WO2023184420A1

WO2023184420A1 - Radiotherapy head, apparatus, method, control device and non-volatile storage medium

Info

Publication number: WO2023184420A1
Application number: PCT/CN2022/084616
Authority: WO
Inventors: 郭召
Original assignee: 西安大医集团股份有限公司
Priority date: 2022-03-31
Filing date: 2022-03-31
Publication date: 2023-10-05
Also published as: CN115103707A

Abstract

The embodiments of the present application relate to the technical field of medical instruments. Disclosed are a radiotherapy head, an apparatus, a method, a control device and a non-volatile storage medium. The radiotherapy head comprises a mounting base, and a ray generation device and a primary collimator, which are arranged on the mounting base, wherein the primary collimator is located on the side of the ray generation device that emits X rays; a turntable is further rotationally arranged on the mounting base, and is provided with a focusing collimation assembly and a conformal collimation assembly; and the focusing collimation assembly and the conformal collimation assembly are configured to be capable of respectively corresponding to the primary collimator, so as to form a focusing radiation field or a conformal radiation field. The arrangement form can be simplified, and the maintainability of the apparatus can be improved, thereby reducing the maintenance costs.

Description

Radiotherapy heads, equipment, methods, control devices and non-volatile storage media

Technical field

This application relates to the technical field of medical devices, specifically a radiotherapy head, equipment, methods, control devices and non-volatile storage media.

Background technique

At present, gamma knife and medical linear accelerator are the two most effective methods for treating tumors. Gamma Knife uses Co-60, a natural radioactive source, and uses a focused treatment head to form a focused beam to treat lesions in a stereotactic manner. It has high treatment accuracy and is especially suitable for the treatment of intracranial lesions. With the help of multi-leaf grating technology, medical linear accelerators use conformal treatment heads to carry out conformal intensity-modulated treatment. The treatment efficiency and accuracy have been greatly improved, and it is the mainstream method for treating large-area lesions on the body.

In related technologies, the focused treatment head and the conformal treatment head will be integrated to form a new treatment system. However, the integrated system is large in size and weight, which increases the complexity and maintenance difficulty of the system. At the same time, the failure rate of the accelerator increases during the working process. High, regular maintenance is required to ensure the stable operation of the system, which brings huge costs to later maintenance. Especially after the focusing head is installed with the source, the multi-leaf grating of the accelerator needs to be maintained inside the equipment, which further adds to the difficulty of maintenance work.

Contents of the invention

This application provides a radiotherapy head, equipment, methods, control devices and non-volatile storage media, which can simplify the setting form, improve the maintainability of the equipment, and thereby reduce maintenance costs.

The embodiment of this application can be implemented as follows:

In one aspect of the embodiment of the present application, a radiotherapy head is provided, including a mounting base, a ray generating device and a primary collimator disposed on the mounting base. The primary collimator is located at the exit of the ray generating device. On one side of the They are configured to respectively correspond to the primary collimators to form a focused radiation field or a conformal radiation field.

Optionally, the focusing and collimating components and the conforming collimating components are arranged in a staggered manner on the turntable, and the focusing and collimating components and the conforming collimating components can avoid each other, so that all The focusing collimation component or the conformal collimation component respectively corresponds to the primary collimator.

Optionally, the turntable is further provided with a guide rail in a direction perpendicular to the moving direction of the conformal alignment assembly, and the focus alignment assembly is slidingly connected to the guide rail.

Optionally, the focusing and collimating assembly includes a first focusing collimator and a second focusing collimator. The first focusing collimator includes a first focusing collimation hole, and the second focusing collimator includes A second focusing collimation hole with a different diameter than the first focusing collimation hole, the first focusing collimator and the second focusing collimator are configured to move along the guide rail to respectively move the third focusing collimator. A focusing collimation hole or the second focusing collimation hole corresponds to the primary collimator.

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

Optionally, 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 correspond to the primary collimator.

Optionally, the conformal collimation component is a double-layer multi-leaf collimator, and the upper leaves and lower leaves in the double-layer multi-leaf collimator are staggered, so that the X-rays emitted by the ray generating device are After passing through the gap between the upper blades, it is blocked by the lower blades.

Optionally, the primary collimator is rotationally 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 ray The X-rays emitted by the generating device pass through the conformal collimation channel or the focusing collimation channel.

