CN110201314B - Radiotherapy device - Google Patents
Radiotherapy device Download PDFInfo
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- CN110201314B CN110201314B CN201910401631.7A CN201910401631A CN110201314B CN 110201314 B CN110201314 B CN 110201314B CN 201910401631 A CN201910401631 A CN 201910401631A CN 110201314 B CN110201314 B CN 110201314B
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- hollow structure
- axial direction
- treatment
- drive
- assembly
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1077—Beam delivery systems
- A61N5/1081—Rotating beam systems with a specific mechanical construction, e.g. gantries
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N2005/1092—Details
- A61N2005/1097—Means for immobilizing the patient
Abstract
The present invention provides a radiotherapy apparatus comprising: a frame, wherein a hollow structure is formed in the middle of the frame; the treatment bed comprises a bed plate which can move into or out of the frame and can rotate around a preset axial direction; the treatment assembly is arranged in the hollow structure and comprises a treatment head which can move along the axial direction of the hollow structure and can rotate around the axial direction of the hollow structure; the radiotherapy device comprises a first state and a second state, wherein in the first state, at least part of the bed plate moves into the rack, and the treatment head moves into the rack so as to perform radiotherapy on a patient positioned on the bed plate; when the patient is in the second state, the bed plate moves to the outside of the machine frame and rotates to the angle required by treatment along the preset axial direction, and the treatment head moves to the outside of the machine frame so as to perform radiotherapy on the patient positioned on the bed plate. Through setting up portable treatment head to the frame outside, both satisfied the treatment in-process and irradiated the demand to coplane, when also having satisfied non-coplane and shining, for realizing treatment table multi-angle rotating, the operator is to the demand in bigger space.
Description
Technical Field
The application relates to the technical field of radiotherapy, in particular to a radiotherapy device
Background
Radiotherapy, i.e., radiation therapy, may utilize ionizing radiation produced by radiation to kill tumor cells in a focal region of a subject. Radiotherapy is one of the important means for treating cancer, and more than half of tumor patients need to receive radiotherapy. Wherein the radiation is generated by a radiotherapy apparatus. X (gamma) rays, electron rays or proton rays are generally used to kill and damage tumor cells.
Conventional radiation therapy techniques fall into two broad categories, coplanar irradiation and non-coplanar irradiation. Coplanar illumination refers to the situation where the central axes of all illumination fields are distributed in the same plane, whereas non-coplanar illumination refers to the situation where one or more beam axes are not in the plane. Compared with coplanar irradiation, the non-coplanar irradiation is more three-dimensional, can realize multi-angle and multi-radian irradiation in a geometric space, increases the incidence direction of a visual field, is very favorable for protecting organs at risk, can improve the dose distribution condition in a target area, and can better realize single large-dose segmentation irradiation.
The traditional way is to use different radiotherapy devices to carry out coplanar irradiation treatment and non-coplanar irradiation treatment on a patient independently. However, this has the problem that a large space is required to accommodate these devices at the same time, and a large space is occupied. In addition, the patient needs to complete the treatment from one radiotherapy device and then transfer to another radiotherapy device, which takes longer treatment time.
Disclosure of Invention
The invention aims to provide a radiotherapy device.
The radiotherapy device comprises a rack, wherein a hollow structure is formed in the middle of the rack;
a treatment couch including a couch plate movable into and out of the gantry, the couch plate being rotatable about a predetermined axial direction;
the treatment assembly is arranged in the hollow structure and comprises a treatment head which can move along the axial direction of the hollow structure, the treatment head can move to the outside of the frame, and the treatment head can rotate around the axial direction of the hollow structure;
the radiotherapy device comprises a first state and a second state, when the radiotherapy device is in the first state, the bed plate is at least partially moved into the rack, and the treatment head is moved into the rack so as to perform radiotherapy on a patient positioned on the bed plate; when the radiotherapy device is in the second state, the bed plate moves to the outside of the rack and rotates to the angle required by treatment along the preset axial direction, and the treatment head moves to the outside of the rack so as to perform radiotherapy on a patient positioned on the bed plate.
