CN215691126U - Radiotherapy system - Google Patents
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- CN215691126U CN215691126U CN202023350437.8U CN202023350437U CN215691126U CN 215691126 U CN215691126 U CN 215691126U CN 202023350437 U CN202023350437 U CN 202023350437U CN 215691126 U CN215691126 U CN 215691126U
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Abstract
The present application relates to a radiotherapy system, wherein, this radiotherapy system includes: a frame, a radiation source device and an imaging device; the radiation source device is arranged on the frame; the radiation source device is used for carrying out radiation treatment on a patient and is switched among different working positions through overturning; the imaging device is used for imaging a portion of a patient's body. Above-mentioned radiotherapy system can make the source device of giving up be in different operating position to can guarantee through increasing image equipment that the pendulum position precision of pendulum position in-process is higher, further messenger's effect that the ray shines is more ideal, avoids causing the damage to other regions of patient. When the radiotherapy system carries out treatment, can utilize image equipment to carry out real-time imaging to ensure the position accuracy of target region and ray irradiation region, and can detect the dose of bundle of rays in real time, in order to ensure the effect of treatment.
Description
Technical Field
The application relates to the technical field of medical equipment, in particular to a radiotherapy system.
Background
The radiotherapy system is a therapeutic device widely applied to diseases such as tumor. The radiotherapy system projects the radioactive rays emitted by the radioactive source to the focus area, so that the focus area generates a biological effect, and the purpose of treating diseases is achieved. The radiation includes alpha, beta and gamma rays generated by radioactive isotopes, and x-rays, electron beams, proton beams and other particle beams generated by various x-ray therapeutic machines or accelerators.
In the prior art, a body radiotherapy system using cobalt 60 as a radiation source is used to place a patient on a treatment couch of the radiotherapy system and to load the patient on a radiation irradiation area by the treatment couch, so that the radiotherapy system irradiates the area to be irradiated of the patient with radiation. When the patient is moved to the radiation irradiation region, the positional relationship between the region to be irradiated of the patient and the radiation irradiation region of the radiotherapy system can be determined only based on the experience of the operator. This causes an error between the region to be irradiated and the irradiation region, which leads to an undesirable effect of the irradiation, and also causes damage to the patient by irradiating the radiation to a region other than the region to be irradiated.
SUMMERY OF THE UTILITY MODEL
The embodiment of the present application provides a radiotherapy system to at least solve the problems in the related art.
The embodiment of the application provides a radiotherapy system, radiotherapy system includes: a frame, a radiation source device and an imaging device; the radiation source device is arranged on the frame; the radiation source device is used for carrying out radiation treatment on a patient and rotates between different working positions; the imaging device is used for imaging a portion of a patient's body.
In one embodiment, the imaging beam centerline of the imaging device is non-coplanar with the treatment beam centerline of the source arrangement.
In one embodiment, the source arrangement is configured to be flipped over to form a first treatment mode and a second treatment mode, and the source arrangement forms a first treatment region when in the first treatment mode; the source device forms a second treatment region when in a second treatment mode; the first treatment region is non-overlapping with the second treatment region.
In one embodiment, the source arrangement forms a first treatment beam centerline when in the first treatment mode; forming a second treatment beam centerline when the source device is in a second treatment mode; at least one of the first treatment beam centerline and/or the second treatment beam centerline is non-coplanar with an imaging beam centerline of the imaging device.
In one embodiment, the first treatment beam centerline and/or the second treatment beam centerline is non-coplanar with a cross-section of the imaging beam centerline of the imaging device in a left-right direction of the patient.
In one embodiment, the source arrangement is used for treating the head of the patient in a first treatment mode, and the imaging region of the imaging device at least partially overlaps the head of the patient; or, when the source device is in the second treatment mode, the source device is used for treating the body of the patient, and the imaging area of the imaging device is at least partially overlapped with the body of the patient.
In one embodiment, the imaging region of the imaging device covers the target area of the patient.
In one embodiment, the imaging region of the imaging device does not overlap or at least partially overlaps the treatment region of the source arrangement.
In one embodiment, the source arrangement forms a first treatment region when in the first treatment mode, and the imaging region of the imaging device at least partially overlaps the first treatment region; or when the radiotherapy system is in a second treatment mode, a second treatment region is formed, and the imaging region of the imaging device is at least partially overlapped with the second treatment region.
In one embodiment, the imaging device is mounted on the frame; or the imaging device is independently installed in the treatment room through a fixing device.
In one embodiment, the imaging area of the imaging device is adjustable.
In one embodiment, the imaging device comprises a ray emitting device and a ray receiving device, and the ray generated by the ray emitting device is received by the ray receiving device; the ray emitting device and/or the ray receiving device can move and/or rotate.
In one embodiment, the radiation emitting device or the radiation receiving device is mounted on the frame and can move and/or rotate relative to the frame.
In one embodiment, a guide rail is arranged on the rack, and the ray transmitting device or the ray receiving device can move relative to the rack along the guide rail.
In one embodiment, the radiation emitting device or the radiation receiving device is fixed with the frame through a fixing mechanism, and the radiation emitting device or the radiation receiving device moves and/or rotates relative to the fixing mechanism.
In one embodiment, the securing mechanism is movable and/or rotatable relative to the frame.
In one embodiment, the ray emitting device and/or the ray receiving device move in at least one of the head and foot direction of the patient, the left and right direction of the patient and the up and down direction of the patient.
In one embodiment, the ray emitting device is arranged on the first rotating mechanism and can rotate around the first rotating shaft; and/or the ray receiving device is arranged on the second rotating mechanism and can rotate around the second rotating shaft.
In one embodiment, an imaging beam centerline of the imaging device intersects a treatment beam centerline of the source arrangement.
In one embodiment, the imaging beam centerline of the imaging device is perpendicular to the treatment beam centerline of the source arrangement.
In one embodiment, the ray emitting device and the ray receiving device are positioned on two sides of the treatment area along the head and foot direction of the patient.
In one embodiment, in the head-foot direction of the patient, the ray emitting device is positioned on the head-direction side of the treatment area, and the ray receiving device is positioned on the foot-direction side of the treatment area.
