isocenter treatment, the electron portal imaging device is arranged far from the isocenter plane of the ring accelerator. Compared with the image formed by the electronic portal imaging device on the isocenter plane, the image quality of the image formed by the electronic portal imaging device is degraded, mainly due to the blurring of the image and the increase of the penumbra. Therefore, images acquired by the electron portal imaging device at locations far from the isocenter plane cannot be used to accurately calibrate the multi-leaf grating of the treatment head of the ring accelerator. In order to accurately calibrate the multi-leaf grating, an electronic portal imaging device is required to collect images on the isocenter plane. The image can objectively and accurately represent the shape of the portal formed by the treatment head on the isocenter plane, and can truly reflect the formation of the treatment head on the isocenter plane. The quality and precision of the field shape provide accurate and real data for the calibration of the multi-leaf grating.

基于此，本申请实施例特提供一种多叶光栅的校准设备，校准设备中的升降机构带动电子射野影像装置上升，使得电子射野影像装置处于校准状态位置，也即是电子射野影像装置处于环形加速器的等中心平面，电子射野影像装置便可以在等中心平面采集治疗头的射野形状的图像。Based on this, an embodiment of the present application provides a calibration device for a multi-leaf grating. The elevating mechanism in the calibration device drives the electronic portal imaging device to rise, so that the electronic portal imaging device is in a calibrated position, that is, the electronic portal image. The device is located on the isocenter plane of the annular accelerator, and the electron portal imaging device can collect images of the shape of the portal of the treatment head on the isocenter plane.

下面结合本申请实施例的附图详细说明本申请实施例提供的多叶光栅的校准设备的具体实现。The specific implementation of the multi-leaf grating calibration device provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings of the embodiments of the present application.

参照图1，示出了本申请实施例的多叶光栅的校准设备处于质保模式的立体结构的第一示意图。多叶光栅的校准设备包括：设置于机架33上的支撑体10；一端与支撑体10连接的升降机构；与升降机构另一端连接的电子射野影像装置11；升降机构带动电子射野影像装置11升降，以使电子射野影像装置11处于不同的工作位置；工作位置包括：校准状态位置和治疗状态位置。籍此，当升降机构带动电子射野影像装置处于校准状态位置时，电子射野影像装置采集治疗头在等中心平面形成的射野形状的图像，该图像能够客观准确地表征治疗头在等中心平面形成的射野形状，可以真实反映治疗头在等中心平面形成的射野形状的质量和精度，为治疗头的多叶光栅的校准提供准确真实的数据，能够既便捷又精确地对治疗头的多叶光栅进行校准，从而提高多叶光栅校准的精确性、可靠性和便捷性。Referring to FIG. 1 , a first schematic diagram of the three-dimensional structure of the multi-leaf grating calibration device according to the embodiment of the present application is shown in a quality assurance mode. The multi-leaf grating calibration equipment includes: a support body 10 arranged on the frame 33; a lifting mechanism connected with the support body 10 at one end; an electronic portal imaging device 11 connected with the other end of the lifting mechanism; the lifting mechanism drives the electronic portal image The device 11 is lifted up and down, so that the electronic portal imaging device 11 is in different working positions; the working positions include: a calibration state position and a treatment state position. In this way, when the lifting mechanism drives the electronic portal imaging device to be in a calibrated position, the electronic portal imaging device collects an image of the shape of the portal formed by the treatment head on the isocenter plane, and the image can objectively and accurately represent the treatment head in the isocenter. The shape of the radiation field formed by the plane can truly reflect the quality and accuracy of the shape of the radiation field formed by the treatment head on the isocenter plane, provide accurate and real data for the calibration of the multi-leaf grating of the treatment head, and can easily and accurately adjust the treatment head. The multi-leaf grating is calibrated, thereby improving the accuracy, reliability and convenience of multi-leaf grating calibration.

在本申请实施例中，机架33可为环形机架、滚筒式机架、C形臂机架、悬臂式机架、半弧形机架或者机械臂机架等。在本实施例中，以环形机架为例进行说明。电子射野影像装置11的成像区域12所在的平面与治疗头34发出的射线束的轴线垂直，也即电子射野影像装置11的成像区域12正对治疗头34发出的射线束。电子射野影像装置11处于射线高辐射区域。初次安装电子射野影像装置11时，环形机架至于零度，用水平仪或倾角仪校验电子射野影像装置11升至校准状态位置(等中心平面处)的水平度，调整到误差允许范围后进行固定。在机械结构稳定的情况下，这一水平度不会走失。为了避免治疗头34发出的射线向外部环境泄露给环境造成危害，支撑体10可包括用于屏蔽治疗头34发出射线的屏蔽支撑体。屏蔽支撑体的外壳为钢制外壳，并且钢制外壳内部灌注有铅材料，以阻挡治疗头34发出的射线。升降机构的升降方式包括以下中的至少一者：剪叉式升降、套筒伸缩升降、抽拉式升降、液压升降、气动升降、手摇升降等。质保模式可理解为多叶光栅的校准设备对治疗头的多叶光栅进行校准的模式。当多叶光栅的校准设备处于质保模式时，电子射野影像装置11可处于校准状态位置对治疗头的多叶光栅进行校准。工作模式可理解为多叶光栅的校准设备对治疗头进行剂量验证和射野验证的模式。当多叶光栅的校准设备处于工作模式时，电子射野影像装置11可处于治疗状态位置对治疗头进行剂量验证和射野验证。In the embodiment of the present application, the rack 33 may be a ring rack, a drum rack, a C-arm rack, a cantilever rack, a semi-arc rack, or a robotic arm rack, or the like. In this embodiment, a ring rack is taken as an example for description. The plane where the imaging area 12 of the electronic portal imaging device 11 is located is perpendicular to the axis of the radiation beam emitted by the treatment head 34 , that is, the imaging area 12 of the electronic portal imaging device 11 is facing the radiation beam emitted by the treatment head 34 . The electron portal imaging device 11 is located in a high radiation area. When the electronic portal imaging device 11 is installed for the first time, the ring frame is at zero degrees, and the level of the electronic portal imaging device 11 raised to the calibrated position (at the isocenter plane) is checked with a spirit level or inclinometer. After adjusting to the allowable error range to be fixed. In the case of a stable mechanical structure, this level will not be lost. In order to prevent the radiation emitted by the treatment head 34 from leaking to the external environment and causing harm to the environment, the support body 10 may include a shielding support body for shielding the radiation emitted by the treatment head 34 . The shell of the shielding support body is a steel shell, and the steel shell is filled with lead material to block the radiation emitted by the treatment head 34 . The lifting method of the lifting mechanism includes at least one of the following: scissor lift, telescopic lift of sleeve, pull-out lift, hydraulic lift, pneumatic lift, manual lift, and the like. The warranty mode can be understood as the mode in which the multi-leaf grating calibration equipment of the treatment head calibrates the multi-leaf grating. When the calibration equipment of the multi-leaf grating is in the warranty mode, the electronic portal imaging device 11 can be in the calibration state position to calibrate the multi-leaf grating of the treatment head. The working mode can be understood as the mode in which the calibration equipment of the multi-leaf grating performs dose verification and field verification on the treatment head. When the calibration device of the multi-leaf grating is in the working mode, the electronic portal imaging device 11 can be in the treatment state position to perform dose verification and portal verification on the treatment head.