Optionally, the radiotherapy device further comprises a base, the frame is connected with the base in a rotating mode, the frame can surround the axial direction of the hollow structure and is opposite to the base in a rotating mode, and the treatment assembly is arranged on the inner wall of the frame.
Optionally, the radiotherapy apparatus further comprises a rotary bearing, and an axial direction of the rotary bearing is parallel to an axial direction of the hollow structure; the swivel bearing includes the stiff end and with the stiff end rotates the expansion end of connecting, the stiff end with the base is connected, the expansion end with the frame is connected.
Optionally, the radiotherapy apparatus further comprises a driving device, wherein the driving device is arranged in the base and is used for driving the rack to rotate around the hollow structure in the axial direction.
Optionally, the driving device is a variable speed driving device, and the variable speed driving device can drive the frame to rotate at least two speeds.
Optionally, the variable speed drive comprises a first drive mode and a second drive mode;
when the treatment head moves into the machine frame, the variable-speed driving device is switched to a first driving mode, and the variable-speed driving device drives the machine frame to rotate at a first speed; when the treatment head moves out of the machine frame, the variable-speed driving device is switched to a second driving mode, the variable-speed driving device drives the machine frame to rotate at a second speed, and the second speed is smaller than the first speed.
Optionally, the variable speed driving device comprises a motor, a gear assembly, a sprocket assembly, a clutch device and a transmission shaft, and the transmission shaft is connected with the frame;
when the variable speed drive device is in a first drive mode, the clutch device switches the gear assembly to be connected with the motor and the transmission shaft, and the motor drives the gear assembly to rotate at the first speed; when the variable-speed driving device is in a second driving mode, the clutch device switches the chain wheel assembly to be connected with the motor and the transmission shaft, and the motor drives the chain wheel assembly to rotate at the second speed.
Optionally, the treatment assembly further includes a moving assembly, the moving assembly is disposed inside the frame, and the moving assembly is configured to implement axial movement of the treatment head along the hollow structure.
Optionally, the moving assembly includes a carrier and a guide rail, the guide rail is disposed on the inner wall of the frame along the axial direction of the hollow structure, the treatment head is disposed on the carrier, and the carrier is slidably connected to the guide rail so as to realize the axial movement of the treatment head along the hollow structure.
Optionally, the guide rail is a linear guide rail.
Optionally, the treatment head comprises a radiation source adapted to emit a radiation beam along a beam axis intersecting an axial direction of the hollow structure.
Optionally, the treatment couch comprises a rotating mechanism for driving the couch plate to rotate along a preset axial direction.
Optionally, the rotating mechanism comprises a revolution disc capable of rotating along the preset axial direction, and the bed plate is arranged on the revolution disc.
Optionally, the treatment bed includes a bed board supporting part, the lower end of the bed board supporting part is connected with the revolution plate, and the bed board is movably arranged above the bed board supporting part.
Optionally, the treatment couch comprises a translation mechanism for driving the bed plate to move in or out of the hollow structure along the axial direction of the hollow structure.
Optionally, the translation mechanism is a lead screw assembly, and the lead screw assembly includes: the screw rod and the screw thread are connected to the sleeve joint piece of the screw rod, the screw rod is arranged along the axial direction of the hollow structure, the sleeve joint piece is fixedly connected with the bed board, and the sleeve joint piece is driven by the screw rod to drive the bed board to move along the axial direction of the hollow structure.
Optionally, the translation mechanism is a rack and pinion assembly, the rack and pinion assembly comprising: gear spare and transmission connect in the rack spare of gear spare, the tooth condition is followed hollow structure's axial setting and with bed board fixed connection, the tooth condition is in drive under the drive of gear spare the bed board is followed hollow structure's axial displacement.