In one embodiment, in the head and foot direction of the patient, the ray emitting device is positioned on the foot direction side of the treatment area, and the ray receiving device is positioned on the head direction side of the treatment area.
In one embodiment, the imaging device comprises at least one ray emitting device and at least one ray receiving device.
In one embodiment, the imaging device comprises two ray emitting devices and two ray receiving devices, and the two ray emitting devices and the two ray receiving devices are in cross imaging.
In one embodiment, the intersection angle of the intersection image is not 90 °.
In one embodiment, the imaging device is disposed on the source arrangement and is flipped synchronously with the source arrangement to image a portion of the patient's body when the source arrangement is in different operating positions.
In one embodiment, the projection of the beam center emitted by the ray generating device of the imaging equipment on the ray receiving device is deviated from the imaging center of the ray receiving device.
Compared with the prior art, the radiotherapy system provided by the embodiment of the application can be switched between different working positions by turning the radiation source device arranged on the machine frame. When the radiotherapy system of the embodiment is used, the imaging device can be used for determining the position relation between the region to be irradiated of the patient and the treatment region of the radiotherapy system. And then the positioning is carried out according to the position relation, so that the positioning precision is higher, the effect of ray irradiation is more ideal, and the damage to other areas of the patient is avoided.
The details of one or more embodiments of the application are set forth in the accompanying drawings and the description below to provide a more thorough understanding of the application.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
figure 1 is a front view of a radiotherapy system provided in accordance with an embodiment of the present application;
figure 2 is a side view of a radiotherapy system provided in accordance with an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments provided in the present application without any inventive step are within the scope of protection of the present application.
It is obvious that the drawings in the following description are only examples or embodiments of the present application, and that it is also possible for a person skilled in the art to apply the present application to other similar contexts on the basis of these drawings without inventive effort. Moreover, it should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of ordinary skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments without conflict.
Unless defined otherwise, technical or scientific terms referred to herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which this application belongs. Reference to "a," "an," "the," and similar words throughout this application are not to be construed as limiting in number, and may refer to the singular or the plural. The present application is directed to the use of the terms "including," "comprising," "having," and any variations thereof, which are intended to cover non-exclusive inclusions; for example, a process, method, system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to the listed steps or elements, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Reference to "connected," "coupled," and the like in this application is not intended to be limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The term "plurality" as referred to herein means two or more. "and/or" describes an association relationship of associated objects, meaning that three relationships may exist, for example, "A and/or B" may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. Reference herein to the terms "first," "second," "third," and the like, are merely to distinguish similar objects and do not denote a particular ordering for the objects.
As shown in fig. 1-2, an embodiment of the present application provides a radiotherapy system, including: a gantry 100, a source apparatus 200, and an imaging device 300; the source device 200 is arranged on the frame 100; the radiation source device 200 is used for carrying out the ray irradiation treatment on the patient, and the radiation source device 200 is switched among different working positions through overturning, and the different working positions correspond to a plurality of treatment modes. For example, two modes can be realized, the patient is treated under different treatment modes, and for example, the head of the patient can be treated before and after overturning; alternatively, the patient's body may be treated both before and after inversion. The present embodiment exemplifies a case where the radiation source device is turned over to form a first treatment mode and a second treatment mode, the first treatment mode being a head treatment mode, and the second treatment mode being a body treatment mode. The imaging device 300 is used to image a portion of a patient's body.
In the radiotherapy system provided by the embodiment of the present invention, the gantry 100 is used for carrying the radiation source device 200, and may be a frame-shaped gantry, a semicircular gantry, or the like. Illustratively, the gantry 100 of the radiotherapy system is a frame-shaped gantry that includes at least four uprights and two cross-members. One end of each of the four stand columns is fixed on the ground or a base of the radiotherapy system, the four stand columns form a rectangle at the positions, and the top ends of the two stand columns forming the short sides of the rectangle are provided with cross beams.
The radiation source device 200 is used for emitting radiation rays to perform radiation therapy on a patient, the rays can be gamma rays, X rays, electron beams, proton beams and other particle beams, the structure and the type of the radiation source device 200 are not limited in the application, and the description and the embodiments take a gamma knife for emitting the gamma rays as an example for illustration.
The gamma knife is the main treatment means of stereotactic radiosurgery, and is characterized by that according to the stereotactic principle, the pathological change tissue in the body is defined as target point, cobalt 60 is used as radioactive source, and the gamma ray is produced, and the gamma ray can be used for making disposable large-dose focusing irradiation to make the cell of the pathological change tissue necrotize so as to attain the goal of treatment.
The gamma knife is divided into a body gamma knife and a head gamma knife, and the body gamma knife is gamma knife equipment aiming at body lesions of patients as the name suggests; the head gamma knife is a gamma knife device aiming at the head focus of a patient. That is, the current gamma knife device, can only be used for a single head or body. In order to enable a gamma knife device to meet the treatment requirements of a head part and a body part at the same time, the embodiment of the application provides a radiotherapy system. The radiotherapy system can meet the treatment requirements of the head and the body.
Illustratively, the radiation source device 200 is mounted on the frame 100, and the radiation source device 200 further includes a turning mechanism for turning the radiation source device 200 to different working positions corresponding to a plurality of treatment modes. The present embodiment exemplifies a case where the radiation source device is turned over to form a first treatment mode and a second treatment mode, the first treatment mode being a head treatment mode, and the second treatment mode being a body treatment mode. When the target area is on the body of the patient, the turning mechanism turns the radiation source device 200 to a horizontal state, namely, the radiotherapy system is in a body treatment mode at the moment, and performs ray irradiation treatment on the target area of the patient; when the target area is on the head of the patient, the turning mechanism turns the radiation source device 200 to generate an inclination angle with the horizontal state, namely, the radiotherapy system is in a head treatment mode at the moment, and performs the ray irradiation treatment on the target area of the patient. The treatment centers of source device 200 are not limited in the embodiment of the present application, and the treatment centers may be overlapped or not overlapped before and after flipping.