在一些可选实施例中，支撑体10上设置有用于容纳升降机构的凹槽15；升降机构设置于凹槽15内。在具体的实施方式中，可在支撑体10的中部设置向下凹陷的凹槽15，凹槽15的形状可为正方形、长方形、圆形、椭圆形等。籍此，通过支撑体上设置的凹槽，能够容纳升降机构。In some optional embodiments, the support body 10 is provided with a groove 15 for accommodating the lifting mechanism; the lifting mechanism is arranged in the groove 15 . In a specific embodiment, a downwardly concave groove 15 can be provided in the middle of the support body 10 , and the shape of the groove 15 can be square, rectangular, circular, oval, or the like. Thereby, the lifting mechanism can be accommodated through the groove provided on the support body.

在一些可选实施例中，升降机构包括剪叉式升降机构。所述剪叉式升降机构可理解为通过交叉连接的连杆的伸缩来实现升降的机构。籍此，通过剪叉式升降机构，对电子射野影像装置进行升降，能够实现电子射野影像装置升降至等中心平面。In some alternative embodiments, the lift mechanism comprises a scissor lift mechanism. The scissor lift mechanism can be understood as a mechanism that achieves lift through the expansion and contraction of cross-connected links. In this way, the electronic portal imaging device can be raised and lowered through the scissor lift mechanism, so that the electronic portal imaging device can be raised and lowered to the isocenter plane.

在一些可选实施例中，剪叉式升降机构包括：支撑板13、剪叉组件、第一导轨27以及第二导轨31；支撑板13的一面设置有电子射野影像装置11，相对的另一面设置有第一导轨27；剪叉组件的一端与第一导轨27连接，剪叉组件的另一端与第二导轨31连接；剪叉组件为多级剪叉组件；第二导轨31固定于凹槽15底部。In some optional embodiments, the scissor lift mechanism includes: a support plate 13, a scissor assembly, a first guide rail 27 and a second guide rail 31; one side of the support plate 13 is provided with the electronic portal imaging device 11, and the opposite side is provided with the electronic portal imaging device 11. One side is provided with a first guide rail 27; one end of the scissor fork assembly is connected to the first guide rail 27, and the other end of the scissor fork assembly is connected to the second guide rail 31; the scissor fork assembly is a multi-stage scissor fork assembly; Bottom of slot 15.

在一个具体的例子中，电子射野影像装置11固定于支撑板13的上表面。第一导轨27设置于支撑板13的下表面。支撑板13由钨合金制成，能够有效对治疗头发出的射线进行补充屏蔽，进一步避免治疗头发出的射线向外部环境泄露给环境造成危害。凹槽15底部可为在支撑体10的中部设置的向下凹陷的凹槽15的底面。In a specific example, the electron portal imaging device 11 is fixed on the upper surface of the support plate 13 . The first guide rail 27 is provided on the lower surface of the support plate 13 . The support plate 13 is made of tungsten alloy, which can effectively supplement and shield the radiation emitted by the treatment head, and further prevent the radiation emitted by the treatment head from leaking to the external environment and causing harm to the environment. The bottom of the groove 15 can be the bottom surface of the groove 15 which is recessed downward and is provided in the middle of the support body 10 .

在一个具体的例子中，多级剪叉组件可为二级剪叉组件。二级剪叉组件包括交叉连接的第一连杆19和第二连杆20，及交叉连接的第三连杆21和第四连杆22；第一连杆19的第一端通过第一固定铰链25与第一导轨27转动连接，第二连杆20的第一端通过第一活动铰链26与第一导轨27转动连接；第一连杆19和第二连杆20的第二端分别与第三连杆21和第四连杆22的第一端转动连接；第四连杆22的第二端通过第二固定铰链28与第二导轨31转动连接，第三连杆21的第二端通过第二活动铰链29与第二导轨31转动连接。其中，第一固定铰链25可理解为不能相对于第一导轨27移动的铰链，第一活动铰链26可理解为相对于第一导轨27移动的铰链，第二固定铰链28可理解为不能相对于第二导轨31移动的铰链，第二活动铰链29可理解为相对于第二导轨31移动的铰链。在本实施例中，仅以二级剪叉组件包括交叉连接的第一连杆19和第二连杆20，及交叉连接的第三连杆21和第四连杆22等四个连杆为例，对多级剪叉组件进行详细说明。当然，本实施例不限于此，多级剪叉组件可为三级剪叉组件、四级剪叉组件等。In a specific example, the multi-stage scissor assembly may be a two-stage scissor assembly. The secondary scissor assembly includes a cross-connected first link 19 and a second link 20, and a cross-connected third link 21 and a fourth link 22; the first end of the first link 19 is fixed by the first link The hinge 25 is rotatably connected with the first guide rail 27, and the first end of the second link 20 is rotatably connected with the first guide rail 27 through the first living hinge 26; the second ends of the first link 19 and the second link 20 are respectively connected with The first ends of the third link 21 and the fourth link 22 are rotatably connected; the second end of the fourth link 22 is rotatably connected to the second guide rail 31 through the second fixed hinge 28 , and the second end of the third link 21 It is rotatably connected with the second guide rail 31 through the second living hinge 29 . The first fixed hinge 25 can be understood as a hinge that cannot move relative to the first guide rail 27 , the first living hinge 26 can be understood as a hinge that moves relative to the first guide rail 27 , and the second fixed hinge 28 can be understood as a hinge that cannot move relative to the first guide rail 27 . The hinge for moving the second guide rail 31 , the second living hinge 29 can be understood as a hinge moving relative to the second guide rail 31 . In this embodiment, only four links including the cross-connected first link 19 and the second link 20, and the cross-connected third link 21 and the fourth link 22 are used as the two-stage scissor assembly. For example, the multi-stage scissor assembly will be described in detail. Of course, this embodiment is not limited thereto, and the multi-stage scissor assembly may be a three-stage scissor assembly, a four-stage scissor assembly, or the like.

