CN117618793A

CN117618793A - Barrel type radiation therapy head

Info

Publication number: CN117618793A
Application number: CN202211001008.0A
Authority: CN
Inventors: 宋世鹏; 张千护; 朱小浪
Original assignee: Shanghai Hanstai Medical Technology Co ltd
Current assignee: Shanghai Hanstai Medical Technology Co ltd
Priority date: 2022-08-19
Filing date: 2022-08-19
Publication date: 2024-03-01

Abstract

The invention discloses a cylinder type radiation therapy head, which comprises a shell and also comprises: the rotary frame body is arranged in the shell and is driven to rotate relative to the shell by the rotary driving device; the radiation source system is arranged in the rotary frame body and driven by the rotary frame body to rotate; the ray source swinging mechanism is arranged in the rotary frame body and is used for driving at least part of the ray source system to swing while rotating under the drive of the rotary frame body. The invention has the technical effects and advantages that: the barrel type radiation therapy head can integrate the radiation source device, the radiation source driving device and the control device in the shell, so that the radiation therapy head is miniaturized, can be used in multiple diseases or occasions, and increases application scenes. Meanwhile, the ray source device can flexibly move under the action of the ray source driving device, so that the coke-skin ratio of radiation treatment is improved, and the treatment effect is greatly improved.

Description

Barrel type radiation therapy head

Technical Field

The present disclosure relates to the technical field of medical devices, and in particular, to a barrel-type radiation therapy head.

Background

Radiation therapy is a common local treatment method in the current tumor treatment, and tumor cells are mainly irradiated by radiation, so that the tumor cells are killed. Radiation includes radioisotope generated alpha, beta, gamma rays, and x-rays, electron beams, proton beams, and other particle beams generated by various types of x-ray therapeutic machines or accelerators, and the like. Approximately 70% of cancer patients require radiation therapy in the course of treating cancer. The role and position of radiation therapy in tumor therapy are increasingly prominent, and radiation therapy has become one of the main means for treating malignant tumors.

The radiation therapy head is a key component in radiation therapy equipment, and the existing therapy head mechanism applied to radiation therapy generally comprises a radiation source generating device, a collimation system, a cooling device, a driving mechanism for rotation or swing of the radiation source, an electric control system and the like, so that the whole radiation therapy head mechanism has large volume, is applicable to diseases and occasions, and is particularly difficult to be applied to radiation therapy equipment which needs to track focus points on human body moving organs for radiation therapy.

Disclosure of Invention

The present invention aims to provide a CT image guided radiotherapy apparatus to solve the problems mentioned in the background art. In order to achieve the above purpose, the present invention provides the following technical solutions: a cartridge-type radiation therapy head comprising a housing, further comprising:

the rotary frame body is arranged in the shell and is driven to rotate relative to the shell by the rotary driving device;

the radiation source system is arranged in the rotary frame body and driven by the rotary frame body to rotate;

the ray source swinging mechanism is arranged in the rotary frame body and is used for driving at least part of the ray source system to swing while rotating under the drive of the rotary frame body.

Preferably, the rotation driving device includes: the rotary driving motor drives the ring gear to rotate through the driving gear, and the ring gear drives the rotary frame to rotate.

Preferably, the cartridge-type radiation therapy head further comprises: the inner cover body is arranged at the top of the rotary frame body, is integrally formed or split and fixedly connected with the rotary frame body, and the ring gear is fixedly connected or integrally formed with the inner cover body so as to drive the inner cover body and the rotary frame body to rotate around the axis of the shell; preferably, the shell is a cylindrical body, the cylindrical body comprises a main shell and an upper shell, the rotating frame body is positioned in the main shell, and an outer cover body is arranged on the upper shell.

Preferably, the rotary driving motor is arranged on the shell, the driving gear is arranged at the output end of the motor, and the ring gear is meshed with the driving gear.

Preferably, the rotary frame body is a cylindrical frame body, the cylindrical frame body is connected with the shell through a bearing, the rotary inner ring of the bearing is connected with the outer side of the cylindrical frame body, and the outer ring of the bearing is fixedly connected with the inner side of the shell; preferably, the cylindrical frame body has a first flange at an upper portion thereof and a second flange at a lower portion thereof, and the bearing includes an upper bearing fixed to the first flange and a lower bearing fixed to the second flange.

