Radiation therapy head, device, method, control device and non-volatile storage medium

Abstract

Embodiments of the present application disclose a radiotherapy head, a device, a method, a control device and a non-volatile storage medium, relating to the technical field of medical devices. The radiotherapy head includes a mounting base, a ray generating device and a primary collimator provided on the mounting base. The primary collimator is located on one side of the ray generating device for emitting X-rays. A turntable is rotatably provided on the mounting base, and a focusing collimation assembly and a conformal collimation assembly are provided on the turntable. Wherein, the focusing collimation assembly and the conformal collimation assembly are configured to be respectively corresponding to the primary collimator to form a focused radiation field or a conformal radiation field. It can simplify the setting form, improve the maintainability of the device, and thus reduce the maintenance cost.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and particularly relates to a radiotherapy head, a device, a method, a control device and a non-volatile storage medium. Background Art

[0002] At present, gamma knives and medical linear accelerators are two major effective means for treating tumors. Gamma knives use natural radiation source Co-60, and through a stereotactic method, a focused beam is formed by a focused treatment head to treat the lesion. The treatment accuracy is high, and it is particularly suitable for treating intracranial lesions. With the boost of multi-leaf collimator technology, medical linear accelerators use a conformal treatment head to carry out conformal intensity modulation treatment, and the treatment efficiency and accuracy are greatly improved. It is the mainstream method for treating large-area lesions in the body.

[0003] In related technologies, a focused treatment head and a conformal treatment head are integrated to form a new treatment system. However, the integrated system has a large volume and weight, increasing the complexity and maintenance difficulty of the system. At the same time, during the operation of the accelerator, the failure rate is high, and it needs to be regularly maintained to ensure the stable operation of the system, bringing huge costs for later maintenance. Especially after the focusing head is loaded with the radiation source, it is necessary to maintain the multi-leaf collimator of the accelerator inside the equipment, further increasing the difficulty of maintenance work. Summary of the Invention

[0004] The present application provides a radiotherapy head, a device, a method, a control device and a non-volatile storage medium, which can simplify the setting form, improve the maintainability of the device, and thus reduce the maintenance cost.

[0005] The embodiments of the present application can be implemented as follows:

[0006] On the one hand, an embodiment of the present application provides a radiotherapy head, including a mounting base, a ray generating device and a primary collimator arranged on the mounting base. The primary collimator is located on the side of the ray generating device for emitting X-rays. A turntable is rotatably arranged on the mounting base, and a focusing collimation assembly and a conformal collimation assembly are arranged on the turntable. Among them, the focusing collimation assembly and the conformal collimation assembly are configured to be respectively corresponding to the primary collimator to form a focused radiation field or a conformal radiation field.

[0007] Optionally, the focusing collimation assembly and the conformal collimation assembly are arranged in a staggered manner on the turntable, and the focusing collimation assembly and the conformal collimation assembly can avoid each other so that the focusing collimation assembly or the conformal collimation assembly is respectively corresponding to the primary collimator.

[0008] Optionally, a guide rail is further arranged on the turntable in a direction perpendicular to the moving direction of the conformal collimation assembly, and the focusing collimation assembly is slidably connected to the guide rail.

[0009] Optionally, the focusing and collimating assembly includes a first focusing and collimating device and a second focusing and collimating device. The first focusing and collimating device includes a first focusing and collimating hole, and the second focusing and collimating device includes a second focusing and collimating hole with a different aperture from that of the first focusing and collimating hole. The first focusing and collimating device and the second focusing and collimating device are configured to move along the guide rail to respectively align the first focusing and collimating hole or the second focusing and collimating hole with the primary collimator.

[0010] Optionally, there are multiple first focusing and collimating holes with different apertures, and multiple second focusing and collimating holes with different apertures.

[0011] Optionally, when the first focusing and collimating device and the second focusing and collimating device are respectively located at the ends of the guide rail, the conformal collimating assembly is configured to correspond to the primary collimator.

[0012] Optionally, the conformal collimating assembly is a double-layer multi-leaf collimator. The upper-layer blades and the lower-layer blades in the double-layer multi-leaf collimator are arranged in an interleaved manner, so that the X-rays emitted by the radiation generating device pass through the gaps between the upper-layer blades and are blocked by the lower-layer blades.

[0013] Optionally, the primary collimator is rotatably connected to the mounting base. A conformal collimating channel and a focusing and collimating channel are provided on the primary collimator. When the primary collimator rotates, the X-rays emitted by the radiation generating device pass through the conformal collimating channel or the focusing and collimating channel.

[0014] Optionally, the rotation central axis of the primary collimator is different from the X-ray central axis of the radiation generating device, and the central axes of the conformal collimating channel and the focusing and collimating channel are located on a cylinder centered on the X-ray central axis.

[0015] Optionally, there are multiple focusing and collimating channels with different apertures.