在一个具体的例子中，当多级剪叉组件带动电子射野影像装置11上升时，第二连杆20的第一端连接的第一活动铰链26在第一导轨27上沿着第一水平方向运动，并且第三连杆21的第二端连接的第二活动铰链29在第二导轨31上沿着第一水平方向运动。其中，第一水平方向可理解为使得多级剪叉组件上升的水平运动方向，第一水平方向可为水平向左。当多级剪叉组件带动电子射野影像装置11下降时，第二连杆20的第一端连接的第一活动铰链26在第一导轨27上沿着第二水平方向运动，并且第三连杆21的第二端连接的第二活动铰链29在第二导轨31上沿着第二水平方向运动。其中，第二水平方向可理解为使得多级剪叉组件下降的水平运动方向，第二水平方向可为水平向右，第一导轨27和第二导轨31均为导轨副。In a specific example, when the multi-stage scissor assembly drives the electronic portal imaging device 11 to rise, the first living hinge 26 connected to the first end of the second link 20 is on the first guide rail 27 along the first level. The second living hinge 29 connected with the second end of the third link 21 moves along the first horizontal direction on the second guide rail 31 . Wherein, the first horizontal direction can be understood as the horizontal movement direction that makes the multi-stage scissors assembly rise, and the first horizontal direction can be horizontal to the left. When the multi-stage scissor assembly drives the electronic portal imaging device 11 to descend, the first living hinge 26 connected to the first end of the second link 20 moves along the second horizontal direction on the first guide rail 27, and the third link 20 moves along the second horizontal direction. The second living hinge 29 to which the second end of the rod 21 is connected moves along the second horizontal direction on the second guide rail 31 . Wherein, the second horizontal direction can be understood as a horizontal movement direction that makes the multi-stage scissor assembly descend, the second horizontal direction can be horizontal to the right, and both the first guide rail 27 and the second guide rail 31 are guide rail pairs.

在一些可选实施例中，校准设备还包括：驱动机构，驱动机构设置于第二导轨31上，与剪叉组件连接，用于驱动剪叉组件做上升运动或者下降运动；驱动机构为电机丝杆驱动。其中，驱动机构包括：丝杆30，与第二活动铰链29转动连接；驱动电机24，与丝杆30转动连接。籍此，通过设置于第二导轨上的驱动机构，能够有效地驱动剪叉组件做上升运动或者下降运动。In some optional embodiments, the calibration device further includes: a driving mechanism, the driving mechanism is disposed on the second guide rail 31, connected to the scissors assembly, and used to drive the scissors assembly to perform ascending or descending motion; the driving mechanism is a motor wire rod drive. The driving mechanism includes: a screw rod 30 , which is rotatably connected with the second living hinge 29 ; and a driving motor 24 , which is rotatably connected with the screw rod 30 . Thereby, the scissors assembly can be effectively driven to ascend or descend through the drive mechanism disposed on the second guide rail.

在一些可选实施例中，当电子射野影像装置11处于校准状态位置时，剪叉组件处于伸长状态，将电子射野影像装置11抬升至等中心平面进行多叶光栅的校准；当电子射野影像装置11处于治疗状态位置时，剪叉组件处于压缩状态，将电子射野影像装置11置于支撑体10的凹槽15内。具体地，当电子射野影像装置11处于校准状态位置时，支撑板13所在的平面为等中心平面，电子射野影像装置11采集治疗头34在等中心平面形成的射野形状的图像，以用于校准多叶光栅。更具体地，在电子射野影像装置11采集治疗头34在等中心平面形成的射野形状的图像之后，对图像进行识别，以获得治疗头34在等中心平面形成的射野形状的实际尺寸，并将实际尺寸与治疗头34在等中心平面形成的射野形状的期望尺寸进行比对，以获得实际尺寸与期望尺寸的偏差数据，最后根据实际尺寸与期望尺寸的偏差数据，对治疗头34的多叶光栅进行校准。具体地，当电子射野影像装置11处于治疗状态位置时，剪叉组件将电子射野影像装置11置于支撑体10的凹槽15内，电子射野影像装置11随机架33旋转，并对治疗头34进行射野验证和剂量验证。In some optional embodiments, when the electronic portal imaging device 11 is in the calibration state position, the scissor assembly is in an extended state, and the electronic portal imaging device 11 is lifted to the isocenter plane to calibrate the multi-leaf grating; When the portal imaging device 11 is in the treatment state position, the scissor assembly is in a compressed state, and the electronic portal imaging device 11 is placed in the groove 15 of the support body 10 . Specifically, when the electronic portal imaging device 11 is in the calibration state position, the plane where the support plate 13 is located is the isocenter plane, and the electronic portal imaging device 11 collects the image of the portal shape formed by the treatment head 34 on the isocenter plane, so as to Used to calibrate multileaf gratings. More specifically, after the electronic portal imaging device 11 captures an image of the shape of the portal formed by the treatment head 34 on the isocenter plane, the image is identified to obtain the actual size of the shape of the portal formed by the treatment head 34 on the isocenter plane. , and compare the actual size with the expected size of the field shape formed by the treatment head 34 on the isocenter plane to obtain the deviation data between the actual size and the expected size. Finally, according to the deviation data between the actual size and the expected size, the treatment head is 34 multi-leaf gratings for calibration. Specifically, when the electronic portal imaging device 11 is in the treatment state position, the scissor assembly places the electronic portal imaging device 11 in the groove 15 of the support body 10 , and the electronic portal imaging device 11 rotates with the frame 33 . The treatment head 34 performs field verification and dose verification.