Optionally, 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 focus collimation channel are located at the On a cylinder with the central axis of the X-ray as the center.

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

Optionally, the turntable and the mounting base are connected through a turntable bearing, and the mounting base is further provided with a driving member drivingly connected to the turntable bearing to drive the turntable to rotate through the turntable bearing.

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

Another aspect of the embodiment of the present application also provides a radiotherapy equipment, including a rotating frame, and the radiotherapy head as described in any one of the above, and the radiotherapy head is disposed on the rotating frame.

Optionally, the rotating frame can swing back and forth around the X-ray central axis of the ray generating device, or the radiotherapy head can swing in the direction of the rotation axis of the rotating frame.

Optionally, a treatment bed for carrying the target object is also included, and the rotating frame is arranged in cooperation with the treatment bed.

In another aspect of the embodiment of the present application, a method for controlling radiotherapy equipment is also provided, which is used to control the radiotherapy equipment described in any one of the above. The method includes:

Obtain the target patient's treatment plan;

When it is determined that the target object is to be irradiated with focus according to the treatment plan, control the rotation of the turntable that is rotationally connected to the mounting base, and connect the focusing collimator assembly provided on the turntable with the primary collimator provided on the mounting base. Correspondingly, the X-rays emitted by the ray generating device disposed on the mounting base form a focused radiation field through the primary collimator and the focusing collimation assembly;

When it is determined that the target object needs conformal irradiation according to the treatment plan, the turntable connected to the mounting base is controlled to rotate, and the conformal collimation assembly provided on the turntable and the primary collimation assembly provided on the mounting base are The X-rays emitted by the radiation generating device arranged on the mounting base form a conformal radiation field through the primary collimator and the conformal collimating assembly.

Optionally, the method also includes:

When it is determined that the target object is to be irradiated with focus according to the treatment plan, the primary collimator is controlled to rotate relative to the mounting base so that the X-rays emitted by the ray generating device pass through the primary collimator Set the focus collimation channel;

When it is determined that the target object needs conformal irradiation according to the treatment plan, the primary collimator is controlled to rotate relative to the mounting base so that the X-rays emitted by the ray generating device pass through the primary collimator Conformal collimation channel set up on.

Optionally, the method also includes:

Control the rotating frame of the radiotherapy equipment to swing back and forth around the X-ray central axis of the ray generating device, or control the radiotherapy head to swing in the direction of the rotating axis of the rotating frame, so that the rays are generated The X-rays emitted by the device are focused on the target point of the target object from different incident angles.

An 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 execute the steps of the control method for radiotherapy equipment described in any one of the above.

Embodiments of the present application also provide a non-volatile storage medium, a computer program is stored on the storage medium, and when the computer program is run by a processor, the computer program executes any one of the control methods of the radiotherapy equipment described above. step.

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

Through the mounting base, as well as the ray generating device and the primary collimator arranged on the mounting base, the primary collimator is located on the side of the ray generating device that emits X-rays. When the ray generating device emits X-rays, the primary collimator is used to The emitted X-rays are collimated to 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 is rotated to match the required primary collimation channels with Just correspond. Compared with conventional treatment systems that integrate focusing treatment heads and conformal treatment heads, the radiotherapy head in this application uses a ray generating device to generate a point source X-ray, and then limits the X-ray beam through a primary collimator. Finally, a focused radiation field or a conformal radiation field is formed by switching the focusing collimation component and the conformal collimation component set on the turntable, so that focused irradiation or conformal intensity-modulated irradiation can be implemented on the same radiotherapy head. Between the hardware The matching form is simpler, which improves the maintainability of the equipment and reduces maintenance costs.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application and therefore do not It should be regarded as a limitation of the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 is one of the structural schematic diagrams of a radiotherapy head provided by an embodiment of the present application;

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

Figure 3 is a schematic structural diagram of the cooperation between the focusing collimation component and the conformal collimation component provided by the embodiment of the present application;

Figure 4 is a schematic structural diagram of a primary collimator provided by an embodiment of the present application;

Figure 5 is a schematic structural diagram of a conformal alignment component provided by an embodiment of the present application;

Figure 6 is a flow chart of a control method for radiotherapy equipment provided by an embodiment of the present application.