The radiotherapy system provided by the embodiment of the application further comprises an imaging device 300, wherein the imaging device 300 can perform auxiliary positioning in a positioning stage; real-time imaging can also be performed during the treatment phase to assist in improving treatment accuracy. For example, the imaging device 300 may be mounted on the gantry 100, or may be mounted in the treatment room by a fixing device, so that the imaging beam of the imaging device 300 can reach a designated position. The imaging device 300 may be an infrared imaging device, a visible light imaging device, an X-ray imaging device, a magnetic resonance device, an ultrasound imaging device, a nuclear medicine imaging device (PET, SPECT), or the like. For example, the fixing device may be a screw, a buckle, etc. and the imaging device 300 may be fixed on a wall of the treatment room by the fixing device, or may be fixed on a top surface or a bottom surface of the treatment room. The fixing device may also be a bracket, through which the image device 300 is fixed around the rack 100, and the bracket may be fixed with the rack 100 or fixed on the ground. Before the radiotherapy system is used, a patient lies on the treatment couch 400, and after the image of the patient is collected by the imaging device 300, the patient is positioned by the collected image to ensure that the target point of the patient is aligned with the treatment isocenter of the radiotherapy system. When the radiotherapy system irradiates the target of the patient, the imaging device 300 can image the patient in real time, so that the treatment isocenter position of the target and the radiotherapy system is determined in real time, and the treatment precision is improved in an auxiliary manner.
By way of example, embodiments of the present application may also include a treatment couch for carrying a patient. The patient is moved to the treatment area for treatment by the movement of the treatment couch. Wherein, the patient lies on the treatment bed and enters the treatment area in a head-advanced mode, and the head and feet direction of the patient is the Y direction of the radiotherapy system; the left and right directions of the patient are the X directions of the radiotherapy system; the direction perpendicular to both the X direction and the Y direction is the Z direction of the radiotherapy system.
The radiotherapy system provided by the embodiment of the present application, by disposing the radiation source device 200 on the machine frame 100, the radiation source device 200 can be in different working positions by being turned over, and the different working positions correspond to multiple treatment modes, so as to perform treatment under the multiple treatment modes. The radiotherapy system is further equipped with an imaging device 300, and when the radiotherapy system of the applied embodiment is used, the imaging device 300 can be used for determining the position relationship between the region to be irradiated of the patient and the treatment region of the radiotherapy system. And then tumor tracking in the positioning or treatment process is carried out according to the position relation, so that the treatment precision is ensured, the effect of ray irradiation is further more ideal, and additional damage to other areas of the patient is avoided.
In one embodiment, the imaging beam centerline of imaging device 300 is non-coplanar with the treatment beam centerline of source arrangement 200.
In the embodiment of the present application, the imaging device 300 is exemplified as an X-ray imaging device. In the embodiment and the drawings of the present application, for example, the X-ray imaging apparatus includes two ray emitting devices 310 and two ray receiving devices 320, for example, the ray emitting devices 310 emit cone-beam X-rays, and the ray receiving devices 320 receive the cone-beam X-rays passing through the body of the patient to image the body of the patient. In the embodiment of the present application, a beam center of the cone beam emitted by the ray emitting device 310 is an imaging center line of the imaging apparatus 300. The radiation source device 200 takes cobalt 60 as an example of a radiation source, and when the radiation source device 200 is in an open state, rays emitted by a plurality of cobalt 60 sources are focused to form a focusing center. The radiation from the multiple cobalt 60 sources forms a focused beam whose centerline is the centerline of the treatment beam of source arrangement 200. The imaging beam centerline is neither intersected nor parallel with the treatment beam centerline. The imaging beam centerline is non-coplanar with the treatment beam centerline throughout the spatial region.
In one embodiment, the source arrangement is flipped over to form a first treatment mode and a second treatment mode, and the source arrangement 200 forms a first treatment region when in the first treatment mode; forming a second treatment region when the source arrangement 200 is in the second treatment mode; the first treatment area and the second treatment area may or may not overlap. The embodiment of the present application exemplifies a non-overlapping case, and the overlapping case may refer to the embodiment.
Illustratively, as shown in fig. 2, the first treatment mode is a head treatment mode and the second treatment mode is a body treatment mode. The radiation source device 200 is driven by the turnover mechanism to realize the switching of the head treatment mode and the body treatment mode. When the source assembly 200 is in the head treatment mode, the radiation from the plurality of cobalt 60 sources is focused in a region, i.e., the first treatment region O2First treatment region O2May be a spheroidal region. Only the first treatment region O needs to be satisfied2Can be used for irradiating the head tumor region. When the radiation source assembly 200 is in the body mode, the radiation emitted by the plurality of cobalt 60 sources is focused in a region, i.e., the second treatment region O1Second treatment region O1May be a spheroidal region. First treatment region O of head treatment mode2And a second treatment region O of the body treatment mode1Do not overlap with each other.
In one embodiment, source arrangement 200 forms a first treatment beam centerline when in the first treatment mode; forming a second treatment beam centerline when the source apparatus 200 is in the second treatment mode; at least one of the first treatment beam centerline and/or the second treatment beam centerline is non-coplanar with the imaging beam centerline of the imaging device 300.
Illustratively, the first treatment mode is a head treatment mode and the second treatment mode is a body treatment mode. When the source device 200 is in the head treatment mode, the rays emitted by the multiple cobalt 60 sources form a first treatment beam, the first treatment beam is focused in a region, and the central line of the light path formed by the first treatment beam is the central line of the first treatment beam. When the source device 200 is in the body treatment mode, the rays emitted by the multiple cobalt 60 sources form a second treatment beam, the second treatment beam is focused in a region, and the central line of the optical path formed by the second treatment beam is the central line of the second treatment beam. In the present embodiment, the center line of the first treatment beam and the center line of the imaging beam of the imaging apparatus 300 are not intersected or parallel, i.e. the center line of the imaging beam and the center line of the first treatment beam are not coplanar in the whole spatial region. Alternatively, the centerline of the second treatment beam is not parallel to the centerline of the imaging beam of the imaging device 300, i.e., the centerline of the imaging beam is not coplanar with the centerline of the second treatment beam over the entire spatial region. Alternatively, the center line of the first therapeutic beam and the center line of the second therapeutic beam are both not intersected or parallel with the center line of the imaging beam of the imaging apparatus 300, i.e. the center lines of the imaging beam are not coplanar with the center lines of the first therapeutic beam and the second therapeutic beam respectively in the whole space region.