[0016] Optionally, the turntable is connected to the mounting base through a turntable bearing, and a driving member drivingly connected to the turntable bearing is further provided on the mounting base to drive the turntable to rotate through the turntable bearing.

[0017] Optionally, an ionization chamber is further provided on the mounting base. The ionization chamber is located on the side of the primary collimator opposite to the radiation generating device and on the X-ray emission path.

[0018] On the other hand, an embodiment of the present application further provides a radiotherapy device, including a rotating gantry and the radiotherapy head as described in any one of the above, and the radiotherapy head is arranged on the rotating gantry.

[0019] Optionally, the rotating gantry can swing back and forth around the X-ray central axis of the ray generating device, or the radiotherapy head can swing along the rotation axis direction of the rotating gantry.

[0020] Optionally, it further includes a treatment couch for carrying the target object, and the rotating gantry is arranged in cooperation with the treatment couch.

[0021] In another aspect of the embodiments of the present application, there is also provided a control method for a radiotherapy device, which is used to control the radiotherapy device described in any one of the above, and the method includes:

[0022] Obtain the treatment plan of the target object;

[0023] When it is determined according to the treatment plan that the target object adopts focused irradiation, control the turntable rotatably connected to the mounting base to rotate, and make the focused collimator assembly arranged on the turntable correspond to the primary collimator arranged on the mounting base, so that the X-ray emitted by the ray generating device arranged on the mounting base forms a focused radiation field through the primary collimator and the focused collimator assembly;

[0024] When it is determined according to the treatment plan that the target object adopts conformal irradiation, control the turntable rotatably connected to the mounting base to rotate, and make the conformal collimator assembly arranged on the turntable correspond to the primary collimator arranged on the mounting base, so that the X-ray emitted by the ray generating device arranged on the mounting base forms a conformal radiation field through the primary collimator and the conformal collimator assembly.

[0025] Optionally, the method further includes:

[0026] When it is determined according to the treatment plan that the target object adopts focused irradiation, control the primary collimator to rotate relative to the mounting base, so that the X-ray emitted by the ray generating device passes through the focused collimation channel arranged on the primary collimator;

[0027] When it is determined according to the treatment plan that the target object adopts conformal irradiation, control the primary collimator to rotate relative to the mounting base, so that the X-ray emitted by the ray generating device passes through the conformal collimation channel arranged on the primary collimator.

[0028] Optionally, the method further includes:

[0029] Control the rotating gantry of the radiotherapy device to swing back and forth around the X-ray central axis of the ray generating device, or control the radiotherapy head to swing along the rotation axis direction of the rotating gantry, so that the X-ray emitted by the ray generating device focuses on the target point of the target object from different incident angles.

[0030] An embodiment of the present application further provides a control device, including a memory and a processor connected to the memory. The memory stores machine-readable instructions executable by the processor, so that the processor executes the machine-readable instructions to perform the steps of the control method of the radiotherapy device described in any one of the above.

[0031] An embodiment of the present application further provides a non-volatile storage medium, on which a computer program is stored. When the computer program is run by a processor, it executes the steps of the control method of the radiotherapy device described in any one of the above.

[0032] Compared with the existing technology, the beneficial effects of the embodiments of the present application include, for example:

[0033] Through the mounting base, as well as the ray generating device and the primary collimator provided on the mounting base, the primary collimator is located on the side of the ray generating device where X-rays are emitted. When the ray generating device emits X-rays, the primary collimator is used to collimate the emitted X-rays and limit the range of the X-rays, so that the X-rays processed by the primary collimator can be directly utilized by the focusing collimation component or the conformal collimation component. The primary collimator rotates to correspond the required primary collimation channel with the X-rays. In practical applications, it is only necessary to correspond the focusing collimation component or the conformal collimation component with the corresponding primary collimation channel on the primary collimator. Compared with the conventional treatment system integrating a focusing treatment head and a conformal treatment head, the radiotherapy head in the present application uses a ray generating device to generate a point source X-ray, then uses a primary collimator to limit the beam of the X-rays, and finally forms a focusing radiation field or a conformal radiation field by switching the focusing collimation component and the conformal collimation component provided on the turntable. In this way, focusing irradiation or conformal intensity modulation irradiation can be implemented on the same radiotherapy head, the cooperation form between the hardware is simpler, the maintainability of the device is improved, and the maintenance cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present application, so they should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0035] Figure 1 It is one of the structural schematic diagrams of the radiotherapy head provided by the embodiment of the present application;

[0036] Figure 2 It is the second structural schematic diagram of the radiotherapy head provided by the embodiment of the present application;

[0037] Figure 3Schematic diagram of the structure of the focusing collimator assembly and the conformal collimator assembly provided by the embodiment of the present application;

[0038] Figure 4 Schematic diagram of the structure of the primary collimator provided by the embodiment of the present application;

[0039] Figure 5 Schematic diagram of the structure of the conformal collimator assembly provided by the embodiment of the present application;

[0040] Figure 6 Flowchart of the control method of the radiotherapy device provided by the embodiment of the present application.