Icon: 100-radiation therapy 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 and collimating components; 152-first focusing collimator; 1522-first focusing and collimating holes; 154-second focusing and collimating holes; 1542-second focusing and collimating holes; 160-conformal collimating components; 162-upper blade; 164-lower blade; 170-turntable bearing; 180-ionization chamber.

Detailed ways

In order to make the purpose, 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 in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments These are part of the embodiments of this application, but not all of them. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Accordingly, the following detailed description of the embodiments of the application provided in the appended drawings is not intended to limit the scope of the claimed application, but rather to represent selected embodiments of the application. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.

It should be noted that similar reference numerals and letters represent similar items in the following figures, therefore, once an item is defined in one figure, it does not need further definition and explanation in subsequent figures.

In the description of this application, it should be noted that the orientation or positional relationship indicated by the terms "inside", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or is the customary placement of the product of this application when in use. The orientation or positional relationship is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second", etc. are only used to differentiate descriptions and are not to be understood as indicating or implying relative importance.

In the description of this application, it should also be noted that, unless otherwise clearly stated and limited, the terms "setting" and "connection" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection, or Integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood on a case-by-case basis.

In view of the related technology, after the focusing treatment head and the conformal treatment head are integrated to form a new treatment system, the volume and weight are large, which increases the complexity and maintenance difficulty of the system. At the same time, the accelerator has a high failure rate during the working process, which requires Frequent maintenance to ensure the stable operation of the system brings huge costs to later maintenance. Especially after the focusing head is installed with the source, the multi-leaf grating of the accelerator needs to be maintained inside the equipment, which further adds to the difficulty of maintenance work. The embodiments of this application provide the following technical solutions to implement focused irradiation and conformal intensity-modulated irradiation treatment on the same equipment in a simplified configuration, thereby improving the maintainability of the equipment and thereby reducing maintenance costs.

Please refer to Figures 1 and 2. The embodiment of the present application provides a radiotherapy head 100, which includes a mounting base 110, a radiation generating device 120 and a primary collimator 130 disposed on the mounting base 110. The primary collimator 130 is located on On the side of the X-ray generating device 120 that emits X-rays, a turntable 140 is also provided for rotation on the mounting base 110. The turntable 140 is provided with a focusing collimation component 150 and a conformal collimation component 160, wherein the focusing collimation component 150 and the conformal collimation component are disposed on the turntable 140. The collimation components 160 are configured to respectively correspond to the primary collimation channels on the primary collimator 130 to form a focused radiation field or a conformal radiation field.

By arranging the ray generating device 120 on the mounting base 110, the ray generating device 120 and the mounting base 110 are stably connected, thereby ensuring the stability of the X-rays emitted by the ray generating device 120. The primary collimator 130 is located on the side where the X-rays are emitted from the ray generating device 120. In this way, the emitted X-rays will be collimated or limited by the primary collimator 130, so that the X-rays emitted through the primary collimator 130 will X-rays can meet subsequent use requirements.

In addition, by rotating the turntable 140 provided on the mounting base 110 and the focus alignment assembly 150 and the conformal alignment assembly 160 provided on the turntable 140, when the turntable 140 rotates relative to the mounting base 110, the focus alignment assembly 150 and the conformal alignment assembly 160 are The conformal collimation component 160 can rotate synchronously with the turntable 140. When the conformal collimation component 160 is used to perform conformal intensity-modulated radiation therapy, a richer conformal radiation 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. Therefore, during radiotherapy, the focusing collimation component 150 or the conformal collimation component 160 can be selected to correspond to the corresponding primary collimation channel on the primary collimator 130 according to actual needs to form a focused beam or a conformal beam. Ye Lai treated the lesions.

The radiotherapy head 100 provided by the embodiment of the present application uses a mounting base 110, a ray generating device 120 and a primary collimator 130 provided on the mounting base 110. The primary collimator 130 is located at a point where the ray generating device 120 emits X-rays. On the other hand, 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 focused. Alignment assembly 150 or conformal alignment assembly 160 is utilized. The primary collimator 130 is rotated to match the required primary collimation channels with The primary collimation channel can be corresponding. Compared with conventional treatment systems that integrate a focused treatment head and a conformal treatment head, the radiotherapy head 100 in this application uses a ray generating device 120 to generate a point source X-ray, and then uses a primary collimator 130 to perform X-ray Beam limiting, and finally by switching the focusing collimation component 150 and the conformal collimation component 160 provided on the turntable 140 to form a focused radiation field or a conformal radiation field, so that focused irradiation or conformal radiation can be implemented on the same radiotherapy head 100 With intensity-modulated irradiation, the coordination between hardware is simpler, which improves equipment maintainability and reduces maintenance costs.