Illustratively, as shown in Figs. 1-2, in a radiation therapy system, an XZ plane K of a first treatment region2XZ plane K of the second treatment zone1And an XZ plane K passing through the center line of the imaging beam3Are not coplanar.
In one embodiment, the first treatment beam centerline and/or the second treatment beam centerline is non-coplanar with a cross-section of the imaging beam centerline of the imaging device 300 in the left-right direction of the patient.
Illustratively, the centerline of the first treatment beam forms a cross-section, i.e., a first plane, of the first treatment beam in the left-right direction of the patient. The centerline of the second treatment beam forms a transverse plane, i.e., a second plane, of the second treatment beam in the left-right direction of the patient. The centerline of the imaging beam of the imaging device 300 forms a cross-section of the imaging beam in the left-right direction of the patient, i.e., the third plane. In this embodiment, the first plane is non-coplanar with the third plane. Alternatively, the second plane is non-coplanar with the third plane. Alternatively, the first plane and the second plane are both non-coplanar with the third plane.
In one embodiment, source arrangement 200 is configured to treat a patient's head while in a first treatment mode, with the imaging region of imaging device 300 at least partially overlapping the patient's head; alternatively, source arrangement 200 is configured to treat a patient's body while in the second treatment mode, and the imaging region of imaging device 300 at least partially overlaps the patient's body.
Illustratively, as shown in fig. 1-2, the first treatment mode is a head treatment mode, the first treatment mode being for treating a head of a patient; the second treatment mode is a body treatment mode, and the second treatment mode is used for treating the body of the patient. When source arrangement 200 is in the head treatment mode, the imaging region formed by the generated imaging beam of imaging device 300 covers at least a partial region of the patient's head. For example, the imaging region of the imaging device 300 covers the entire head of the patient, and the entire head of the patient is imaged to assist the positioning during the positioning stage, so that the positioning can be performed in real time during the treatment stage. The imaging region of the imaging device 300 may also cover a partial region of the patient's head, generating at least a partial image of the patient's head, which may assist in positioning during the setup phase, or may be positioned in real time during the treatment phase. When the radiation device is in the body mode, the imaging area formed by the generated imaging beam of the imaging device 300 covers at least a partial area of the body of the patient. For example, the imaging region of the imaging device 300 may cover a partial region of the patient's body, generate at least a partial image of the patient's body, assist in positioning during the positioning phase, or perform real-time positioning during the treatment phase. In the head treatment or body treatment mode, the partial image of the patient generated may or may not cover the target region.
In one embodiment, the imaging region of the imaging device 300 covers a target area of a patient.
Illustratively, prior to radiotherapy using a modality radiotherapy system, a target volume delineation of the patient is first required. Wherein, when the target area is sketched, can draw three profile at least: solid tumor volume (GTV), Clinical Target Volume (CTV), and Planning Target Volume (PTV). Wherein, the solid tumor volume (GTV) is a solid tumor region, i.e. a tumor region that can be observed by imaging with an imaging device; clinical Target Volume (CTV) is an increase in subclinical lesions based on solid tumor volume (GTV); planning a target volume (PTV) is to increase the safety margin on the basis of the Clinical Target Volume (CTV). The target volume described in this embodiment may be any of a solid tumor volume (GTV), a Clinical Target Volume (CTV), and a Planning Target Volume (PTV), and only needs to include a solid tumor.
In one embodiment, the imaging region of imaging device 300 does not overlap or at least partially overlaps the treatment region of source arrangement 200.
Illustratively, when the imaging region of the imaging device 300 does not overlap or at least partially overlaps the treatment region of the source arrangement 200, the positional relationship between the imaging region and the treatment region needs to be predetermined. When the patient needs to be positioned by the imaging device 300, the patient is moved to the imaging area by the treatment couch 400, the target position is determined in the imaging area, and the target position is moved to the treatment area by the treatment couch 400 according to the position relationship between the imaging area and the treatment area, so that the positioning is completed. When the imaging region of the imaging apparatus 300 completely overlaps the treatment region of the source arrangement 200, the patient is first moved to the imaging region, i.e. the treatment region, by the couch 400 and positioned within the treatment region by the imaging apparatus 300 when positioning by the imaging apparatus 300 is required. Real-time positioning by the imaging device 300 can also be performed during the treatment phase when the imaging area of the imaging device 300 at least partially overlaps the treatment area of the source arrangement 200.
By way of example, as shown in the figure1-2, when the imaging area of the imaging device 300 does not overlap the treatment area of the source arrangement 200, the imaging area O of the imaging device 3003(ii) a A first treatment region O formed when the source assembly 200 is in the head treatment mode2(ii) a A second treatment region O formed when the source assembly 200 is in the body treatment mode1. That is, the imaging area O3Does not cover the first treatment area O2Nor does it cover the second treatment area O1。
In one embodiment, the source arrangement 200 forms a first treatment region when in the first treatment mode, and the imaging region of the imaging device 300 at least partially overlaps the first treatment region; alternatively, when source arrangement 200 is in the second treatment mode, a second treatment region is formed, and the imaging region of imaging device 300 at least partially overlaps the second treatment region.
Illustratively, the first treatment mode is a head treatment mode and the second treatment mode is a body treatment mode. When source arrangement 200 is in a head treatment mode, the radiation from the plurality of cobalt 60 sources is focused in a region, i.e., the first treatment region. When the imaging region of the imaging device 300 partially overlaps the first treatment region, the positional relationship between the imaging region and the first treatment region needs to be determined in advance. When the patient needs to be positioned by the imaging device 300, the patient is moved to the imaging region by the treatment couch 400, the target position is determined in the imaging region, and the target position is moved to the first treatment region by the treatment couch 400 according to the position relationship between the imaging region and the first treatment region, thereby completing the positioning. When the imaging region of the imaging device 300 completely overlaps the first treatment region, when the patient needs to be positioned by the imaging device 300, the patient is first moved to the imaging region, i.e., the first treatment region, by the couch 400 and positioned in the first treatment region by the imaging device 300. The real-time positioning by the imaging device 300 can also be performed during the treatment phase when the imaging region of the imaging device 300 at least partially overlaps the first treatment region.