Optionally, the translation mechanism is a chain drive assembly, the chain drive assembly comprising: drive the tooth with around locating drive the chain of tooth, the chain is followed hollow structure's axial setting and with bed board fixed connection, the chain is in drive the drive of tooth drives down the bed board is followed hollow structure's axial displacement.
Optionally, the frame includes an inner ring and an outer ring sleeved outside the inner ring, and the middle part of the inner ring is formed with the hollow structure; the inner ring can rotate around the axial direction of the hollow structure relative to the outer ring, and the treatment head is arranged on the inner side of the inner ring.
The application provides a radiotherapy device, through setting up portable treatment head to the frame outside, the treatment head can satisfy the treatment demand that coplane shines when being located frame inside. When the treatment head moves to the outside of the frame, the treatment head is matched with a treatment bed capable of realizing multi-angle rotation, and the treatment requirement of non-coplanar irradiation can be met. Both satisfied the treatment in-process to the demand that coplane shines, when also having satisfied non-coplane and shining, the operator is to the demand in bigger space for realizing treatment couch multi-angle rotating to can be between two kinds of modes comparatively rapid switch over, with the application scene of adaptation difference, possess stronger practicality, improve treatment efficiency, reach better treatment.
Drawings
Fig. 1 is a schematic structural diagram of a radiotherapy apparatus according to an exemplary embodiment of the present invention in a use state.
Fig. 2 is a schematic structural diagram of a radiotherapy apparatus according to an exemplary embodiment of the present invention in another use state.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the terms "first," "second," and the like as used in the description and in the claims, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. Unless otherwise indicated, "front", "rear", "lower" and/or "upper" and the like are for convenience of description and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items.
A radiotherapy apparatus according to an exemplary embodiment of the present application will be described in detail below with reference to the accompanying drawings. The features of the following examples and embodiments can be supplemented or combined with each other without conflict.
Referring to fig. 1 and fig. 2, a radiotherapy apparatus 100 according to an embodiment of the present invention includes a frame 10, a treatment couch 20, and a treatment assembly 30 disposed on the frame 10.
The frame 10 has a hollow structure 11 formed in the middle, and in one embodiment, the hollow structure 11 is a hole with two open ends, and the cross section of the hollow structure 11 parallel to the open ends is circular. In other embodiments, the hollow structure 11 may be a hole with an open end, and the open end is disposed near one end of the treatment couch 20. In other embodiments, the cross-section of the hollow structure 11 parallel to the opening may also be oval or other shapes, which may be provided as the case may be.
The treatment couch 20 includes a couch plate 21, a translation mechanism, and a rotation mechanism. A translation mechanism may be used to drive the bed plate 21 in and out of the hollow structure 11 in the axial direction a of the hollow structure 11. The bed plate 21 can also rotate around the preset axial direction b, and the rotating mechanism is used for driving the bed plate 21 to rotate along the preset axial direction b. It should be noted that the preset axial direction b refers to a rotation angle and a direction that are regulated and controlled by an operator and set according to the advice of a doctor to achieve the best treatment effect in the process of non-coplanar irradiation radiotherapy.
In this embodiment, the bed plate 21 is a rectangular plate, the bed plate 21 includes two first side portions and two second side portions, the length of the first side portion is smaller than the length of the second side portion, the width of the first side portion of the bed plate 21 is smaller than the aperture of the hole of the hollow structure 11, the first side portion of the bed plate 21 is disposed toward the hole of the hollow structure 11, the bed plate 21 can be partially or completely moved into or out of the hollow structure 11 of the frame 10,
The radiotherapy device 100 comprises a first state and a second state, when the radiotherapy device 100 is in the first state, the bed plate 21 is at least partially moved into the rack 10, and the treatment head 31 is moved into the rack 10 to perform radiotherapy on the patient on the bed plate 21. When the radiotherapy device 100 is in the second state, the bed plate 21 moves to the outside of the gantry 10 and rotates along the preset axial direction b to the angle required for the treatment, and the treatment head 31 moves to the outside of the gantry 10 to perform radiotherapy on the patient on the bed plate 21.