在一个具体的例子中，若校准设备处于质保模式，驱动机构接收到多叶光栅的校准信号，驱动机构驱动剪叉组件做上升运动，剪叉组件带动电子射野影像装置11上升至环形加速器的等中心平面，电子射野影像装置11采集治疗头34在等中心平面形成的射野形状的图像，以用于校准多叶光栅。具体地，若校准设备处于质保模式，驱动电机24接收到多叶光栅的校准信号，驱动电机24驱动丝杆30沿着第一方向旋转，带动第二活动铰链29沿着第一水平方向运动，以使剪叉组件做上升运动，剪叉组件带动固定于支撑板13上的电子射野影像装置11上升至等中心平面，电子射野影像装置11采集治疗头34在等中心平面形成的射野形状的图像，以用于校准多叶光栅。籍此，电子射野影像装置采集治疗头在等中心平面形成的射野形状的图像，该图像能够客观准确地表征治疗头在等中心平面形成的射野形状，可以真实反映环治疗头在等中心平面形成的射野形状的质量和精度，为多叶光栅的校准提供准确真实的数据，能够既便捷又精确地对多叶光栅进行校准，从而提高多叶光栅校准的精确性、可靠性和便捷性。In a specific example, if the calibration equipment is in the quality assurance mode, the drive mechanism receives the calibration signal of the multi-leaf grating, the drive mechanism drives the scissors assembly to move upward, and the scissors assembly drives the electronic portal imaging device 11 to ascend to the circular accelerator. In the isocenter plane, the electronic portal imaging device 11 acquires an image of the shape of the portal formed by the treatment head 34 on the isocenter plane, so as to be used for calibrating the multi-leaf grating. Specifically, if the calibration device is in the quality assurance mode, the drive motor 24 receives the calibration signal of the multi-leaf grating, and the drive motor 24 drives the lead screw 30 to rotate along the first direction, and drives the second living hinge 29 to move along the first horizontal direction, In order to make the scissors assembly move upward, the scissors assembly drives the electronic portal imaging device 11 fixed on the support plate 13 to rise to the isocenter plane, and the electronic portal imaging device 11 collects the radiation field formed by the treatment head 34 on the isocenter plane. Shaped image for use in calibrating multileaf gratings. In this way, the electronic portal imaging device collects the image of the shape of the field formed by the treatment head on the isocenter plane, which can objectively and accurately represent the shape of the field formed by the treatment head on the isocenter plane, and can truly reflect the shape of the field formed by the ring treatment head. The quality and precision of the field shape formed by the center plane provide accurate and real data for the calibration of the multi-leaf grating, which can easily and accurately calibrate the multi-leaf grating, thereby improving the accuracy, reliability and reliability of the multi-leaf grating calibration. Convenience.

在一个具体的例子中，在完成多叶光栅的校准之后，驱动机构驱动剪叉组件做下降运动，剪叉组件带动电子射野影像装置11从等中心平面下降至支撑体10的凹槽15内。具体地，在完成多叶光栅的校准之后，驱动电机24驱动丝杆30沿着第二方向旋转，带动第二活动铰链29沿着第二水平方向运动，以驱动剪叉组件做下降运动，剪叉组件带动固定于支撑板13的上的电子射野影像装置11从等中心平面下降至支撑体10的凹槽15内。籍此，在电子射野影像装置从等中心平面下降至支撑体的凹槽内时，能够在不影响环形加速器的治疗空间的情况下，对治疗头进行射野验证和剂量验证。In a specific example, after the calibration of the multi-leaf grating is completed, the driving mechanism drives the scissors assembly to perform a descending motion, and the scissors assembly drives the electronic portal imaging device 11 to descend from the isocenter plane to the groove 15 of the support body 10 . Specifically, after the calibration of the multi-leaf grating is completed, the drive motor 24 drives the screw rod 30 to rotate along the second direction, and drives the second living hinge 29 to move along the second horizontal direction, so as to drive the scissor assembly to perform a downward movement, and the scissors The fork assembly drives the electron portal imaging device 11 fixed on the support plate 13 to descend from the isocenter plane to the groove 15 of the support body 10 . In this way, when the electron portal imaging device descends from the isocenter plane into the groove of the support body, the treatment head can be subjected to field verification and dose verification without affecting the treatment space of the annular accelerator.

在一个具体的例子中，环形加速器的工业造型上设置有触摸显示屏或按钮，通过点击触摸显示屏或按钮进行多叶光栅的校准。用户可通过点击触摸显示屏的校准控件，或者按压校准按键或者校准按钮，驱动电机24可接收到多叶光栅的校准信号。具体地，当向驱动电机24发送多叶光栅的校准信号时，电子射野影像装置11从支撑体10的凹槽15内上升至等中心平面，并采集治疗头34在等中心平面形成的射野形状的图像，以用于校准治疗头34的多叶光栅。在完成多叶光栅的校准之后，电子射野影像装置11从等中心平面下降至支撑体10的凹槽15内，并对治疗头34进行射野验证和剂量验证。In a specific example, the industrial shape of the ring accelerator is provided with a touch screen or button, and the multi-leaf grating is calibrated by clicking the touch screen or button. The user can click the calibration control on the touch screen, or press the calibration button or the calibration button, and the drive motor 24 can receive the calibration signal of the multi-leaf grating. Specifically, when the calibration signal of the multi-leaf grating is sent to the drive motor 24, the electronic portal imaging device 11 rises from the groove 15 of the support body 10 to the isocenter plane, and collects the radiation formed by the treatment head 34 on the isocenter plane. Field-shaped images for use in calibrating the multi-leaf raster of the treatment head 34. After the calibration of the multi-leaf grating is completed, the electronic portal imaging device 11 descends from the isocenter plane into the groove 15 of the support body 10 , and performs portal verification and dose verification on the treatment head 34 .