When the source arrangement 200 is in the body mode, the radiation from the plurality of cobalt 60 sources is focused in a region, i.e., the second treatment region. When the imaging region of the imaging device 300 partially overlaps the second treatment region, the positional relationship between the imaging region and the second treatment region needs to be determined in advance. When the patient needs to be positioned by the imaging device 300, the patient is moved to the imaging region by the treatment couch 400, the target position is determined in the imaging region, and the target position is moved to the second treatment region by the treatment couch 400 according to the position relationship between the imaging region and the second treatment region, thereby completing the positioning. When the imaging region of the imaging device 300 completely overlaps the second treatment region, when the patient needs to be positioned by the imaging device 300, the patient is first moved to the imaging region, i.e., the second treatment region, by the couch 400 and positioned in the second treatment region by the imaging device 300. When the imaging region of the imaging device 300 at least partially overlaps the second treatment region, real-time positioning by the imaging device 300 can also be performed during the treatment phase.
In one embodiment, the imaging area of the imaging device 300 is adjustable.
Illustratively, the imaging area of the imaging device 300 may be adjusted by moving or rotating. For example, the imaging device 300 is fixed to the gantry 100 by a slide rail or is independently installed in the treatment room, and the imaging area of the imaging device 300 is adjusted by moving the imaging device 300 on the slide rail. For example, the imaging device 300 may be fixed to the gantry 100 by a turntable having a rotating shaft or may be separately installed in the treatment room, and the imaging area of the imaging device 300 may be adjusted by rotating the imaging device 300 around the rotating shaft. The imaging device 300 may be disposed on a turntable of a rotating shaft, and the turntable may be fixed to the frame 100 by a slide rail or may be independently installed in the treatment room, so that the imaging device can move and rotate.
In one embodiment, the imaging device 300 includes a ray emitting device 310 and a ray receiving device 320, wherein the ray generated by the ray emitting device 310 is received by the ray receiving device 320; the radiation emitting device 310 and/or the radiation receiving device 320 may be movable and/or rotatable.
Illustratively, the radiation emitting device 310 may be: bulbs, accelerators, radioisotopes, and the like; the ray receiving device 320 may be: detectors, etc. any device capable of receiving radiation. When the imaging device 300 is an X-ray imaging device, the radiation emitting device 310 of the imaging device 300 may be a bulb, and the radiation receiving device 320 may be a detector. The radiation generated by the radiation emitting device 310 is received by the detector after being attenuated by passing through the patient, and an image of the patient is generated according to the signal received by the detector. Wherein, the ray emitting device 310 can move; the radiation emitting device 310 may also be rotated; the radiation emitting device 310 can be moved or rotated. Meanwhile, the detector can move; the detector can also rotate; the detector can also be moved and rotated. It is only necessary that the radiation emitting device 310 and the radiation receiving device 320 are opposite to each other. The moving and rotating modes can be realized by the sliding rail and the turntable.
In one embodiment, the radiation emitting device 310 or the radiation receiving device 320 is mounted on the gantry 100 and can move and/or rotate relative to the gantry 100.
Illustratively, the radiation emitting device 310 is mounted on the gantry 100, and the radiation receiving device 320 opposite thereto may be mounted on the gantry 100 or may be separately mounted in the treatment room. It is understood that the radiation receiving device 320 may be disposed on the gantry 100, and the radiation emitting device 310 opposite thereto may be installed on the gantry 100 or separately installed in the treatment room. When the radiation emitting device 310 is mounted on the gantry 100, it can move or rotate or both on the gantry 100 by means of the above-mentioned slide rail and the turntable. When the radiation receiving device 320 is mounted on the gantry 100, the radiation receiving device can also be moved or rotated or both moved and rotated on the gantry 100 by means of the above-mentioned slide rail and the turntable. It is only necessary that the radiation emitting device 310 and the radiation receiving device 320 are opposite to each other.
In one embodiment, the gantry 100 is provided with a guide rail, and the radiation emitting device 310 or the radiation receiving device 320 can move along the guide rail relative to the gantry 100.
Illustratively, the gantry 100 includes a vertical column and a horizontal beam, and a fixed beam is disposed between the two horizontal beams to better ensure the stability of the radiotherapy system. In this embodiment, a slide rail may be disposed on the rack 100, and the radiation emitting device 310 or the radiation receiving device 320 may be disposed on the slide rail and move on the rack 100 through the slide rail. The rack 100 may also be provided with a slide rail, the slide rail is provided with a slide block, and the radiation emitting device 310 or the radiation receiving device 320 is fixed on the slide block and moves on the rack 100 through the slide block. It is understood that a slide rail may be disposed on the cross beam to ensure that the radiation emitting device 310 or the radiation receiving device 320 moves in the head and foot direction of the patient; the slide rail can also be arranged on the upright post to ensure that the ray emitting device 310 or the ray receiving device 320 moves up and down on the patient; the slide rail may be further provided on the fixing beam to ensure that the radiation emitting device 310 or the radiation receiving device 320 moves in the left and right directions of the patient. It is understood that at least two of the vertical column, the horizontal beam and the fixed beam may be provided with a slide rail to move the radiation emitting device 310 or the radiation receiving device 320 in two directions or in three directions. For example, the radiation emitting device 310 may be separately disposed on the guide rail, and the radiation receiving device 320 may be relatively fixed; the ray receiving device 320 can be arranged on the guide rail independently, and the ray emitting device 310 is relatively fixed; it is also possible that the radiation emitting device 310 and the radiation receiving device 320 are both disposed on the guide rail. It is only necessary that the radiation emitting device 310 and the radiation receiving device 320 are opposite to each other.
In one embodiment, the radiation emitting device 310 or the radiation receiving device 320 is fixed to the gantry 100 by a fixing mechanism, and the radiation emitting device 310 or the radiation receiving device 320 moves and/or rotates relative to the fixing mechanism.