As shown in FIG. 1 , the focusing and collimating components 150 and the conforming collimating components 160 are arranged in a staggered manner on the turntable 140 , and the focusing and collimating components 150 and the conforming collimating components 160 can avoid each other, so that the focusing and collimating components 150 or conformal collimation components 160 respectively correspond to corresponding primary collimation channels on the primary collimator 130 .

By arranging the focus collimation component 150 and the conformal collimation component 160 in a staggered manner on the turntable 140 , both the focus collimation component 150 and the conformal collimation component 160 can be moved to the same position, that is, with the primary collimator 130 corresponding location. When the focus collimation component 150 needs to correspond to the primary collimator 130, the conformal collimation component 160 only needs to be moved outside the active area. Similarly, when the conformal collimating component 160 needs to correspond to the primary collimator 130, it is only necessary to move the focusing collimating component 150 outside the active area group, that is, to retreat the focusing collimating component 150 to the conforming collimator. The maximum boundary of the straight component 160 does not block the normal movement of the blades in the conformal alignment component 160 . The above-mentioned active area is a position corresponding to the primary collimator 130 to form a focused radiation field or a conformal radiation field.

As shown in FIGS. 1 and 3 , the turntable 140 is also provided with a guide rail 142 in a direction perpendicular to the moving direction of the conformal alignment assembly 160 , and the focus alignment assembly 150 is slidingly connected to the guide rail 142 .

It should be noted that when the conformal collimation component 160 moves, it is mainly used for conformal blade movement. The direction of the blade movement is perpendicular to the direction of the guide rail 142. Using the above form, the focusing collimation component 150 and the conformal collimation can be The cooperation between the components 160 is more compact, which is beneficial to reducing the overall volume of the radiotherapy head 100 . At the same time, by sliding the focus collimation assembly 150 and the guide rail 142 to adjust the corresponding position by changing the relative position relationship between the focus collimation assembly 150 and the guide rail 142, the focus collimation assembly 150 and the conformal collimation The components 160 cooperate with each other.

As shown in Figures 2 and 4, the primary collimator 130 is rotationally connected to the mounting base 110. The primary collimation channel provided on the primary collimator 130 includes a conformal collimation channel 132 and a focusing collimation channel 134. The primary collimator When the detector 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.

Using the above method, when it is necessary to form a focused radiation field, the primary collimator 130 is rotated relative to the mounting base 110 to align the focusing collimation channel 134 with the X-rays emitted by the ray generating device 120, so that the X-rays are focused and collimated. The straight channel 134 is emitted, and a focused radiation field is formed under the action of the focusing and collimating assembly 150 . Similarly, when it is necessary to form a conformal radiation field, the primary collimator 130 is rotated relative to the mounting base 110 to align the conformable collimation channel 132 with the X-rays emitted by the ray generating device 120, so that the X-rays are adapted to The conformal collimation channel 132 is emitted, and a focused radiation field is formed under the action of the conformal collimation component 160.

Referring to FIGS. 1 and 3 , the focusing and collimating assembly 150 includes a first focusing collimator 152 and a second focusing collimator 154 . The first focusing collimator 152 includes a first focusing and collimating hole 1522 , and the second focusing collimator 152 . The collimator 154 includes a second focusing collimation hole 1542 with a different aperture than the first focusing collimation hole 1522. The first focusing collimator 152 and the second focusing collimator 154 are configured to move along the guide rail 142 to respectively move the first focusing collimation hole 1542 . The focus collimation hole 1522 or the second focus collimation hole 1542 corresponds to the primary collimator 130 .