在一个具体的例子中，如图2、图3、图4及图5所示，多级剪叉组件包括二级剪叉组件，若驱动电机24接收到多叶光栅的校准信号，驱动电机24驱动丝杆30沿着顺时针方向旋转，带动第二活动铰链29水平向左运动，以驱动二级剪叉组件做上升运动，二级剪叉组件带动固定于支撑板13的上的电子射野影像装置11上升至等中心平面，电子射野影像装置11采集治疗头34在等中心平面形成的射野形状的图像，以用于校准治疗头34的多叶光栅。在完成多叶光栅的校准之后，驱动电机24驱动丝杆30沿着逆时针方向旋转，带动第二活动铰链29水平向右运动，以驱动二级剪叉组件做下降运动，二级剪叉组件带动固定于支撑板13的上表面的电子射野影像装置11从等中心平面下降至支撑体10的凹槽15内。In a specific example, as shown in FIG. 2 , FIG. 3 , FIG. 4 and FIG. 5 , the multi-stage scissor assembly includes a two-stage scissor assembly. If the drive motor 24 receives the calibration signal of the multi-leaf grating, the drive motor 24 The driving screw 30 rotates clockwise to drive the second living hinge 29 to move horizontally to the left, so as to drive the secondary scissor assembly to move upward, and the secondary scissor assembly drives the electron beam fixed on the support plate 13 The imaging device 11 is raised to the isocenter plane, and the electronic portal imaging device 11 captures an image of the shape of the portal formed by the treatment head 34 on the isocenter plane, so as to calibrate the multi-leaf grating of the treatment head 34 . After the calibration of the multi-leaf grating is completed, the drive motor 24 drives the screw rod 30 to rotate in the counterclockwise direction, and drives the second living hinge 29 to move horizontally to the right, so as to drive the secondary scissor assembly to move downward, and the secondary scissor assembly The electron portal imaging device 11 fixed on the upper surface of the support plate 13 is driven to descend from the isocenter plane into the groove 15 of the support body 10 .

在一些可选实施例中，支撑体10背面凹槽位置对应处设置有辅助屏蔽板16。其中，支撑体10的背面可为支撑体10的仰视面，辅助屏蔽板16由钨合金制成，辅助屏蔽板16的形状可为长方形、正方形、圆形或者椭圆形。籍此，通过在支撑体背面凹槽位置对应处设置辅助屏蔽板，能够对治疗头发出的射线进行补充屏蔽，进一步避免治疗头发出的射线向外部环境泄露给环境造成危害。In some optional embodiments, auxiliary shielding plates 16 are provided at positions corresponding to the grooves on the back of the support body 10 . The back of the support body 10 can be the bottom view of the support body 10 , the auxiliary shielding plate 16 is made of tungsten alloy, and the shape of the auxiliary shielding plate 16 can be rectangular, square, circular or oval. Therefore, by arranging the auxiliary shielding plate at the position corresponding to the groove on the back of the support body, the radiation emitted by the treatment head can be supplemented and shielded, and the radiation emitted by the treatment head can be further prevented from leaking to the external environment and causing harm to the environment.

在一些可选实施例中，凹槽15的内壁周向形成有凸台14，电子射野影像装置11处于治疗状态位置时，支撑板13与凸台14抵靠。其中，凸台14可为环形块状或者由多个单独的几何块状构成，凸台14的形状可为正方形、长方形、椭圆形或者圆形等，凸台的材料可为铅材料或者钨合金等，支撑板13与凸台14抵靠可理解为电子射野影像装置11处于治疗状态位置时，凹槽15的内壁周向与凸台14形成的面与支撑板13的下表面贴合。籍此，在电子射野影像装置处于治疗状态位置时，支撑板抵靠凸台，能够有效固定支撑板和电子射野影像装置，避免支撑板和电子射野影像装置随机架旋转时松动。In some optional embodiments, a boss 14 is formed on the inner wall of the groove 15 in the circumferential direction. When the electron portal imaging device 11 is in the treatment state position, the support plate 13 abuts against the boss 14 . Wherein, the boss 14 may be a ring-shaped block or composed of a plurality of separate geometric blocks, the shape of the boss 14 may be square, rectangle, ellipse or circle, etc., and the material of the boss may be lead material or tungsten alloy etc., the abutment of the support plate 13 and the boss 14 can be understood as when the electron portal imaging device 11 is in the treatment state position, the surface formed by the circumferential direction of the inner wall of the groove 15 and the boss 14 is in contact with the lower surface of the support plate 13 . Therefore, when the electronic portal imaging device is in the treatment state position, the support plate abuts the boss, which can effectively fix the supporting plate and the electronic portal imaging device, and prevent the supporting plate and the electronic portal imaging device from loosening when the frame rotates.

在一些可选实施例中，凸台14与支撑板13的接触面17上设置有至少一个定位销18，支撑板13设置有与至少一个定位销18对应的定位孔23，电子射野影像装置11处于治疗状态位置时，定位销18***对应的定位孔23，支撑板13与凸台14抵靠。籍此，在电子射野影像装置处于治疗状态位置时，通过在凸台与支撑板的接触面上设置至少一个定位销，以及在支撑板上设置与至少一个定位销对应的定位孔，能够有效固定支撑板和电子射野影像装置，进一步避免支撑板和电子射野影像装置随机架旋转时偏摆，造成精度损失。In some optional embodiments, at least one positioning pin 18 is provided on the contact surface 17 of the boss 14 and the support plate 13 , and the support plate 13 is provided with a positioning hole 23 corresponding to the at least one positioning pin 18 . The electronic portal imaging device When the 11 is in the treatment state position, the positioning pin 18 is inserted into the corresponding positioning hole 23 , and the support plate 13 abuts against the boss 14 . Therefore, when the electronic portal imaging device is in the treatment state position, at least one positioning pin is arranged on the contact surface of the boss and the support plate, and a positioning hole corresponding to the at least one positioning pin is arranged on the support plate, which can effectively Fix the support plate and the electronic portal imaging device to further avoid the deflection of the supporting plate and the electronic portal imaging device when the frame is rotated, resulting in loss of accuracy.

在一个具体的例子中，凸台14与支撑板13的接触面17上设置有四个圆柱形的定位销18。相应地，如图6所示，支撑板13设置有与四个定位销18对应的圆形定位孔23。如图7所示，当电子射野影像装置11处于治疗状态位置时，凹槽15的内壁周向与凸台14形成的面与支撑板13的下表面贴合，并且电子射野影像装置11固定于支撑板13的上表面。In a specific example, four cylindrical positioning pins 18 are provided on the contact surface 17 of the boss 14 and the support plate 13 . Correspondingly, as shown in FIG. 6 , the support plate 13 is provided with circular positioning holes 23 corresponding to the four positioning pins 18 . As shown in FIG. 7 , when the electron portal imaging device 11 is in the treatment state position, the surface formed by the circumferential direction of the inner wall of the groove 15 and the boss 14 is in contact with the lower surface of the support plate 13 , and the electron portal imaging device 11 It is fixed to the upper surface of the support plate 13 .