The radiotherapy device that this application embodiment provided can satisfy the treatment demand that coplane shines when the treatment head is located the frame inside through setting up the treatment head that can remove to the frame outside. When the treatment head moves to the outside of the frame, the treatment head is matched with a treatment bed capable of realizing multi-angle rotation, and the treatment requirement of non-coplanar irradiation can be met. Both satisfied the treatment in-process to the demand that coplane shines, when also having satisfied non-coplane and shining, the operator is to the demand in bigger space for realizing treatment couch multi-angle rotating to can be between two kinds of modes comparatively rapid switch over, with the application scene of adaptation difference, possess stronger practicality, improve treatment efficiency, reach better treatment.
In an alternative embodiment, the translation mechanism may be a lead screw assembly, a rack and pinion assembly, a chain drive assembly, or the like. The rotary mechanism may be a screw type rotary mechanism, a cam type rotary mechanism, a crank type rotary mechanism, or the like. The following describes how the translation mechanism drives the bed plate 21 in and out of the hollow structure 11 along the axial direction a of the hollow structure 11. It should be noted that the implementation manner of the translation mechanism to move the bed plate 21 into or out of the hollow structure 11 along the axial direction a of the hollow structure 11 is not limited to the following.
(1) The first way of moving the bed plate 21 into or out of the hollow structure 11 along the axial direction a of the hollow structure 11 is driven by the translation mechanism: translation mechanism is lead screw assembly, and lead screw assembly includes: the screw rod, be used for driving screw rod pivoted motor and threaded connection in the cover joint piece of screw rod, the screw rod sets up along hollow structure 11's axial a, and cover joint piece and bed board 21 fixed connection, the motor drive screw rod rotates, and the cover joint piece drives bed board 21 and moves along hollow structure 11's axial a under the drive of screw rod.
(2) A second way of implementing the translation mechanism to move the bed plate 21 into or out of the hollow structure 11 along the axial direction a of the hollow structure 11 is: the translation mechanism is a rack and pinion assembly, and the rack and pinion assembly includes: gear spare, be used for driving gear spare pivoted motor and transmission to connect in the rack spare of gear spare, rack spare along hollow structure 11 axial a set up and with bed board 21 fixed connection, motor drive gear spare rotates, and the tooth condition drives bed board 21 along hollow structure 11 axial a removal under the drive of gear spare.
(3) A third way of implementing the translation mechanism to move the bed plate 21 into or out of the hollow structure 11 along the axial direction a of the hollow structure 11 is: the translation mechanism is a chain drive assembly, the chain drive assembly comprising: the chain drive assembly comprises: main drive tooth, driven tooth, be used for driving main drive tooth pivoted motor and around locating the chain of main drive tooth and driven tooth, the chain along hollow structure 11 axial a set up and with bed board 21 fixed connection, motor drive the main drive tooth rotates, the chain drives bed board 21 along hollow structure 11 axial a removal under the common drive of main drive tooth and driven tooth.
In an alternative embodiment, the rotating mechanism may include a revolution plate 230 capable of rotating along a preset axial direction b, the bed plate 21 is disposed on the revolution plate 230, and the angle is changed along with the rotation of the revolution plate 230, and the rotation of the revolution plate 230 drives the bed plate 21 to rotate, so as to meet the requirement of the rotation angle of the patient during the non-coplanar irradiation radiotherapy.
In another optional embodiment, the treatment couch 20 further includes a couch plate support portion 24, a lower end of the couch plate support portion 24 is connected with the revolution plate 230, the couch plate 21 is movably disposed above the couch plate support portion 24, and the revolution plate 230 can drive the couch plate support portion 24 and the couch plate 21 to rotate together when rotating, so as to meet the requirement of the rotation angle of the patient during the non-coplanar irradiation radiotherapy. A translation mechanism may be provided on the bed plate support 24 to effect movement of the bed plate 21 into or out of the hollow structure 11 in the axial direction a of the hollow structure 11.