Preferably, the radiation source swinging mechanism includes: the bearing bracket is fixed in the rotary frame body, and one side of the bearing bracket is provided with an arc-shaped guide rail; the slide carriage is provided with an arc-shaped sliding groove matched with the arc-shaped guide rail or is fixedly provided with a concave sliding block which can be in sliding fit with the arc-shaped guide rail; the swing driving device drives the slide carriage to swing on the arc-shaped guide rail; preferably, the arc guide rail is a double arc guide rail which is parallel to each other, and the sliding groove or the concave sliding block is a double sliding groove or a double concave sliding block which is parallel to each other;

preferably, the slide carriage is of a U-shaped structure and comprises a first side plate and a second side plate, wherein the first side plate and the second side plate are respectively positioned at two sides of the bearing support, and the sliding groove or the concave sliding block is positioned at one side of the first side plate, which is close to the bearing support.

Preferably, the radiation source system comprises a magnetron, an accelerating tube, a collimator and an isolator, wherein the isolator is arranged at the upper end of the other side of the first side plate, the lower end of the other side of the first side plate is fixedly provided with a mounting plate, the mounting plate is provided with the linear accelerator and the collimator, and the magnetron is arranged at one side of the second side plate far away from the bearing bracket.

Preferably, the swing driving device comprises a swing driving motor, a screw and a screw nut, wherein the fixed ends of the swing driving motor and the screw are arranged on the other side of the bearing bracket, the screw nut is fixed on the other side of the second side plate, and the swing driving motor drives the slide carriage to swing through the screw and the screw nut.

Preferably, the cartridge-type radiation therapy head further comprises: the rotary cover body is arranged at the bottom of the rotary frame body, the bottom of the bearing bracket is supported on the rotary cover body, and the rotary cover body is provided with a ray outlet.

Preferably, the cartridge-type radiation therapy head further comprises: the outer cover body is fixedly arranged on the upper shell, and a water, electricity and gas transmission slip ring is arranged between the inner cover body and the outer cover body and is used for transmitting cooling water, inert gas, electric energy and electric signals required by the ray source system into the shell; preferably, the inner housing and the outer housing have a plurality of ventilation holes in their surfaces, at least a portion of the ventilation holes in the outer housing having a fan mounted thereon.

The invention has the technical effects and advantages that: the barrel type radiation therapy head can integrate the radiation source device, the radiation source driving device and the control device in the shell, so that the radiation therapy head is miniaturized, can be used in multiple diseases or occasions, and increases application scenes. Meanwhile, the ray source device can flexibly move under the action of the ray source driving device, so that the coke-skin ratio of radiation treatment is improved, and the treatment effect is greatly improved.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are required in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only one embodiment of the invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a cross-sectional view of a radiation therapy head according to an embodiment of the present invention;

FIG. 2 is a schematic view of a rotating frame of a radiation therapy head according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of another view of the cross-sectional structure of FIG. 1 in accordance with the present invention;

FIG. 4 is a cross-sectional view of a hidden portion of a radiation therapy head according to one embodiment of the present invention;

fig. 5 is a schematic view showing the structure of a slide carriage of a radiation therapy head according to an embodiment of the present invention.

In the figure: 1-housing, 11-main housing, 12-upper housing, 2-rotating frame, 21-first flange, 22-second flange, 3-radiation source system, 31-magnetron, 32-accelerating tube, 33-collimator, 34-isolator, 4-radiation source swing mechanism, 41-carrier bracket, 411-arc guide rail, 42-slide, 422-first side plate, 423-second side plate, 424-mounting plate, 43-swing drive, 431-drive motor, 432-lead screw, 433-nut seat, 5-rotating drive, 51-ring gear, 52-rotating drive motor, 53-drive gear, 6-inner housing, 61-inner vent, 7-rotating cover, 71-radiation outlet, 8-bearing, 81-upper bearing, 82-lower bearing, 9-outer housing, 91-outer vent, 10-hydro-electric slip ring

Detailed Description

In order to make the implementation, creation features, achievement of objects and effects of the present invention easy to understand, some embodiments of the present invention will be described below with reference to the accompanying drawings. It should be apparent that the described embodiments are merely exemplary embodiments of the present invention and not all embodiments.

In the description of the present invention, it should be noted that the positional or positional relationship indicated by the terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "top", "bottom", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "coupled," and "coupled" are to be construed broadly, and may be either a fixed connection or a removable connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; may be a communication between the interiors of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings.