Further, the first focusing collimator 152 and the second focusing collimator 154 can be slidably connected to the guide rail 142 through a slide block, and the slide block is connected to a linear driving member so as to drive the sliding movement through the linear driving member, thereby realizing the third focusing collimator. A focusing collimator 152 and a second focusing collimator 154 move along the guide rail 142 . Among them, the linear driving member can also be directly connected to the first focusing collimator 152 and the second focusing collimator 154 respectively, which can also achieve the required purpose. In addition, since the first focus collimator 152 and the second focus collimator 154 can only move along a straight line, in order to ensure that the first focus collimator hole 1522 or the second focus collimator hole 1542 can be connected with the primary collimator 130 Corresponding to the focus collimation channel 134, the first focus collimation hole 1522 and the second focus collimation hole 1542 need to be set on the same straight line. When moving the first focus collimator 152 and the second focus collimator 154, The above required correspondence can be achieved. By setting the first focusing collimation hole 1522 and the second focusing collimation hole 1542 to different apertures, the dose of X-rays can be better controlled and the accuracy of treatment can be achieved. When the primary collimator 130 cooperates with the first focusing collimator 152 or the second focusing collimator 154, the primary collimation channel and the first focusing collimation hole 1522 on the primary collimator 130 and the second focusing collimation The holes 1542 are used in conjunction to form multiple groups of focused radiation fields with different field sizes.

As shown in FIG. 3 , there are multiple first focusing and collimating holes 1522 with different apertures, and there are multiple second focusing and collimating holes 1542 with different apertures.

By arranging first focusing collimation holes 1522 with different apertures on the first focusing collimator 152 , and arranging a plurality of second focusing collimators with different apertures from the first focusing collimation holes 1522 on the second focusing collimator 154 . The straight hole 1542 is beneficial to forming focused radiation fields with different doses. In practical applications, it is only necessary to match the required aperture with the primary collimator 130 . It can be understood that only the first focusing collimator 152 or the second focusing collimator 154 can be provided according to actual needs. In the embodiment of the present application, by arranging the detachable first focusing collimator 152 and the second focusing collimator 154, the conformal collimation assembly 160 can also be modified while ensuring that different step doses can be generated. Giving way will help improve the applicability of the radiotherapy head 100 .

Please refer to FIG. 4 again. In an optional embodiment of the present application, there are multiple focusing collimation channels 134 provided on the primary collimator 130 with different apertures. Using 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, thereby ensuring the dose of the formed focused ray. controllability. In addition, the focus collimation channel 134, the first focus collimation hole 1522 and the second focus collimation hole 1542 can be set in a truncated cone shape, and the aperture of the X-ray incident end is smaller than the aperture of the exit end, so as to reduce the influence of the X-rays on the inner wall. Ensure the quality of the focused radiation field.

As shown in FIGS. 1 and 2 , 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 collimation channel 132 and the focusing collimation channel 134 are located at X The ray is centered on a cylinder centered on its central axis.

For example, the X-ray central axis of the ray generating device 120 may be located at the center of the mounting base 110 , while the rotational central axis of the primary collimator 130 is offset from the center of the 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. This distance D is also the radius of the circle where the conformal collimation channel 132 and the focused collimation channel 134 are located. , the center of the circle is the rotation center axis of the primary collimator 130 . In this way, when the primary collimator 130 is rotated, the channel central axes of the conformal collimation channel 132 and the focusing collimation channel 134 are located on a cylinder centered on the X-ray central axis, thereby forming the required corresponding relationship.

It can be understood that 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 component 160 forms a corresponding conformable radiation field by controlling the extension length of the blades. Among them, the conformal collimation component 160 can use a single-layer multi-page collimator or a double-layer multi-page collimator.

As shown in FIG. 5 , when the conformal collimation component 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-ray emitted from the ray generating device 120 The rays pass through the gaps between the upper blades 162 and are blocked by the lower blades 164 .

The staggered arrangement of the upper blades 162 and the lower blades 164 in the double-layer multi-leaf collimator means that the two sides of the upper blades 162 are located on the lower blades 164 in the orthographic projection of the lower blades 164. In this way, the rays The X-rays emitted by the generating device 120 pass through the gap between the upper blades 162 and are blocked by the lower blades 164 , which can prevent 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 arrangement can reduce the under-blocking area or over-blocking area of the conformal radiation field, making the formed radiation field boundary highly conformable to the desired target area boundary, which greatly protects surrounding organs and improves treatment efficiency.

As shown in Figure 1, the turntable 140 and the mounting base 110 are connected through a turntable bearing 170. The mounting base 110 is also provided with a driving member that is drivingly connected to the turntable bearing 170 to drive the turntable 140 to rotate through the turntable bearing 170.

For example, 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 be connected to the inner ring of the turntable bearing 170 through a driving member. Can.