[0041] Icons: 100 - radiotherapy head; 110 - mounting base; 120 - ray generating device; 130 - primary collimator; 132 - conformal collimation channel; 134 - focusing collimation channel; 140 - turntable; 142 - guide rail; 150 - focusing collimator assembly; 152 - first focusing collimator; 1522 - first focusing collimation hole; 154 - second focusing collimator; 1542 - second focusing collimation hole; 160 - conformal collimator assembly; 162 - upper blades; 164 - lower blades; 170 - turntable bearing; 180 - ionization chamber. Detailed implementation manners

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. Usually, the components of the embodiments of the present application described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0043] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application that is claimed, but merely represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts fall within the scope of protection of the present application.

[0044] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0045] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "inner" and "outer" is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is usually placed during use. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. In addition, terms such as "first" and "second" are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0046] In the description of the present application, it should also be noted that unless otherwise clearly specified and limited, the terms "set" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0047] In the related art, after integrating the focused treatment head and the conformal treatment head to form a new treatment system, the volume and weight are large, increasing the complexity and maintenance difficulty of the system. At the same time, during the operation of the accelerator, the failure rate is high, and it needs to be frequently maintained to ensure the stable operation of the system, bringing huge costs to the later maintenance. Especially after the source is installed in the focusing head, it is necessary to maintain the multi-leaf collimator of the accelerator inside the equipment, further increasing the difficulty of the maintenance work. The embodiments of the present application provide the following technical solutions to simplify the setting form, realize focused irradiation and conformal intensity-modulated irradiation treatment on the same device, improve the maintainability of the device, and thus reduce the maintenance cost.

[0048] Please refer to Figure 1 and Figure 2 , the embodiments of the present application provide a radiotherapy head 100, including a mounting base 110, and a ray generating device 120 and a primary collimator 130 disposed on the mounting base 110. The primary collimator 130 is located on the side of the ray generating device 120 where X-rays are emitted. A turntable 140 is also rotatably disposed on the mounting base 110. A focused collimation assembly 150 and a conformal collimation assembly 160 are disposed on the turntable 140. Among them, the focused collimation assembly 150 and the conformal collimation assembly 160 are configured to be respectively corresponding to the primary collimation channels on the primary collimator 130 to form a focused radiation field or a conformal radiation field.

[0049] By arranging the ray generating device 120 on the mounting base 110, it is convenient for the stable connection between the ray generating device 120 and the mounting base 110, thereby ensuring the stability of the X-rays emitted by the ray generating device 120. The primary collimator 130 is located on one side of the X-rays emitted by the ray generating device 120. In this way, the emitted X-rays will pass through the collimation or beam limiting effect of the primary collimator 130, so that the X-rays emitted through the primary collimator 130 can meet the subsequent usage requirements.

[0050] In addition, through the turntable 140 rotatably arranged on the mounting base 110, and the focusing collimation assembly 150 and the conformal collimation assembly 160 arranged on the turntable 140, when the turntable 140 rotates relative to the mounting base 110, the focusing collimation assembly 150 and the conformal collimation assembly 160 can rotate synchronously with the turntable 140. When using the conformal collimation assembly 160 for conformal intensity modulated radiotherapy, a richer conformal irradiation field can be provided by rotating the turntable 140. The rotation of the turntable 140 is also used to rotate the maintenance area to a position convenient for operation. Thus, during radiotherapy, according to actual needs, the focusing collimation assembly 150 or the conformal collimation assembly 160 can be selected to correspond to the corresponding primary collimation channels on the primary collimator 130 to form a focused radiation field or a conformal radiation field for treating the lesion.

[0051] The radiotherapy head 100 provided by the embodiment of the present application, through the mounting base 110, and the ray generating device 120 and the primary collimator 130 arranged on the mounting base 110, the primary collimator 130 is located on one side of the X-rays emitted by the ray generating device 120. When the ray generating device 120 emits X-rays, the primary collimator 130 is used to collimate the emitted X-rays and limit the range of the X-rays, so that the X-rays processed by the primary collimator 130 can be directly utilized by the focusing collimation assembly 150 or the conformal collimation assembly 160. The primary collimator 130 corresponds the required primary collimation channels to the X-rays by rotation. In actual applications, only the focusing collimation assembly 150 or the conformal collimation assembly 160 needs to be corresponded to the corresponding primary collimation channels on the primary collimator 130. Compared with the conventional treatment system integrating a focused treatment head and a conformal treatment head, the radiotherapy head 100 in the present application uses one ray generating device 120 to generate a point source X-ray, then uses one primary collimator 130 to limit the beam of the X-rays, and finally forms a focused radiation field or a conformal radiation field by switching the focusing collimation assembly 150 and the conformal collimation assembly 160 arranged on the turntable 140. In this way, focused irradiation or conformal intensity modulated irradiation can be implemented on the same radiotherapy head 100, the cooperation form between the hardware is simpler, the maintainability of the equipment is improved, and the maintenance cost is reduced.