For example, the fixing mechanism may be a fixing plate, the fixing plate may cover the upright, the cross beam, and the fixing beam, a slide rail is disposed on the fixing plate, and the radiation emitting device 310 or the radiation receiving device 320 may move on the fixing plate to ensure that the radiation emitting device 310 and/or the radiation receiving device 320 moves in at least one of a head and foot direction of the patient, a left and right direction of the patient, and an up and down direction of the patient. That is, the individual ray emitting devices 310 can be ensured to move in the above three directions; it is also possible to ensure that the individual ray receiving devices 320 move in the above three directions; it is also possible to ensure that the radiation emitting device 310 and the radiation receiving device 320 are both moved in the above-mentioned three directions. The fixing plate may be a short plate with a length within a certain range, and is disposed on the cross beam, and a slide rail is disposed on the fixing plate, and the radiation emitting device 310 or the radiation receiving device 320 moves on the slide rail. It is only necessary that the radiation emitting device 310 and the radiation receiving device 320 are opposite to each other. Illustratively, the radiation emitting device 310 or the radiation receiving device 320 is fixed to the fixing plate by a turntable having a rotation shaft, so that the radiation emitting device 310 or the radiation receiving device can rotate around the rotation shaft.
In one embodiment, the securing mechanism may move and/or rotate relative to the frame 100.
For example, when the fixing mechanism is a short plate having a length within a certain range, a slide rail may be disposed on the rack 100, and the fixing mechanism may be disposed on the slide rail and moved on the rack 100 by the slide rail. The sliding rail can be arranged on the cross beam to ensure that the fixing mechanism moves in the head and foot directions of the patient; the slide rail can also be arranged on the upright post to ensure that the fixing mechanism moves up and down on the patient; the slide rail can also be arranged on the fixed beam to ensure that the fixing mechanism moves in the left and right directions of the patient. It will be appreciated that slide rails may be provided on at least two of the uprights, cross-members and fixed beams to enable the fixing mechanism to move in two directions, or in three directions. The fixing mechanism is fixed to the chute by a turntable having a rotating shaft, for example, so that the fixing mechanism can rotate around the rotating shaft.
In one embodiment, the radiation emitting device 310 is disposed on the first rotating mechanism and can rotate around a first rotating shaft; and/or the ray receiving device 320 is arranged on the second rotating mechanism and can rotate around the second rotating shaft.
Illustratively, the first rotating mechanism includes a first rotating shaft, the radiation emitting device 310 is disposed on the first rotating mechanism and can rotate around the first rotating shaft, the first rotating mechanism can be disposed on the gantry 100, and the first rotating mechanism can also be independently fixed in the treatment room. The second rotating mechanism includes a second rotating shaft, the ray receiving device 320 is disposed on the second rotating mechanism and can rotate around the second rotating shaft, the second rotating mechanism can be disposed on the rack 100, and the second rotating mechanism can also be independently fixed in the treatment room. It is only necessary that the radiation emitting device 310 and the radiation receiving device 320 are opposite to each other. Wherein, only the ray transmitting device 310 can be arranged on the first rotating mechanism, and the opposite ray receiving device 320 can not rotate; it is also possible to arrange only the radiation receiving device 320 on the second rotation mechanism, the opposite radiation receiving device 320 not being able to rotate; it is also possible to simultaneously arrange the radiation emitting device 310 on the first rotating mechanism and the radiation receiving device 320 on the second rotating mechanism.
In one embodiment, the imaging beam centerline of imaging device 300 intersects the treatment beam centerline of source arrangement 200.
Illustratively, when source apparatus 200 is in a head treatment mode, source apparatus 200 forms a first treatment beam centerline; when the source device 200 is in the body treatment mode, the source device 200 forms a second treatment beam centerline. The imaging beam centerline of the imaging device 300 forms an angle with the first treatment beam centerline; or the imaging beam center line of the imaging device 300 forms an included angle with the second treatment beam center line; or the imaging beam centerline of the imaging device 300 is at an angle to both the first treatment beam centerline and the second treatment beam centerline. Preferably, the imaging beam centerline of imaging device 300 is perpendicular to the treatment beam centerline of source arrangement 200. I.e., the imaging beam centerline of the imaging device 300 is parallel to the horizontal plane and perpendicular to the treatment beam centerline of the source apparatus 200, i.e., perpendicular to the first treatment beam centerline; or perpendicular to the second treatment beam centerline; or perpendicular to the first and second treatment beam centerlines, respectively.
In one embodiment, the radiation emitting device 310 and the radiation receiving device 320 are located on both sides of the treatment region along the head and foot direction of the patient.
Illustratively, the source arrangement 200 forms a first treatment region when in the head treatment mode. The source arrangement 200 forms a second treatment region when in the body treatment mode. Or as an example, the ray emitting device 310 and the ray receiving device 320 are on both sides of the first treatment area or the second treatment area in the head and foot direction of the patient. In the head-foot direction of the patient, the radiation emitting device 310 is located on the head-direction side of the treatment region, and the radiation receiving device 320 is located on the foot-direction side of the treatment region. The ray emitting device 310 is positioned at one side of the foot direction of the treatment area, and the ray receiving device 320 is positioned at one side of the head direction of the treatment area. For example, based on the treatment region, the radiation emitting device 310 may be disposed in front of the treatment region, i.e., in the head direction, and the radiation receiving device 320 may be disposed in back of the treatment region, i.e., in the foot direction; it is also possible to arrange the radiation emitting device 310 at the rear of the treatment area, i.e. in the direction of the feet, and the radiation receiving device 320 at the front of the treatment area, i.e. in the direction of the head. It is only necessary to ensure that the radiation generated by the radiation emitting device 310 passes through the patient and is received by the radiation receiving device 320 when the patient is on the treatment couch 400. It is understood that, in the up-down direction of the patient, the radiation emitting device 310 may be disposed above the patient, and the radiation receiving device 320 may be disposed below the patient; the radiation emitting device 310 may be disposed below the patient, and the radiation receiving device 320 may be disposed above the patient.