In an alternative embodiment, the radiotherapy apparatus 100 can further comprise a base 40, the frame 10 is rotatably connected with the base 40, and the treatment assembly 30 is disposed on the inner wall of the frame 10. The frame 10 can rotate around the axial direction a of the hollow structure 11 relative to the base 40 to drive the therapeutic head 31 of the therapeutic assembly 30 to rotate around the axial direction a of the hollow structure 11.
In this embodiment, the radiotherapy apparatus 100 may further comprise a rotation bearing 50 and a driving device 60. The frame 10 is rotatably connected with the base 40 through a rotary bearing 50, and the driving device 60 is used for driving the frame 10 to rotate around the axial direction a of the hollow structure 11 relative to the base 40 so as to realize the rotation of the treatment head 31 of the treatment assembly 30 around the axial direction a of the hollow structure 11.
In other embodiments, the frame 10 may include an inner ring and an outer ring sleeved outside the inner ring, the middle of the inner ring is formed with the hollow structure 11, and the treatment head 31 is disposed inside the inner ring. The inner ring can be rotated relative to the outer ring about the axial direction a of the hollow structure 11 by the driving device 60 (or other driving structure) to rotate the treatment head 31 of the treatment assembly 30 about the axial direction a of the hollow structure 11. It should be noted that the way of rotating the treatment head 31 of the treatment assembly 30 around the axial direction a of the hollow structure 11 is not limited to the two ways described in the above embodiments, and the invention is not limited thereto.
In an alternative embodiment, the driving device 60 is disposed in the base 40, and when the radiotherapy device 100 is in the first state or the second state, the driving device 60 drives the rack 10 to rotate around the axial direction a of the hollow structure 11 relative to the base 40 through the rotary bearing 50. The treatment assembly 30 is disposed on an inner wall of the gantry 10 and is rotatable with the gantry 10 about an axial direction a of the hollow structure 11 relative to the base 40 to perform coplanar or non-coplanar radiotherapy on a patient positioned on the couch plate 21.
In another alternative embodiment, the driving device 60 is a variable speed driving device 60, and the variable speed driving device 60 can drive the frame 10 to rotate at least two speeds.
In one embodiment of the present invention, the variable speed drive 60 includes a first drive mode and a second drive mode. When the treatment head 31 moves into the frame 10, the variable speed driving device 60 switches to the first driving mode, and the variable speed driving device 60 drives the frame 10 to rotate at the first speed. When the treatment head 31 moves out of the frame 10, the variable speed driving device 60 switches to the second driving mode, and the variable speed driving device 60 drives the frame 10 to rotate at the second speed, which is smaller than the first speed. It can be appreciated that when the driving device 60 is in the first driving mode, the first speed is higher, which is suitable for higher-speed clinical treatment and increases the treatment efficiency. When the driving device 60 is in the second driving mode, the treatment head 31 moves to the outside of the frame 10, when the preset axial direction b is adjusted, the treatment head 31 located outside the frame 10 may collide with the treatment couch 20 by mistake, the second speed is low, the damage to the radiotherapy device 100 can be reduced, the service life of the device can be prolonged, and when a patient is on the treatment couch 20, the safety of the patient can be protected.
Further, the variable speed driving device 60 includes a motor, a gear assembly, a sprocket assembly, a clutch device, and a transmission shaft connected with the frame 10.
When the variable speed drive 60 is in the first drive mode, the clutch device switches the gear assembly to connect with the motor and the drive shaft, the motor driving the gear assembly to rotate at a first speed. When the variable speed drive 60 is in the second drive mode, the clutch device switches the sprocket assembly to connect with the motor and the drive shaft, the motor driving the sprocket assembly to rotate at the second speed. It will be appreciated that the motor outputs the same power, and the speed at which the motor drives the sprocket assembly to rotate the transmission shaft should be less than the speed at which the motor drives the gear assembly to rotate the transmission shaft, so that the gear assembly or the sprocket assembly is switched by the clutch device to connect the motor and the transmission shaft to switch the first speed and the second speed.