[0052] Such as Figure 1As shown, the focusing collimator assembly 150 and the conformal collimator assembly 160 are staggeredly arranged on the turntable 140, and the focusing collimator assembly 150 and the conformal collimator assembly 160 can avoid each other so that the focusing collimator assembly 150 or the conformal collimator assembly 160 respectively corresponds to the corresponding primary collimation channels on the primary collimator 130.

[0053] By staggeredly arranging the focusing collimator assembly 150 and the conformal collimator assembly 160 on the turntable 140, both the focusing collimator assembly 150 and the conformal collimator assembly 160 can be moved to the same position, that is, the position corresponding to the primary collimator 130. When the focusing collimator assembly 150 needs to correspond to the primary collimator 130, only the conformal collimator assembly 160 needs to be moved outside the working area. Similarly, when the conformal collimator assembly 160 needs to correspond to the primary collimator 130, only the focusing collimator assembly 150 needs to be moved outside the working area group, that is, the focusing collimator assembly 150 is retracted to the maximum boundary of the conformal collimator assembly 160 without blocking the normal movement of the blades in the conformal collimator assembly 160. Among them, the above-mentioned working area is the position corresponding to the primary collimator 130 to form a focused radiation field or a conformal radiation field.

[0054] As Figure 1 and Figure 3 shown, a guide rail 142 is also arranged on the turntable 140 in a direction perpendicular to the moving direction of the conformal collimator assembly 160, and the focusing collimator assembly 150 is slidably connected to the guide rail 142.

[0055] It should be noted that when the conformal collimator assembly 160 moves, it is mainly used for the blade movement for conformal shaping. The direction of the blade movement is perpendicular to the direction where the guide rail 142 is located. Adopting the above form can make the cooperation between the focusing collimator assembly 150 and the conformal collimator assembly 160 more compact, which is beneficial to reducing the overall volume of the radiotherapy head 100. At the same time, by slidably connecting the focusing collimator assembly 150 to the guide rail 142, it is convenient to adjust the corresponding position by changing the relative position relationship between the focusing collimator assembly 150 and the guide rail 142, so that the focusing collimator assembly 150 and the conformal collimator assembly 160 cooperate with each other.

[0056] As Figure 2 and Figure 4 shown, the primary collimator 130 is rotatably connected to the mounting seat 110. The primary collimation channels provided on the primary collimator 130 include a conformal collimation channel 132 and a focusing collimation channel 134. When the primary collimator 130 rotates, the X-rays emitted by the ray generating device 120 pass through the conformal collimation channel 132 or the focusing collimation channel 134.

[0057] In the above - mentioned manner, when a focused radiation field needs to be formed, the primary collimator 130 rotates relative to the mounting base 110 to align the focused collimation channel 134 with the X - rays emitted by the radiation generating device 120. Thus, the X - rays are emitted through the focused collimation channel 134 and form a focused radiation field under the action of the focused collimation assembly 150. Similarly, when a conformal radiation field needs to be formed, the primary collimator 130 rotates relative to the mounting base 110 to align the conformal collimation channel 132 with the X - rays emitted by the radiation generating device 120. Thus, the X - rays are emitted through the conformal collimation channel 132 and form a focused radiation field under the action of the conformal collimation assembly 160.

[0058] Please refer to Figure 1 and Figure 3 , the focused collimation assembly 150 includes a first focused collimator 152 and a second focused collimator 154. The first focused collimator 152 includes a first focused collimation hole 1522, and the second focused collimator 154 includes a second focused collimation hole 1542 with a different aperture from that of the first focused collimation hole 1522. The first focused collimator 152 and the second focused collimator 154 are configured to move along the guide rail 142 to align the first focused collimation hole 1522 or the second focused collimation hole 1542 with the primary collimator 130 respectively.

[0059] Furthermore, the first focused collimator 152 and the second focused collimator 154 can be slidably connected to the guide rail 142 through sliders, and the sliders are connected to a linear driving member, so as to drive the sliders to move through the linear driving member, thereby realizing the movement of the first focused collimator 152 and the second focused collimator 154 along the guide rail 142. Among them, the linear driving member can also be directly connected to the first focused collimator 152 and the second focused collimator 154 respectively, which can also achieve the required purpose. In addition, since the first focused collimator 152 and the second focused collimator 154 can only move in a straight line, in order to ensure that the first focused collimation hole 1522 or the second focused collimation hole 1542 can correspond to the focused collimation channel 134 on the primary collimator 130, the first focused collimation hole 1522 and the second focused collimation hole 1542 need to be arranged on the same straight line, and the above - required corresponding relationship can be achieved when moving the first focused collimator 152 and the second focused collimator 154. By setting the first focused collimation hole 1522 and the second focused collimation hole 1542 to have different apertures, it is convenient to better control the dose of X - rays and achieve the accuracy of treatment. When the primary collimator 130 cooperates with the first focused collimator 152 or the second focused collimator 154, the primary collimation channel on the primary collimator 130 is used in combination with the first focused collimation hole 1522 and the second focused collimation hole 1542 to facilitate the formation of multiple groups of focused irradiation fields with different radiation field sizes.