In one embodiment, the radiation emitting device 310 and the radiation receiving device 320 are located on both sides of the treatment region in the left-right direction of the patient. Illustratively, the radiation emitting device 310 and the radiation receiving device 320 are disposed on the gantry 100 and on both sides of the patient in the left-right direction. Wherein, the ray emitting device 310 is arranged at the left side, and the ray receiving device 320 is arranged at the right side; alternatively, the radiation emitting device 310 may be disposed on the right side and the radiation receiving device 320 may be disposed on the left side.
In one embodiment, the imaging device 300 includes at least one radiation emitting device 310 and at least one radiation receiving device 320.
Illustratively, the imaging device 300 may include a set of ray emitting devices 310 and ray receiving devices 320. Preferably, the imaging device 300 includes two radiation emitting devices 310 and two radiation receiving devices 320. The two radiation emitting devices 310 and the two radiation receiving devices 320 are respectively disposed opposite to each other. For example: the first ray transmitting device is arranged opposite to the first ray receiving device; the second ray transmitting device is arranged opposite to the second ray receiving device.
In the direction of the patient's head and feet relative to the treatment region formed by source arrangement 200. The front of the treatment area, i.e. the head direction of the patient; the rear of the treatment area, i.e. the direction of the patient's foot. The first radiation emitting device, the first radiation receiving device, the second radiation emitting device and the second radiation receiving device may be arranged behind the treatment region. The first ray emitting device, the first ray receiving device, the second ray emitting device and the second ray receiving device can be arranged in front of the treatment area. The first ray emitting device is arranged in front of the treatment area, the first ray receiving device is arranged behind the treatment area, the second ray emitting device is arranged in front of the treatment area, and the second ray receiving device is arranged behind the treatment area. The first ray emitting device is arranged at the rear part of the treatment area, the first ray receiving device is arranged at the front part of the treatment area, the second ray emitting device is arranged at the rear part of the treatment area, and the second ray receiving device is arranged at the front part of the treatment area. The first ray emitting device is arranged in front of the treatment area, the first ray receiving device is arranged behind the treatment area, the second ray emitting device is arranged behind the treatment area, and the second ray receiving device is arranged in front of the treatment area. The first ray emitting device can be arranged at the rear part of the treatment area, the first ray receiving device can be arranged at the front part of the treatment area, the second ray emitting device can be arranged at the front part of the treatment area, and the second ray receiving device can be arranged at the rear part of the treatment area.
In the lateral direction of the patient with respect to the treatment region formed by the source device 200. To the left of the treatment area, i.e. to the left of the patient; to the right of the treatment area, i.e. to the right of the patient. The first radiation emitting device may be disposed to the right of the treatment region, the first radiation receiving device may be disposed to the left of the treatment region, the second radiation emitting device may be disposed to the right of the treatment region, and the second radiation receiving device may be disposed to the left of the treatment region. The first ray transmitting device can be arranged at the left of the treatment area, the first ray receiving device can be arranged at the right of the treatment area, the second ray transmitting device can be arranged at the left of the treatment area, and the second ray receiving device can be arranged at the right of the treatment area. The first ray emitting device can be arranged at the right of the treatment area, the first ray receiving device can be arranged at the left of the treatment area, the second ray emitting device can be arranged at the left of the treatment area, and the second ray receiving device can be arranged at the right of the treatment area. The first ray transmitting device can be arranged at the left of the treatment area, the first ray receiving device can be arranged at the right of the treatment area, the second ray transmitting device can be arranged at the right of the treatment area, and the second ray receiving device can be arranged at the left of the treatment area.
In the vertical direction of the patient with respect to the treatment region formed by the source device 200. Above the treatment area, i.e. in the upper direction of the patient; below the treatment area, i.e. in the direction of the lower part of the patient. The first radiation emitting device may be disposed above the treatment region, the first radiation receiving device may be disposed below the treatment region, the second radiation emitting device may be disposed above the treatment region, and the second radiation receiving device may be disposed below the treatment region. The first ray emitting device can be arranged below the treatment area, the first ray receiving device can be arranged above the treatment area, the second ray emitting device can be arranged below the treatment area, and the second ray receiving device can be arranged above the treatment area. The first ray emitting device can be arranged above the treatment area, the first ray receiving device can be arranged below the treatment area, the second ray emitting device can be arranged below the treatment area, and the second ray receiving device can be arranged above the treatment area. The first ray emitting device can be arranged below the treatment area, the first ray receiving device can be arranged above the treatment area, the second ray emitting device can be arranged above the treatment area, and the second ray receiving device can be arranged below the treatment area.
The arrangement in the above three directions can be freely combined, and only the intersection of the ray bundles of the two sets of ray receiving devices 320 and ray emitting devices 310 is required, and the intersected area can cover the patient on the treatment couch 400.
In one embodiment, the imaging device 300 includes two radiation emitting devices 310 and two radiation receiving devices 320, and the two radiation emitting devices 310 and the two radiation receiving devices 320 are cross-imaged. For example, the crossing angle of the two imaging beams in the crossing imaging may be 90 °, or the crossing angle may not be 90 °.
In one embodiment, the imaging device is mounted on the source assembly and is flipped synchronously with the source assembly to image a portion of the patient's body when the source assembly is in different operating positions.
For example, the imaging device may be arranged at the edge of the source arrangement, and the imaging device can be turned synchronously with the source arrangement when the source arrangement is turned in different working positions. Before and after the overturning, the position of the imaging device relative to the source device is unchanged, the position of the imaging area of the imaging device relative to the source device is unchanged, and the position of the imaging area of the imaging device relative to the treatment area of the source device is unchanged.
In one embodiment, the projection of the beam center emitted by the ray generating device of the imaging equipment on the ray receiving device is deviated from the imaging center of the ray receiving device.
For example, the ray beam emitted by the imaging device is projected on the surface of the ray receiving device, and the point formed by the central line of the ray beam on the surface of the ray receiving device is not the same point as the central point of the ray receiving device. That is, the area of the surface of the ray receiving device where the ray beam emitted by the imaging device is formed is not the central area of the ray receiving device.