在一些可选实施例中，凹槽15底面与支撑板13之间设置有升降导向机构。具体地，升降导向机构包括多组天线式升降柱32。如图8所示，升降导向机构包括二组天线式升降柱32。二组天线式升降柱32可随剪叉组件进行伸缩。天线式升降柱32呈多级空心圆柱形，小间隙配合，各级之间沿轴向运动，主要起导向作用，避免电子射野影像装置11在升降过程中的位置偏斜，导致电子射野影像装置11位置错误。籍此，通过在凹槽底面与支撑板之间设置升降导向机构，能够有效保证电子射野影像装置的位置的准确性。In some optional embodiments, a lift guide mechanism is provided between the bottom surface of the groove 15 and the support plate 13 . Specifically, the lifting guide mechanism includes multiple groups of antenna-type lifting columns 32 . As shown in FIG. 8 , the lift guide mechanism includes two sets of antenna lift columns 32 . The two sets of antenna-type lifting columns 32 can be extended and retracted with the scissor assembly. The antenna-type lifting column 32 is multi-stage hollow cylindrical, with small gaps, and moves along the axial direction between the stages, which mainly play a guiding role, so as to avoid the positional deviation of the electronic portal imaging device 11 during the lifting process, resulting in the electronic portal The position of the video device 11 is wrong. Therefore, by arranging a lifting guide mechanism between the bottom surface of the groove and the support plate, the accuracy of the position of the electronic portal imaging device can be effectively ensured.

在一些可选实施例中，校准设备还包括：位置检测装置，位置检测装置的主体设置于支撑体10内，且位置检测装置的检测端与电子射野影像装置11连接，位置检测装置用于检测电子射野影像装置11的位置。具体地，位置检测装置包括拉绳传感器，拉绳传感器的钢丝绳与电子射野影像装置11固定连接。拉绳传感器的功能是把机械运动转换成可以计量，记录或传送的电信号。拉绳传感器由可拉伸的不锈钢绳绕在一个有螺纹的轮毂上，此轮毂与一个精密旋转感应器连接在一起，感应器可以是增量编码器、绝对(独立)编码器、混合或导电塑料旋转电位计、同步器或解析器。操作上，拉绳传感器主体安装在支撑体10内，拉绳缚在电子射野影像装置11上。拉绳直线运动和电子射野影像装置11运动轴线对准。运动发生时，拉绳伸展和收缩。一个内部弹簧保证拉绳的张紧度不变。带螺纹的轮毂带动精密旋转感应器旋转，输出一个与拉绳移动距离成比例的电信号。测量输出信号可以得出电子射野影像装置11的位移、方向或速率。籍此，通过拉绳传感器，能够实时地检测电子射野影像装置的位置。In some optional embodiments, the calibration apparatus further includes: a position detection device, the main body of the position detection device is disposed in the support body 10 , and the detection end of the position detection device is connected to the electronic portal imaging device 11 , and the position detection device is used for The position of the electron portal imaging device 11 is detected. Specifically, the position detection device includes a pull-rope sensor, and the wire rope of the pull-rope sensor is fixedly connected to the electronic portal imaging device 11 . The function of the pull cord sensor is to convert mechanical movement into electrical signals that can be measured, recorded or transmitted. The pull cord sensor consists of a stretchable stainless steel cord wrapped around a threaded hub that is connected to a precision rotary sensor, which can be incremental, absolute (independent), hybrid or conductive Plastic rotary potentiometers, synchronizers or resolvers. In operation, the main body of the pull cord sensor is installed in the support body 10 , and the pull cord is tied to the electronic portal imaging device 11 . The linear movement of the pulling rope is aligned with the movement axis of the electronic portal imaging device 11 . The drawstring stretches and contracts as the movement occurs. An internal spring keeps the tension of the drawstring constant. The threaded hub drives the rotation of the precision rotation sensor, which outputs an electrical signal proportional to the distance the cable moves. The displacement, direction or velocity of the electron portal imaging device 11 can be obtained by measuring the output signal. Thereby, the position of the electronic portal imaging device can be detected in real time by the pull-cord sensor.

在一些可选实施例中，电子射野影像装置11的连接线置于拖链内。拖链的第一端与电子射野影像装置11固定连接，并且拖链的第二端与支撑体10固定连接。籍此，通过将电子射野影像装置的连接线置于拖链内，拖链可随电子射野影像装置11升降折叠，从而有效避免电子射野影像装置的连接线对电子射野影像装置升降的影响。In some optional embodiments, the connecting wire of the electronic portal imaging device 11 is placed in the drag chain. The first end of the drag chain is fixedly connected with the electronic portal imaging device 11 , and the second end of the drag chain is fixedly connected with the support body 10 . In this way, by placing the connecting wire of the electronic portal imaging device in the drag chain, the drag chain can be lifted and folded with the electronic portal imaging device 11, thereby effectively preventing the connecting wire of the electronic portal imaging device from lifting and lowering the electronic portal imaging device. Impact.

根据本申请实施例的第二方面，提供一种环形加速器。环形加速器包括：根据本申请实施例的第一方面的多叶光栅的校准设备、治疗头34以及机架33；校准设备以及治疗头34设置于机架33内；校准设备与治疗头34相对。籍此，当升降机构带动电子射野影像装置处于校准状态位置时，电子射野影像装置采集治疗头在等中心平面形成的射野形状的图像，该图像能够客观准确地表征治疗头在等中心平面形成的射野形状，可以真实反映治疗头在等中心平面形成的射野形状的质量和精度，为治疗头的多叶光栅的校准提供准确真实的数据，能够既便捷又精确地对治疗头的多叶光栅进行校准，从而提高多叶光栅校准的精确性、可靠性和便捷性。According to a second aspect of the embodiments of the present application, a ring accelerator is provided. The ring accelerator includes: the multi-leaf grating calibration device according to the first aspect of the embodiment of the present application, the treatment head 34 and the frame 33 ; the calibration device and the treatment head 34 are arranged in the frame 33 ; the calibration device is opposite to the treatment head 34 . In this way, when the lifting mechanism drives the electronic portal imaging device to be in a calibrated position, the electronic portal imaging device collects an image of the shape of the portal formed by the treatment head on the isocenter plane, and the image can objectively and accurately represent the treatment head in the isocenter. The shape of the radiation field formed by the plane can truly reflect the quality and accuracy of the shape of the radiation field formed by the treatment head on the isocenter plane, provide accurate and real data for the calibration of the multi-leaf grating of the treatment head, and can easily and accurately adjust the treatment head. The multi-leaf grating is calibrated, thereby improving the accuracy, reliability and convenience of multi-leaf grating calibration.