[0060] Such as Figure 3As shown, there are multiple first focusing and collimating holes 1522 with different apertures, and multiple second focusing and collimating holes 1542 with different apertures.

[0061] By providing first focusing and collimating holes 1522 with different apertures on the first focusing collimator 152, and providing multiple second focusing and collimating holes 1542 with apertures different from those of the first focusing and collimating holes 1522 on the second focusing collimator 154, it is beneficial to form focusing radiation fields with different doses. In practical applications, only the required aperture needs to be corresponded with the primary collimator 130. It can be understood that, according to actual needs, only the first focusing collimator 152 or the second focusing collimator 154 can also be provided. In the embodiment of the present application, by providing separable first and second focusing collimators 152 and 154, on the premise of ensuring the ability to generate different stepped doses, it is also possible to make way for the conformal collimator assembly 160, which is beneficial to improving the applicability of the radiotherapy head 100.

[0062] Please refer again to Figure 4 In an alternative embodiment of the present application, there are multiple focusing and collimating channels 134 provided on the primary collimator 130 with different apertures. In the above form, each focusing and collimating channel 134 on the primary collimator 130 can have a one-to-one correspondence with the first focusing and collimating hole 1522 or the second focusing and collimating hole 1542 respectively, so as to ensure the controllability of the dose of the formed focused rays. In addition, the focusing and collimating channels 134, the first focusing and collimating holes 1522 and the second focusing and collimating holes 1542 can be set in a frustum shape, and the aperture of the X-ray incident end is smaller than that of the exit end, so as to reduce the influence of the inner wall on the X-ray and ensure the quality of the formed focusing radiation field.

[0063] As Figure 1 and Figure 2 shown, the rotation central axis of the primary collimator 130 is different from the X-ray central axis of the ray generating device 120, and the channel central axes of the conformal collimating channel 132 and the focusing and collimating channel 134 are located on a cylinder centered on the X-ray central axis.

[0064] Exemplarily, the X-ray central axis of the ray generating device 120 can be located at the center of the mounting base 110, while the rotation central axis of the primary collimator 130 deviates from the center of the above-mentioned mounting base 110. And the distance between the X-ray central axis of the ray generating device 120 and the rotation central axis of the primary collimator 130 is D, and this distance D is also the radius of the circle where the conformal collimating channel 132 and the focusing and collimating channel 134 are located, and the center of this circle is the rotation central axis of the primary collimator 130. In this way, when the primary collimator 130 rotates, the channel central axes of the conformal collimating channel 132 and the focusing and collimating channel 134 are located on a cylinder centered on the X-ray central axis, so as to form the required corresponding relationship.

[0065] Understandably, when the first focusing collimator 152 and the second focusing collimator 154 are respectively located at the ends of the guide rail 142, the conformal collimation assembly 160 is configured to correspond to the primary collimator 130. At this time, the conformal collimation assembly 160 forms a corresponding conformal radiation field by controlling the extension length of the blades. Among them, the conformal collimation assembly 160 can adopt a single-layer multi-leaf collimator or a double-layer multi-leaf collimator.

[0066] Such as Figure 5 As shown, when the conformal collimation assembly 160 is a double-layer multi-leaf collimator, the upper blades 162 and the lower blades 164 in the double-layer multi-leaf collimator are staggered, so that the X-rays emitted by the radiation generating device 120 are blocked by the lower blades 164 after passing through the gaps between the upper blades 162.

[0067] The upper blades 162 and the lower blades 164 in the double-layer multi-leaf collimator are staggered, which means that the projections of the two sides of the upper blades 162 on the lower blades 164 are located on the lower blades 164. In this way, the X-rays emitted by the radiation generating device 120 are blocked by the lower blades 164 after passing through the gaps between the upper blades 162, which can prevent the leakage radiation generated between the sides of two adjacent upper blades 162 from directly passing through the lower blades 164. At the same time, the above setting form can reduce the under-blocked area or over-blocked area of the conformal radiation field, make the formed radiation field boundary highly conform to the target area boundary expected to be formed, greatly protect the surrounding organs, and improve the treatment efficiency.

[0068] Such as Figure 1 As shown, the turntable 140 is connected to the mounting base 110 through a turntable bearing 170, and a driving member drivingly connected to the turntable bearing 170 is further provided on the mounting base 110 to drive the turntable 140 to rotate through the turntable bearing 170.

[0069] Exemplarily, the turntable bearing 170 includes an outer ring connected to the mounting base 110 and an inner ring connected to the turntable 140. When the turntable 140 needs to rotate relative to the mounting base 110, it only needs to connect the driving member to the inner ring of the turntable bearing 170.