As shown in FIG. 2 , the mounting base 110 is also provided with an ionization chamber 180 . The ionization chamber 180 is located on the side of the primary collimator 130 opposite to the ray generating device 120 and is located on the emission path of the X-rays. In this way, when the primary collimator 130 switches any focusing collimation channel 134 or the conformal collimation channel 132, the X-ray dose can be monitored to ensure reliability during treatment.

An embodiment of the present application also provides a radiotherapy equipment, which includes a rotating frame and the radiotherapy head 100 in the previous embodiment. The radiotherapy head 100 is disposed on the rotating frame.

By disposing the radiotherapy head 100 on the rotating gantry, when treatment is performed with the focused beam formed by the focusing and collimating assembly 150 of the radiotherapy head 100, the rotating gantry drives the radiotherapy head 100 to swing, so that the focused beam changes from Shoot the target point of the target object from different directions to simulate the state of multiple focused radiation fields irradiating the target point. 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 achieve better results. Reduce trauma to the target subject. When treating the conformal radiation field formed by the conformal collimation assembly 160 of the radiotherapy head 100, two modes, dynamic and static, can be used. When using the static mode, the rotating frame drives the radiotherapy head. 100 irradiates the target volume (PTV) from different angles. At each fixed angle, multiple sub-fields are formed by the conformal collimation component 160 and irradiated step by step. After each sub-field is irradiated, the rays are interrupted, and then the rays are transferred to another sub-field to continue irradiation. The superposition of multiple subfields forms the desired intensity distribution. When using the dynamic mode, the conformal radiation field also irradiates the target area from multiple fixed angles. However, during irradiation, the blades of the conformal collimation assembly 160 move dynamically and continuously. During the movement, the irradiation is uninterrupted. Through the movement of the blades, Adjust intensity distribution. In rotational radiotherapy, as the radiotherapy head 100 rotates, the shape of the radiation field continuously changes to conform to the projected shape of the target area.

In an optional embodiment of the present application, the rotating frame can swing back and forth around the X-ray central axis of the radiation generating device 120, or the radiotherapy head 100 can swing along the direction of the rotation axis of the rotating frame. In this way, multi-angle irradiation can be achieved through the cooperation of the above-mentioned swing forms, so as to better determine a more appropriate action method according to different tumors, thus improving the applicability of the radiotherapy equipment.

In an optional embodiment of the present application, the radiotherapy equipment further includes a treatment bed for carrying the target object, and the rotating frame is arranged in cooperation with the treatment bed. In practical applications, by matching the rotating frame with the treatment bed, while using the treatment bed to move the patient, the rotating frame can be used to ensure a better irradiation area. The treatment bed can be a three-dimensional bed, that is, it can move horizontally in three mutually perpendicular directions, and can also rotate around at least one of the three directions to better cooperate with the rotating frame.

As shown in Figure 6, an embodiment of the present application also provides a control method for radiotherapy equipment, which is used to control the radiotherapy equipment in the previous embodiment. The method includes:

S100. Obtain the treatment plan of the target object.

Among them, obtaining the treatment plan of the target object includes using focused irradiation and conformal irradiation, so that different irradiation forms can be determined according to different treatment plans.

S200. When it is determined that the target object is to be irradiated with focus according to the treatment plan, control the turntable 140 that is rotationally connected to the mounting base 110 to rotate, and connect the focusing collimator assembly 150 provided on the turntable 140 with the primary collimator 130 provided on the mounting base 110 Correspondingly, the X-rays emitted by the ray generating device 120 disposed on the mounting base 110 form a focused radiation field through the primary collimator 130 and the focusing collimation assembly 150 .

It is understandable that when using focused irradiation, it is possible to further determine which size of radiation field to use. After the determination, the primary collimator 130 rotates to move the selected focusing and collimating channel 134 to correspond to the X-ray axis, and then the focusing and collimating assembly 150 also moves the selected focusing and collimating hole to be coaxial with the X-ray. At this time, a selected focusing and collimating channel is formed, so that the X-rays emitted from the ray generating device 120 form the required focused radiation field through the primary collimator 130 and the focusing and collimating assembly 150 .

S300. When it is determined that the target object needs conformal irradiation according to the treatment plan, control the rotating disk 140 connected to the mounting base 110 to rotate, and connect the conformal collimation assembly 160 provided on the rotating disk 140 with the primary collimator provided on the mounting base 110. 130 corresponds to each other, so that the X-rays emitted by the radiation generating device 120 disposed on the mounting base 110 form a conformable radiation field through the primary collimator 130 and the conformable collimating assembly 160 .