In an embodiment of the present invention, the treatment assembly 30 further includes a moving assembly 32, the moving assembly 32 is disposed inside the frame 10, and the moving assembly 32 is used for moving the treatment head 31 along the axial direction a of the hollow structure 11.
Further, the moving assembly 32 includes a carrier 320 and a guide rail 321, the guide rail 321 is disposed on the inner wall of the rack 10 along the axial direction a of the hollow structure 11, the treatment head 31 is disposed on the carrier 320, and the carrier 320 is slidably connected to the guide rail 321, so as to realize that the treatment head 31 moves along the axial direction a of the hollow structure 11, and further realize the working position switching of the treatment head 31.
In an alternative embodiment, the guide rails 321 are linear guide rails. Of course, in other embodiments, the guide rail 321 may have other shapes, and the present application is not limited thereto.
In other examples, the carrier 320 may be fixedly connected to the guide rail 321, and the linear guide rail may be driven by a motor, or the linear guide rail may be driven by an air cylinder, or the linear guide rail may be driven by a hydraulic cylinder to move along the axial direction a of the hollow structure 11, so as to implement the movement of the treatment head 31 along the axial direction a of the hollow structure 11, and further implement the switching of the working position of the treatment head 31.
Although the present application has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application, and all changes, substitutions and alterations that fall within the spirit and scope of the application are to be understood as being covered by the following claims.
Claims (19)
1. A radiotherapy apparatus, characterized in that it comprises:
the device comprises a rack, a first fixing device and a second fixing device, wherein a hollow structure is formed in the middle of the rack;
a treatment couch including a couch plate movable into and out of the gantry, the couch plate being rotatable about a predetermined axial direction;
the treatment assembly is arranged in the hollow structure and comprises a treatment head which can move along the axial direction of the hollow structure, the treatment head can move to the outside of the frame, and the treatment head can rotate around the axial direction of the hollow structure;
the radiotherapy device comprises a first state and a second state, when the radiotherapy device is in the first state, the bed plate is at least partially moved into the rack, and the treatment head is moved into the rack so as to perform radiotherapy on a patient positioned on the bed plate; when the radiotherapy device is in the second state, the bed plate moves to the outside of the rack and rotates to the angle required by treatment along the preset axial direction, and the treatment head moves to the outside of the rack so as to perform radiotherapy on a patient positioned on the bed plate.
2. The radiotherapy apparatus of claim 1, further comprising a base, wherein the frame is rotatably connected to the base, the frame is rotatable relative to the base about an axial direction of the hollow structure, and the treatment assembly is disposed on an inner wall of the frame.
3. The radiotherapy apparatus according to claim 2, further comprising a rotation bearing, an axial direction of which is disposed in parallel with an axial direction of the hollow structure; the swivel bearing includes the stiff end and with the stiff end rotates the expansion end of connecting, the stiff end with the base is connected, the expansion end with the frame is connected.
4. The radiotherapy apparatus of claim 2, further comprising a drive device disposed within the base for driving the gantry to rotate about an axial direction of the hollow structure.
5. Radiotherapy apparatus according to claim 4 in which the drive means is a variable speed drive means capable of driving the gantry to rotate at least two speeds.
6. Radiotherapy apparatus according to claim 5 in which the variable speed drive comprises a first drive mode and a second drive mode;
when the treatment head moves into the machine frame, the variable-speed driving device is switched to a first driving mode, and the variable-speed driving device drives the machine frame to rotate at a first speed; when the treatment head moves out of the machine frame, the variable-speed driving device is switched to a second driving mode, the variable-speed driving device drives the machine frame to rotate at a second speed, and the second speed is smaller than the first speed.