[0070] Such as Figure 2 As shown, an ionization chamber 180 is further provided on the mounting base 110. The ionization chamber 180 is located on the side of the primary collimator 130 opposite to the radiation generating device 120 and on the X-ray emission path. In this way, when any one of the focusing collimation channels 134 or the conformal collimation channel 132 of the primary collimator 130 is switched, the dose of X-rays can be monitored to ensure the reliability during treatment.

[0071] The embodiment of the present application further provides a radiotherapy device, which includes a rotating gantry and the radiotherapy head 100 in the foregoing embodiment. The radiotherapy head 100 is disposed on the rotating gantry.

[0072] By disposing the radiotherapy head 100 on the rotating gantry, when treating with the focused radiation field formed by the focusing collimator assembly 150 of the radiotherapy head 100, the rotating gantry drives the radiotherapy head 100 to swing, so that the focused radiation field irradiates the target point of the target object from different orientations, simulating the state of irradiating the target point with multiple focused radiation fields. While ensuring the irradiation effect, other intact tissues are prevented from being irradiated by the focused radiation field for a long time, so as to better reduce the trauma caused to the target object. When treating with the conformal radiation field formed by the conformal collimator assembly 160 of the radiotherapy head 100, two modes, namely dynamic and static modes, can be adopted. When using the static mode, the rotating gantry drives the radiotherapy head 100 to irradiate the target area (planning target volume, PTV) from different angles. At each fixed angle, multiple sub-fields are formed by the conformal collimator assembly 160 and irradiated step by step. After each sub-field is irradiated, the ray is interrupted, and then adjusted to another sub-field for continuous irradiation. The superposition of multiple sub-fields forms the desired intensity distribution. When using the dynamic mode, the conformal radiation field also irradiates the target area from multiple fixed angles, but during irradiation, the leaves of the conformal collimator assembly 160 move continuously and dynamically, and the irradiation is uninterrupted during the movement process. The intensity distribution is adjusted through the movement of the leaves. In rotational radiotherapy, as the radiotherapy head 100 rotates, the shape of the formed radiation field continuously changes to conform to the projected shape of the target area.

[0073] In an alternative embodiment of the present application, the rotating gantry can swing back and forth around the X-ray central axis of the ray generating device 120, or the radiotherapy head 100 can swing along the rotation axis direction of the rotating gantry. In this way, through the cooperation of the above-mentioned swinging forms, multi-angle irradiation can be achieved, so as to better determine a more suitable movement mode according to different tumors, thereby improving the applicability of the radiotherapy device.

[0074] In an alternative embodiment of the present application, the radiotherapy device further includes a treatment couch for carrying the target object, and the rotating gantry is cooperatively disposed with the treatment couch. In actual applications, by cooperating the rotating gantry with the treatment couch, while the treatment couch moves the patient, the rotating gantry can be used to ensure a better irradiation area. Among them, the treatment couch can be a three-dimensional couch, that is, it can move horizontally in three mutually perpendicular directions and can also rotate around at least one of the three directions, so as to better cooperate with the rotating gantry.

[0075] The embodiment of the present application further provides a control method for a radiotherapy device, which is used to control the radiotherapy device in the foregoing embodiment. The method includes:

[0076] S100. Obtain the treatment plan of the target object.

[0077] Among them, obtaining the treatment plan of the target object includes adopting the form of focused irradiation and the form of conformal irradiation, so as to determine different irradiation forms according to different treatment plans.

[0078] S200. When it is determined according to the treatment plan that the target object adopts focused irradiation, control the turntable 140 rotatably connected to the mounting base 110 to rotate, so that the focused collimation assembly 150 provided on the turntable 140 corresponds to the primary collimator 130 provided on the mounting base 110, so that the X-rays emitted by the ray generating device 120 provided on the mounting base 110 pass through the primary collimator 130 and the focused collimation assembly 150 to form a focused radiation field.

[0079] It can be understood that when adopting focused irradiation, it is also possible to further determine which size specification of the radiation field is adopted. After determination, the primary collimator 130 rotates to move the selected focused collimation channel 134 to correspond to the X-ray axis. Subsequently, the focused collimation assembly 150 also moves the selected focused collimation hole to the coaxial position with the X-ray. At this time, a selected focused collimation channel is formed, so that the X-rays emitted by the ray generating device 120 pass through the primary collimator 130 and the focused collimation assembly 150 to form the required focused radiation field.

[0080] S300. When it is determined according to the treatment plan that the target object adopts conformal irradiation, control the turntable 140 rotatably connected to the mounting base 110 to rotate, so that the conformal collimation assembly 160 provided on the turntable 140 corresponds to the primary collimator 130 provided on the mounting base 110, so that the X-rays emitted by the ray generating device 120 provided on the mounting base 110 pass through the primary collimator 130 and the conformal collimation assembly 160 to form a conformal radiation field.