When conformal intensity modulated irradiation is used for treatment, the primary collimator 130 rotates, and the conformal collimation channel 132 on the primary collimator 130 is rotated to be coaxial with the X-ray, and the first focusing collimator 152 and the second focusing The collimator 154 moves to both sides to avoid the movement area of the blades, so that the X-rays emitted by the ray generating device 120 form the required conformity through the conformal collimation channel 132 of the primary collimator 130 and the conformable collimation assembly 160 Shooting field.

Through the above control method, the rotation angle of the turntable 140 on the mounting base 110 can be controlled according to different treatment plans, so that the focusing collimation component 150 or the conformal collimation component 160 corresponds to the primary collimator 130, thereby generating the required The focused radiation field or conformal radiation field makes the overall control method simple and efficient.

In an optional embodiment of the present application, the control method of radiotherapy equipment further includes:

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

S310. When it is determined that the target object needs conformal irradiation according to the treatment plan, the primary collimator 130 is controlled to rotate relative to the mounting base 110 so that the Straight channel 132.

In order to ensure the quality and dose of the focused radiation field formed when focused irradiation is used, by controlling the rotation of the primary collimator 130 relative to the mounting base 110, the X-rays emitted by the ray generating device 120 can pass through different focused collimation channels. 134. The X-rays emitted from the focusing and collimating channel 134 are re-injected into the focusing and collimating assembly 150 to form the required focused radiation field. Similarly, when conformal irradiation is used, by controlling the rotation of the primary collimator 130 relative to the mounting base 110, the X-rays emitted from the ray generating device 120 can pass through the conformal collimation channel 132, and exit from the conformal collimation channel 132. The emitted X-rays are then incident on the conformal collimating component 160 to form the required conformal radiation field.

In an optional embodiment of the present application, the control method of radiotherapy equipment also includes:

S400. Control the rotating frame of the radiotherapy equipment to swing back and forth around the X-ray central axis of the radiation generating device 120, or control the radiation therapy head 100 to swing along the direction of the rotating axis of the rotating frame, so that the X-rays emitted by the radiation generating device 120 are Focus on the target point of the target object from different angles of incidence.

Using the above form, while ensuring the irradiation effect, other intact tissues are prevented from being exposed to X-rays for a long time, so as to better reduce the trauma caused to the target object.

Embodiments of the present application also provide a control device, which 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 execute the foregoing embodiments. Steps in the control method of radiotherapy equipment.

Embodiments of the present application also provide a non-volatile storage medium. A computer program is stored on the storage medium. When the computer program is run by a processor, the steps of the control method for the radiotherapy equipment in the aforementioned embodiments are executed.

The above descriptions are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included in the protection scope of this application.

Industrial applicability

To sum up, the radiotherapy head, equipment, method, control device and non-volatile storage medium provided by this application can simplify the setup form, improve the maintainability of the equipment, and thereby reduce maintenance costs.