The radiotherapy system provided by the embodiment of the application can realize a head treatment mode and a body treatment mode at the same time, and the imaging device is added to determine the position relation between the region to be irradiated of the patient and the radiation irradiation region of the radiotherapy system. And then the positioning is carried out according to the position relation, so that the positioning precision is higher, the effect of ray irradiation is more ideal, and the damage to other areas of the patient is avoided. When the radiotherapy system carries out treatment, can utilize image equipment to carry out real-time imaging to ensure the position accuracy of target region and ray irradiation region, and can detect the dose of bundle of rays in real time, in order to ensure the effect of treatment.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (27)
1. A radiotherapy system, characterized in that the radiotherapy system comprises: a frame, a radiation source device and an imaging device;
the radiation source device is arranged on the frame;
the radiation source device is used for carrying out radiation treatment on a patient and is switched among different working positions through overturning;
the imaging device is used for imaging a portion of a patient's body.
2. Radiotherapy system according to claim 1,
the imaging beam center line of the imaging device is not coplanar with the treatment beam center line of the radiation source device.
3. Radiotherapy system according to claim 1, characterized in that said source means forms a first treatment mode and a second treatment mode by flipping, and
the source arrangement forms a first treatment region when in a first treatment mode;
the source device forms a second treatment region when in a second treatment mode;
the first treatment region is non-overlapping with the second treatment region.
4. Radiotherapy system according to claim 3,
forming a first treatment beam centerline when the source device is in a first treatment mode;
forming a second treatment beam centerline when the source device is in a second treatment mode;
at least one of the first treatment beam centerline and/or the second treatment beam centerline is non-coplanar with an imaging beam centerline of the imaging device.
5. The radiotherapy system of claim 4, wherein the first treatment beam centerline and/or the second treatment beam centerline is non-coplanar with a cross-section of the imaging beam centerline of the imaging device in a left-right direction of the patient.
6. Radiotherapy system according to claim 1,
when the source device is in a first treatment mode, the source device is used for treating the head of the patient, and an imaging area of the imaging equipment is at least partially overlapped with the head of the patient; or the like, or, alternatively,
when the source device is in the second treatment mode, the source device is used for treating the body of the patient, and the imaging area of the imaging device at least partially overlaps with the body of the patient.
7. Radiotherapy system according to claim 6,
the imaging region of the imaging device covers the target area of the patient.
8. Radiotherapy system according to claim 1,
the imaging region of the imaging device does not overlap or at least partially overlaps the treatment region of the source arrangement.
9. Radiotherapy system according to claim 8,
when the source device is in a first treatment mode, a first treatment area is formed, and an imaging area of the imaging equipment at least partially overlaps with the first treatment area; or the like, or, alternatively,
when the radiotherapy system is in a second treatment mode, a second treatment area is formed, and the imaging area of the imaging device is at least partially overlapped with the second treatment area.
10. The radiotherapy system of claim 1, wherein the imaging device is mounted on the gantry; alternatively, the first and second electrodes may be,
the imaging device is independently installed in the treatment room through a fixing device.
11. Radiotherapy system according to claim 1,
the imaging area of the imaging device is adjustable.
12. Radiotherapy system according to claim 11,
the imaging equipment comprises a ray transmitting device and a ray receiving device, and rays generated by the ray transmitting device are received by the ray receiving device;
the ray emitting device and/or the ray receiving device can move and/or rotate.
13. Radiotherapy system according to claim 12, characterized in that the radiation emitting device or the radiation receiving device is mounted on the gantry and is movable and/or rotatable with respect to the gantry.
14. Radiotherapy system according to claim 13, characterized in that a guide rail is provided on the gantry, along which the radiation emitting device or the radiation receiving device is movable relative to the gantry.
15. Radiotherapy system according to claim 13, characterized in that the radiation emitting device or the radiation receiving device is fixed to the gantry by a fixing mechanism, relative to which the radiation emitting device or the radiation receiving device is moved and/or rotated.
16. The radiation therapy system of claim 15, wherein the fixation mechanism is movable and/or rotatable relative to the gantry.
17. Radiotherapy system according to claim 12,
the ray emitting device and/or the ray receiving device move in at least one direction of the head and feet direction of the patient, the left and right direction of the patient and the up and down direction of the patient.
18. Radiotherapy system according to claim 12,
the ray emission device is arranged on the first rotating mechanism and can rotate around the first rotating shaft; and/or
The ray receiving device is arranged on the second rotating mechanism and can rotate around the second rotating shaft.
19. Radiotherapy system according to claim 1,
the imaging beam center line of the imaging device is intersected with the treatment beam center line of the radiation source device.
20. Radiotherapy system according to claim 1,
the imaging beam center line of the imaging device is perpendicular to the treatment beam center line of the radiation source device.
21. Radiotherapy system according to claim 1,
the ray emitting device and the ray receiving device are positioned on two sides of the treatment area along the head and foot direction of the patient.
22. Radiotherapy system according to claim 21,
in the head and foot direction of the patient, the ray emitting device is positioned at one side of the head direction of the treatment area, the ray receiving device is positioned at one side of the foot direction of the treatment area, or,
in the head and foot direction of the patient, the ray emitting device is positioned on one side of the foot direction of the treatment area, and the ray receiving device is positioned on one side of the head direction of the treatment area.
23. Radiotherapy system according to claim 1,
the imaging device comprises at least one ray emitting device and at least one ray receiving device.
24. Radiotherapy system according to claim 23,
the imaging equipment comprises two ray transmitting devices and two ray receiving devices, and the two ray transmitting devices and the two ray receiving devices are in cross imaging.
25. Radiotherapy system according to claim 24,
the cross angle of the cross imaging is not 90 deg..
26. Radiotherapy system according to claim 1,
the imaging equipment is arranged on the radiation source device and synchronously overturns along with the radiation source device so as to image the part of the body of the patient when the radiation source device is in different working positions.
27. Radiotherapy system according to claim 1, characterized in that the projection of the center of the beam from the radiation generating means of the imaging device on the radiation receiving means is offset from the imaging center of the radiation receiving means.
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| CN202023350437.8U CN215691126U (en) | 2020-12-31 | 2020-12-31 | Radiotherapy system |
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