[0081] When using conformal intensity modulated radiotherapy, the primary collimator 130 rotates to rotate the conformal collimation channel 132 on the primary collimator 130 to be coaxial with the X-ray. The first focused collimator 152 and the second focused collimator 154 move to both sides to avoid the movement area of the leaves, so that the X-rays emitted by the ray generating device 120 pass through the conformal collimation channel 132 of the primary collimator 130 and the conformal collimation assembly 160 to form the required conformal radiation field.

[0082] Through the above control method, it is possible to control the rotation angle of the turntable 140 on the mounting base 110 according to different treatment plans, so that the focused collimation assembly 150 or the conformal collimation assembly 160 corresponds to the primary collimator 130, and then generate the required focused radiation field or conformal radiation field, making the overall control method simple and efficient.

[0083] In an alternative embodiment of the present application, the control method of the radiotherapy device further includes:

[0084] S210. When it is determined according to the treatment plan that the target object adopts focused irradiation, control the primary collimator 130 to rotate relative to the mounting base 110, so that the X-ray emitted by the ray generating device 120 passes through the focused collimation channel 134 provided on the primary collimator 130.

[0085] S310. When it is determined according to the treatment plan that the target object adopts conformal irradiation, control the primary collimator 130 to rotate relative to the mounting base 110, so that the X-ray emitted by the ray generating device 120 passes through the conformal collimation channel 132 provided on the primary collimator 130.

[0086] In order to ensure the quality and dose of the formed focused radiation field during focused irradiation, by controlling the rotation of the primary collimator 130 relative to the mounting base 110, the X-ray emitted by the ray generating device 120 can pass through different focused collimation channels 134, and the X-ray emitted from the focused collimation channel 134 is then incident on the focused collimation assembly 150 to form the required focused radiation field. Similarly, during conformal irradiation, by controlling the rotation of the primary collimator 130 relative to the mounting base 110, the X-ray emitted by the ray generating device 120 can pass through the conformal collimation channel 132, and the X-ray emitted from the conformal collimation channel 132 is then incident on the conformal collimation assembly 160 to form the required conformal radiation field.

[0087] In an alternative embodiment of the present application, the control method of the radiotherapy device further includes:

[0088] S400. Control the rotating gantry of the radiotherapy device to swing back and forth around the X-ray central axis of the ray generating device 120, or control the radiotherapy head 100 to swing along the rotation axis direction of the rotating gantry, so that the X-ray emitted by the ray generating device 120 focuses on the target point of the target object from different incident angles.

[0089] Adopting the above form, while ensuring the irradiation effect, it avoids other intact tissues from being irradiated by X-rays for a long time, so as to better reduce the trauma caused to the target object.

[0090] The embodiment of the present application also provides a control device, including a memory and a processor connected to the memory. The memory stores machine-readable instructions executable by the processor, so that the processor executes the machine-readable instructions to perform the steps of the control method of the radiotherapy device in the foregoing embodiments.

[0091] The embodiment of the present application also provides a non-volatile storage medium, on which a computer program is stored. When the computer program is run by the processor, it executes the steps of the control method of the radiotherapy device in the foregoing embodiments.

[0092] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

[0093] Industrial applicability

[0094] In summary, the radiotherapy head, device, method, control device and non-volatile storage medium provided by the present application can simplify the setting form, improve the maintainability of the device, and thus reduce the maintenance cost.

Claims

1. A radiotherapy head, characterized in that, Comprising a mounting base, as well as a ray generating device and a primary collimator provided on the mounting base, wherein: The ray generating device is configured to generate a point source X-ray; The primary collimator is located on one side of the X-ray emitted by the ray generating device. The primary collimator is rotatably connected to the mounting base. The primary collimator is provided with a conformal collimation channel and a focusing collimation channel. When the primary collimator rotates, the X-ray emitted by the ray generating device passes through the conformal collimation channel or the focusing collimation channel; A turntable is also rotatably provided on the mounting base. A focusing collimation assembly and a conformal collimation assembly are provided on the turntable. Among them, the focusing collimation assembly and the conformal collimation assembly are configured to be respectively corresponding to the primary collimator to form a focused radiation field or a conformal radiation field; A guide rail is further provided on the turntable in a direction perpendicular to the moving direction of the conformal collimation assembly. The focusing collimation assembly is slidably connected to the guide rail; When forming a focused radiation field, the primary collimator rotates relative to the mounting base to correspond the focusing collimation channel to the X-ray emitted by the ray generating device, moves the conformal collimation assembly to outside the action area, and enables the X-ray to be emitted through the focusing collimation channel; when forming a conformal radiation field, the primary collimator rotates relative to the mounting base to correspond the conformal collimation channel to the X-ray emitted by the ray generating device, moves the focusing collimation assembly to outside the action area group, does not block the normal movement of the blades in the conformal collimation assembly, and enables the X-ray to be emitted through the conformal collimation channel.