在一个具体的例子中，如图9和图10所示，环形加速器的多叶光栅的校准设备设置于环形加速器的环形机架上。当环形加速器旋转至零度时，环形加速器的治疗头34正对着电子射野影像装置11的成像区域12所在的平面，也即是电子射野影像装置11的成像区域12所在的平面与环形加速器的治疗头34发射出的射线束的轴线垂直。如果校准设备处于质保模式，驱动机构接收到环形加速器的多叶光栅的校准信号，驱动机构驱动剪叉组件做上升运动，剪叉组件带动电子射野影像装置11上升至环形加速器的等中心平面，电子射野影像装置11采集治疗头34在等中心平面形成的射野形状的图像，以用于校准环形加速器的治疗头34的多叶光栅。在完成环形加速器的治疗头34的多叶光栅的校准之后，驱动机构驱动剪叉组件做下降运动，剪叉组件带动电子射野影像装置11从等中心平面下降至支撑体10的凹槽15内，电子射野影像装置11随环形机架旋转，并对环形加速器的治疗头34进行射野验证和剂量验证。In a specific example, as shown in FIG. 9 and FIG. 10 , the calibration equipment of the multi-leaf grating of the ring accelerator is arranged on the ring frame of the ring accelerator. When the ring accelerator rotates to zero degrees, the treatment head 34 of the ring accelerator is facing the plane where the imaging area 12 of the electron portal imaging device 11 is located, that is, the plane where the imaging area 12 of the electron portal imaging device 11 is located and the ring accelerator The axis of the radiation beam emitted by the treatment head 34 is vertical. If the calibration equipment is in the quality assurance mode, the drive mechanism receives the calibration signal of the multi-leaf grating of the annular accelerator, the drive mechanism drives the scissors assembly to move upward, and the scissors assembly drives the electronic portal imaging device 11 to rise to the isocenter plane of the annular accelerator, The electronic portal imaging device 11 acquires images of the shape of the portal formed by the treatment head 34 on the isocenter plane, so as to be used for calibrating the multi-leaf grating of the treatment head 34 of the ring accelerator. After the calibration of the multi-leaf grating of the treatment head 34 of the annular accelerator is completed, the driving mechanism drives the scissors assembly to move downward, and the scissors assembly drives the electronic portal imaging device 11 to descend from the isocenter plane to the groove 15 of the support body 10 , the electron portal imaging device 11 rotates with the annular gantry, and performs portal verification and dose verification on the treatment head 34 of the annular accelerator.

当然，实施本申请实施例的任一技术方案必不一定需要同时达到以上的所有优点。Of course, implementing any technical solution of the embodiments of the present application does not necessarily need to achieve all the above advantages at the same time.

在本申请的各种实施方式中所使用的表述“第一”、“第二”、“所述第一”或“所述第二”可修饰各种部件而与顺序和/或重要性无关，但是这些表述不限制相应部件。以上表述仅用于将元件与其它元件区分开的目的。例如，第一用户设备和第二用户设备表示不同的用户设备，虽然两者均是用户设备。例如，在不背离本公开的范围的前提下，第一元件可称作元件，类似地，第二元件可称作第一元件。The expressions "first," "second," "the first," or "the second" as used in various embodiments of this application may modify various elements regardless of order and/or importance , but these expressions do not limit the corresponding parts. The above expressions are only used for the purpose of distinguishing an element from other elements. For example, the first user equipment and the second user equipment represent different user equipments, although both are user equipments. For example, a first element could be termed an element, and, similarly, a second element could be termed a first element, without departing from the scope of the present disclosure.

另外，在本申请的各种实施方式中所使用的表述“前”、“后”、“左”、“右”，在不背离本公开的范围的前提下，仅仅是一种相对位置关系。In addition, the expressions "front", "rear", "left" and "right" used in various embodiments of the present application are merely a relative positional relationship without departing from the scope of the present disclosure.

尽管已描述了本申请的优选，但本领域内的技术人员一旦得知了基本创造性概念，则可对这些作出另外的变更和修改。所以，所附权利要求意欲解释为包括优选以及落入本申请范围的所有变更和修改。显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。While the preferred aspects of the present application have been described, those skilled in the art may make additional changes and modifications to these once the basic inventive concepts are known. Therefore, the appended claims are intended to be construed to include the preferred and all changes and modifications that fall within the scope of this application. Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

一种多叶光栅的校准设备，其特征在于，所述校准设备包括：A multi-leaf grating calibration device, characterized in that the calibration device comprises:

设置于机架(33)上的支撑体(10)；a support body (10) arranged on the frame (33);

一端与所述支撑体(10)连接的升降机构；a lifting mechanism connected to the support body (10) at one end;

与所述升降机构另一端连接的电子射野影像装置(11)；an electronic portal imaging device (11) connected to the other end of the lifting mechanism;

所述升降机构带动所述电子射野影像装置(11)升降，以使所述电子射野影像装置(11)处于不同的工作位置；所述工作位置包括：校准状态位置和治疗状态位置。The lifting mechanism drives the electronic portal imaging device (11) to ascend and descend, so that the electronic portal imaging device (11) is in different working positions; the working positions include: a calibration state position and a treatment state position.
根据权利要求1所述的多叶光栅的校准设备，其特征在于，所述支撑体(10)上设置有用于容纳所述升降机构的凹槽(15)；所述升降机构设置于所述凹槽(15)内。The multi-leaf grating calibration device according to claim 1, characterized in that, a groove (15) for accommodating the lifting mechanism is provided on the support body (10); in the groove (15).
根据权利要求2所述的多叶光栅的校准设备，其特征在于，所述升降机构包括剪叉式升降机构。The multi-leaf grating calibration device according to claim 2, wherein the lifting mechanism comprises a scissors lifting mechanism.
根据权利要求3所述的多叶光栅的校准设备，其特征在于，所述剪叉式升降机构包括：支撑板(13)、剪叉组件、第一导轨(27)以及第二导轨(31)；The multi-leaf grating calibration device according to claim 3, wherein the scissor lift mechanism comprises: a support plate (13), a scissor assembly, a first guide rail (27) and a second guide rail (31) ;