7. The radiotherapy apparatus of claim 6, wherein the variable speed drive comprises a motor, a gear assembly, a sprocket assembly, a clutch device, and a drive shaft, the drive shaft being connected to the gantry;
when the variable speed drive device is in a first drive mode, the clutch device switches the gear assembly to be connected with the motor and the transmission shaft, and the motor drives the gear assembly to rotate at the first speed; when the variable-speed driving device is in a second driving mode, the clutch device switches the chain wheel assembly to be connected with the motor and the transmission shaft, and the motor drives the chain wheel assembly to rotate at the second speed.
8. The radiotherapy apparatus of claim 1, wherein the treatment assembly further comprises a moving assembly disposed inside the gantry, the moving assembly configured to effect axial movement of the treatment head along the hollow structure.
9. Radiotherapy apparatus according to claim 8, in which the moving assembly comprises a carrier and a guide rail, the guide rail is arranged on the inner wall of the frame along the axial direction of the hollow structure, the treatment head is arranged on the carrier, and the carrier is slidably connected with the guide rail so as to realize the axial movement of the treatment head along the hollow structure.
10. Radiotherapy apparatus according to claim 9 in which the rail is a linear rail.
11. Radiotherapy apparatus according to claim 1, in which the treatment head comprises a radiation source adapted to emit a radiation beam along a beam axis which intersects the axial direction of the hollow structure.
12. The radiotherapy apparatus of claim 1, wherein the treatment couch comprises a rotation mechanism for driving the couch plate to rotate in a predetermined axial direction.
13. The radiotherapy apparatus of claim 12, wherein the rotation mechanism comprises a revolution plate capable of rotating along the preset axial direction, and the bed plate is disposed on the revolution plate.
14. Radiotherapy apparatus according to claim 13 in which the treatment couch comprises a couch plate support connected at a lower end thereof to the common carousel, the couch plate being movably disposed above the couch plate support.
15. Radiotherapy apparatus according to claim 1 in which the treatment couch comprises a translation mechanism for driving the couch plate in and out of the hollow structure in an axial direction of the hollow structure.
16. The radiotherapy apparatus of claim 15, wherein the translation mechanism is a lead screw assembly comprising: the screw rod and the screw thread are connected to the sleeve joint piece of the screw rod, the screw rod is arranged along the axial direction of the hollow structure, the sleeve joint piece is fixedly connected with the bed board, and the sleeve joint piece is driven by the screw rod to drive the bed board to move along the axial direction of the hollow structure.
17. The radiotherapy apparatus of claim 15, wherein the translation mechanism is a rack and pinion assembly comprising: gear spare and transmission connect in the rack spare of gear spare, the tooth condition is followed hollow structure's axial setting and with bed board fixed connection, the tooth condition is in drive under the drive of gear spare the bed board is followed hollow structure's axial displacement.
18. Radiotherapy apparatus according to claim 15, in which the translation mechanism is a chain drive assembly comprising: drive the tooth with around locating drive the chain of tooth, the chain is followed hollow structure's axial setting and with bed board fixed connection, the chain is in drive the drive of tooth drives down the bed board is followed hollow structure's axial displacement.
19. The radiotherapy apparatus of claim 1, wherein the gantry comprises an inner ring and an outer ring sleeved outside the inner ring, and the hollow structure is formed in the middle of the inner ring; the inner ring can rotate around the axial direction of the hollow structure relative to the outer ring, and the treatment head is arranged on the inner side of the inner ring.
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| CN201910401631.7A CN110201314B (en) | 2019-05-14 | 2019-05-14 | Radiotherapy device |
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| GB2592183B (en) * | 2019-12-18 | 2023-02-01 | Elekta ltd | A radiotherapy apparatus for delivering radiation to a subject |
| CN114053596B (en) * | 2020-08-04 | 2022-08-09 | 中国原子能科学研究院 | Rotary rack with replaceable treatment head |
| CN114053597B (en) * | 2020-08-04 | 2022-08-09 | 中国原子能科学研究院 | Method for replacing treatment head by rotating frame |
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