2. The radiotherapy head according to claim 1, wherein The focusing collimation assembly and the conformal collimation assembly are arranged in a staggered manner on the turntable, and the focusing collimation assembly and the conformal collimation assembly can avoid each other so that the focusing collimation assembly or the conformal collimation assembly is respectively corresponding to the primary collimator.

3. The radiotherapy head according to claim 1, characterized in that, The focusing collimation assembly includes a first focusing collimator and a second focusing collimator. The first focusing collimator includes a first focusing collimation hole. The second focusing collimator includes a second focusing collimation hole with a different aperture from that of the first focusing collimation hole. The first focusing collimator and the second focusing collimator are configured to move along the guide rail to respectively correspond the first focusing collimation hole or the second focusing collimation hole to the primary collimator.

4. The radiotherapy head according to claim 3, characterized in that, There are multiple first focusing collimation holes with different apertures, and there are multiple second focusing collimation holes with different apertures.

5. The radiotherapy head according to claim 3, characterized in that, When the first focusing collimator and the second focusing collimator are respectively located at the ends of the guide rail, the conformal collimation assembly is configured to be corresponding to the primary collimator.

6. The radiotherapy head according to claim 2, wherein, The conformal collimation assembly is a double-layer multi-leaf collimator. The upper-layer blades and the lower-layer blades in the double-layer multi-leaf collimator are arranged in a staggered manner so that the X-ray emitted by the ray generating device is blocked by the lower-layer blades after passing through the gaps between the upper-layer blades.

7. The radiotherapy head according to claim 1, characterized in that, The rotation central axis of the primary collimator is different from the X-ray central axis of the ray generating device, and the channel central axes of the conformal collimation channel and the focusing collimation channel are located on a cylinder centered on the X-ray central axis.

8. The radiotherapy head according to claim 1, characterized in that, The focusing and collimating channels are multiple and have different apertures.

9. The radiotherapy head according to claim 1, characterized in that, The turntable is connected to the mounting base through a turntable bearing, and a driving member drivingly connected to the turntable bearing is further provided on the mounting base to drive the turntable to rotate through the turntable bearing.

10. The radiotherapy head according to claim 1, characterized in that, An ionization chamber is further provided on the mounting base. The ionization chamber is located on a side of the primary collimator away from the ray generating device and on the outgoing path of the X-ray.

11. A radiotherapy device, characterized in that, It includes a rotating gantry and the radiotherapy head according to any one of claims 1-10, and the radiotherapy head is provided on the rotating gantry.

12. The radiotherapy device according to claim 11, characterized in that, The rotating gantry can swing back and forth around the X-ray central axis of the ray generating device, or the radiotherapy head can swing along the rotation axis direction of the rotating gantry.

13. The radiotherapy device according to claim 11, characterized in that, It further includes a treatment couch for carrying a target object, and the rotating gantry and the treatment couch are cooperatively arranged.

14. A control method for a radiotherapy device, characterized in that, For controlling the radiotherapy device according to any one of claims 11-13, the method includes: Obtaining a treatment plan of a target object; When it is determined according to the treatment plan that the target object adopts focused irradiation, controlling the turntable rotatably connected to the mounting base to rotate, and corresponding the focusing collimating assembly provided on the turntable with the primary collimator provided on the mounting base, so that the X-ray emitted by the ray generating device provided on the mounting base forms a focused radiation field through the primary collimator and the focusing collimating assembly; When it is determined according to the treatment plan that the target object adopts conformal irradiation, controlling the turntable rotatably connected to the mounting base to rotate, and corresponding the conformal collimating assembly provided on the turntable with the primary collimator provided on the mounting base, so that the X-ray emitted by the ray generating device provided on the mounting base forms a conformal radiation field through the primary collimator and the conformal collimating assembly.

15. The control method of the radiotherapy device according to claim 14, characterized in that, The method further includes: When it is determined according to the treatment plan that the target object adopts focused irradiation, controlling the primary collimator to rotate relative to the mounting base, so that the X-ray emitted by the ray generating device passes through the focusing collimating channel provided on the primary collimator; When it is determined according to the treatment plan that the target object adopts conformal irradiation, controlling the primary collimator to rotate relative to the mounting base, so that the X-ray emitted by the ray generating device passes through the conformal collimating channel provided on the primary collimator.

16. The control method of the radiotherapy device according to claim 14, wherein, The method further includes: Controlling the rotating gantry of the radiotherapy device to swing back and forth around the X-ray central axis of the ray generating device, or controlling the radiotherapy head to swing along the rotation axis direction of the rotating gantry, so that the X-ray emitted by the ray generating device focuses on the target point of the target object from different incident angles.

17. A control device, characterized in that, It includes a memory and a processor connected to the memory. The memory stores machine-readable instructions executable by the processor, so that the processor executes the machine-readable instructions to perform the steps of the control method of the radiotherapy device according to any one of claims 14-16.

18. A non-volatile storage medium, characterized in that, A computer program is stored on the storage medium, and when the computer program is run by a processor, it executes the steps of the control method of the radiotherapy device according to any one of claims 14-16.

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