所述支撑板(13)的一面设置有所述电子射野影像装置(11)，相对的另一面设置有所述第一导轨(27)；One side of the support plate (13) is provided with the electronic portal imaging device (11), and the opposite side is provided with the first guide rail (27);

所述剪叉组件的一端与所述第一导轨(27)连接，所述剪叉组件的另一端与所述第二导轨(31)连接；所述剪叉组件为多级剪叉组件；One end of the scissor assembly is connected to the first guide rail (27), and the other end of the scissor assembly is connected to the second guide rail (31); the scissor assembly is a multi-stage scissor assembly;

所述第二导轨(31)固定于所述凹槽(15)底部。The second guide rail (31) is fixed on the bottom of the groove (15).
根据权利要求4所述的多叶光栅的校准设备，其特征在于，The calibration device for multi-leaf grating according to claim 4, wherein,

当所述电子射野影像装置(11)处于所述校准状态位置时，所述剪叉组件处于伸长状态，将所述电子射野影像装置(11)抬升至等中心平面进行多叶光栅的校准；When the electronic portal imaging device (11) is in the calibration state position, the scissor assembly is in an extended state, and the electronic portal imaging device (11) is lifted to the isocenter plane for multi-leaf grating. calibration;

当所述电子射野影像装置(11)处于所述治疗状态位置时，所述剪叉组件处于压缩状态，将所述电子射野影像装置(11)置于所述支撑体(10)的凹槽(15)内。When the electronic portal imaging device (11) is in the treatment state position, the scissor assembly is in a compressed state, and the electronic portal imaging device (11) is placed in the recess of the support (10). in the groove (15).
根据权利要求4所述的多叶光栅的校准设备，其特征在于，所述校准设备还包括：The calibration device of the multi-leaf grating according to claim 4, wherein the calibration device further comprises:

驱动机构，所述驱动机构设置于所述第二导轨(31)上，与所述剪叉组件连接，用于驱动所述剪叉组件做上升运动或者下降运动；所述驱动机构为电机丝杆驱动。A drive mechanism, which is arranged on the second guide rail (31) and is connected to the scissors assembly, and is used to drive the scissors assembly to perform ascending or descending motion; the drive mechanism is a motor screw rod drive.
根据权利要求6所述的多叶光栅的校准设备，其特征在于，所述凹槽(15)的内壁周向形成有凸台(14)，所述电子射野影像装置(11)处于治疗状态位置时，所述支撑板(13)与所述凸台(14)抵靠。The multi-leaf grating calibration device according to claim 6, wherein a boss (14) is formed on the inner wall of the groove (15) in the circumferential direction, and the electronic portal imaging device (11) is in a treatment state When in position, the support plate (13) abuts against the boss (14).
根据权利要求7所述的多叶光栅的校准设备，其特征在于，所述凸台(14)与所述支撑板(13)的接触面(17)上设置有至少一个定位销(18)，所述支撑板(13)设置有与至少一个所述定位销(18)对应的定位孔(23)，所述电子射野影像装置(11)处于治疗状态位置时，所述定位销(18)***对应的所述定位孔(23)，所述支撑板(13)与所述凸台(14)抵靠。The multi-leaf grating calibration device according to claim 7, characterized in that, at least one positioning pin (18) is provided on the contact surface (17) of the boss (14) and the support plate (13), The support plate (13) is provided with a positioning hole (23) corresponding to at least one of the positioning pins (18), and when the electronic portal imaging device (11) is in a treatment state position, the positioning pins (18) The corresponding positioning holes (23) are inserted, and the support plates (13) abut against the bosses (14).
根据权利要求4所述的多叶光栅的校准设备，其特征在于，所述凹槽(15)底面与所述支撑板(13)之间设置有升降导向机构。The multi-leaf grating calibration device according to claim 4, characterized in that a lift guide mechanism is provided between the bottom surface of the groove (15) and the support plate (13).
根据权利要求1所述的多叶光栅的校准设备，其特征在于，所述校准设备还包括：The calibration device for a multi-leaf grating according to claim 1, wherein the calibration device further comprises:

位置检测装置，所述位置检测装置的主体设置于所述支撑体(10)内，且所述位置检测装置的检测端与所述电子射野影像装置(11)连接，所述位置检测装置用于检测所述电子射野影像装置(11)的位置。A position detection device, wherein the main body of the position detection device is arranged in the support body (10), and the detection end of the position detection device is connected to the electronic portal imaging device (11), and the position detection device uses for detecting the position of the electron portal imaging device (11).
根据权利要求1所述的多叶光栅的校准设备，其特征在于，所述电子射野影像装置(11)的连接线置于拖链内。The multi-leaf grating calibration device according to claim 1, characterized in that, the connecting wire of the electronic portal imaging device (11) is placed in a drag chain.
根据权利要求2所述的多叶光栅的校准设备，其特征在于，所述支撑体(10)背面凹槽位置对应处设置有辅助屏蔽板(16)。The calibration device for a multi-leaf grating according to claim 2, characterized in that, an auxiliary shielding plate (16) is provided at a position corresponding to the groove on the back of the support body (10).
一种环形加速器，其特征在于，所述环形加速器包括：A ring accelerator, characterized in that the ring accelerator comprises:

权利要求1-12中任意一项所述的多叶光栅的校准设备、治疗头(34)以及机架(33)；所述校准设备以及所述治疗头(34)设置于所述机架(33)内；所述校准设备与所述治疗头(34)相对。The calibration device, the treatment head (34) and the frame (33) of the multi-leaf grating according to any one of claims 1-12; the calibration device and the treatment head (34) are arranged on the frame ( 33); the calibration device is opposite to the treatment head (34).