Claims

A radiotherapy head, characterized by comprising a mounting base, a ray generating device and a primary collimator arranged on the mounting seat, the primary collimator being located on the side where the ray generating device emits X-rays , the mounting base is also provided with a turntable for rotation, and the turntable is provided with a focusing and collimating component and a conforming collimating component, wherein the focusing and collimating component and the conforming collimating component are configured to be connected with each other respectively. The primary collimators correspond to form a focused radiation field or a conformal radiation field.
The radiotherapy head according to claim 1, wherein the focusing collimation components and the conformal collimation components are arranged in a staggered manner on the turntable, and the focusing collimation components and the conformal collimation components are The conformal collimation components can avoid each other, so that the focusing collimation component or the conformal collimation component respectively corresponds to the primary collimator.
The radiotherapy head according to claim 2, wherein a guide rail is provided on the turntable in a direction perpendicular to the moving direction of the conformal collimation component, and the focusing collimation component is slidingly connected to the guide rail. .
The radiotherapy head according to claim 3, wherein the focusing and collimating assembly includes a first focusing collimator and a second focusing collimator, and the first focusing collimator includes a first focusing collimator. hole, the second focusing collimator includes a second focusing collimation hole with a different diameter than the first focusing collimation hole, the first focusing collimator and the second focusing collimator are arranged along The guide rail moves to respectively correspond to the first focus collimation hole or the second focus collimation hole and the primary collimator.
The radiotherapy head according to claim 4, characterized in that there are multiple first focusing and collimating holes with different apertures, and there are multiple second focusing and collimating holes with different apertures.
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 Corresponds to the primary collimator.
The radiotherapy head according to claim 2, characterized in that the conformal collimation component is a double-layer multi-leaf collimator, and the upper leaves and lower leaves in the double-layer multi-leaf collimator are staggered, In this way, the X-rays emitted by the ray generating device pass through the gaps between the upper blades and are blocked by the lower blades.
The radiotherapy head according to claim 1, characterized in that the primary collimator is rotationally connected to the mounting base, and the primary collimator is provided with a conformal collimation channel and a focusing collimation channel, so When the primary collimator rotates, the X-rays emitted by the ray generating device pass through the conformal collimation channel or the focusing collimation channel.
The radiotherapy head according to claim 8, 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 conformal collimation channel and the focusing The channel central axis of the collimation channel is located on a cylinder centered on the X-ray central axis.
The radiotherapy head according to claim 8, characterized in that there are multiple focusing and collimating channels with different apertures.
The radiotherapy head according to claim 1, wherein the turntable and the mounting base are connected through a turntable bearing, and the mounting base is further provided with a driving member drivingly connected to the turntable bearing to The turntable is driven to rotate by the turntable bearing.
The radiotherapy head according to claim 1, wherein an ionization chamber is further provided on the mounting base, and the ionization chamber is located on the side of the primary collimator opposite to the ray generating device, and is located on on the emission path of the X-rays.
A radiotherapy equipment, characterized in that it includes a rotating frame and the radiotherapy head according to any one of claims 1 to 12, the radiotherapy head being arranged on the rotating frame.
The radiotherapy equipment according to claim 13, characterized in that the rotating frame can swing back and forth around the X-ray central axis of the ray generating device, or the radiotherapy head can swing along the rotating frame. swing in the direction of the rotation axis.
The radiotherapy equipment according to claim 13, further comprising a treatment bed for carrying a target object, and the rotating frame is arranged in cooperation with the treatment bed.
A control method for radiotherapy equipment, characterized in that it is used to control the radiotherapy equipment according to any one of claims 14-15, and the method includes:

Obtain the target patient's treatment plan;

When it is determined that the target object is to be irradiated with focus according to the treatment plan, control the rotation of the turntable that is rotationally connected to the mounting base, and connect the focusing collimator assembly provided on the turntable with the primary collimator provided on the mounting base. Correspondingly, the X-rays emitted by the ray generating device disposed on the mounting base form a focused radiation field through the primary collimator and the focusing collimation assembly;

When it is determined that the target object needs conformal irradiation according to the treatment plan, the turntable connected to the mounting base is controlled to rotate, and the conformal collimation assembly provided on the turntable and the primary collimation assembly provided on the mounting base are The X-rays emitted by the radiation generating device arranged on the mounting base form a conformal radiation field through the primary collimator and the conformal collimating assembly.
The method for controlling a radiotherapy head according to claim 16, characterized in that the method further includes:

When it is determined that the target object is to be irradiated with focus according to the treatment plan, the primary collimator is controlled to rotate relative to the mounting base so that the X-rays emitted by the ray generating device pass through the primary collimator Set the focus collimation channel;

When it is determined that the target object needs conformal irradiation according to the treatment plan, the primary collimator is controlled to rotate relative to the mounting base so that the X-rays emitted by the ray generating device pass through the primary collimator Conformal collimation channel set up on.
The method for controlling a radiotherapy head according to claim 16, characterized in that the method further includes:

Control the rotating frame of the radiotherapy equipment to swing back and forth around the X-ray central axis of the ray generating device, or control the radiotherapy head to swing in the direction of the rotating axis of the rotating frame, so that the rays are generated The X-rays emitted by the device are focused on the target point of the target object from different incident angles.
A control device, characterized in that it includes a memory and a processor connected to the memory, and the memory stores machine-readable instructions executable by the processor, so that the processor executes the machine-readable instructions. Read the instructions to execute the steps of the control method of the radiotherapy equipment according to any one of claims 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 control method of the radiotherapy equipment according to any one of claims 16-18. A step of.