The cylindrical radiotherapy head as shown in fig. 1-5 comprises a shell 1, and further comprises a rotary frame 2, a radiation source system 3, a radiation source swinging mechanism 4 and a rotary driving device 5, wherein the rotary frame 2 is arranged in the shell 1, and the rotary driving device 5 drives the rotary frame 2 to rotate relative to the shell 1. The ray source system 3 is arranged in the rotary frame body 2 and is driven by the rotary frame body 2 to rotate. The radiation source swinging mechanism 4 is arranged in the rotary frame body 2, can be used for driving at least part of the radiation source system 3 to swing under the drive of the rotary frame body 2, so that the radiation emitted by the radiation source system 3 can be rotationally focused, the focal skin ratio of radiation therapy is improved, the therapy effect is optimized, the functional modules are integrated in the barrel type shell, the structure of the barrel type radiation therapy head is miniaturized, the barrel type radiation therapy head can be used in multiple diseases or occasions, and the application scene is increased.

In the present embodiment, the housing 1 is substantially cylindrical, and the rotation driving device 5 drives the rotation frame 2 to rotate about the axis of the housing 1, but it should be understood that the shape of the housing 1 is not limited to a cylindrical housing, such as a cylindrical structure having a square, polygonal or other shape in cross section in other embodiments, and that a radiation therapy head formed by integrating the above functional parts in the accommodating space of a housing falls into the category of the cylindrical radiation therapy head described in the present invention.

In the present embodiment, the rotation driving device 5 includes a ring gear 51, a rotation driving motor 52, and a driving gear 53. The rotary driving motor 52 drives the ring gear 51 to rotate through the driving gear 53, the ring gear 51 drives the rotary frame 2 to rotate, specifically, the rotary driving motor 52 is disposed on the housing 1, the driving gear 53 is disposed at an output end of the rotary driving motor 52, and the ring gear 51 is meshed with the driving gear 53 to rotate under the driving of the driving gear 53, so as to drive the rotary frame 2 to rotate around an axis of the housing 1, and of course, the specific structure of the rotary driving device is not limited thereto, and for example, in other embodiments, a transmission manner such as belt transmission, sprocket transmission, etc. may be adopted to realize the circumferential rotary motion of the rotary frame 2.

Specifically, the barrel-type radiotherapy head further comprises an inner cover 6, the inner cover 6 is arranged at the top of the rotary frame 2 and fixedly connected with the rotary frame 2, and the ring gear 51 is fixedly connected with the inner cover 6 to drive the inner cover 6 and the rotary frame 2 to rotate around the axis of the casing 1. In some embodiments, the inner housing 6 is integrally formed with the rotating housing 2, and the ring gear 51 is disposed on top of the rotating housing 2. In some embodiments, the ring gear 51 is integrally formed with the inner cover 6, and in some embodiments, the ring gear 51 may be directly fixed with the rotating frame 2 for driving the rotating frame to rotate circumferentially.

Specifically, the rotary frame body 2 is a cylindrical frame body, and the cylindrical frame body is hollowed out to achieve a good heat dissipation effect, and is beneficial to the installation of components in the frame body. In order to enable the cylindrical rotating frame body 2 to stably rotate in the shell without generating friction with the shell, the cylindrical rotating frame body 2 is connected with the shell 1 through a bearing 8, a rotating inner ring of the bearing is connected with the outer side of the cylindrical frame body, and an outer ring of the bearing is fixedly connected with the inner side of the shell. In this embodiment, the rotary frame 2 has a first flange 21 at an upper portion and a second flange 22 at a lower portion, and the bearing 8 includes an upper bearing 81 and a lower bearing 82, the upper bearing 81 being fixed to the first flange 21, and the lower bearing 82 being fixed to the second flange 22. In other embodiments, the rotating frame 2 may be disposed in the housing 1 only through a bearing disposed in a middle portion thereof, and may be driven by the rotation driving device 5 to perform circumferential rotation with respect to the housing 1.

In this embodiment, the radiation source swinging mechanism 4 includes a bearing bracket 41, a slide carriage 42, and a swinging driving device 43, where the bearing bracket 41 is fixed on two sides of an inner wall of the rotating frame 2 and can rotate along with the rotating frame 2, one side of the bearing bracket 41 is provided with an arc guide rail 411, the slide carriage 42 is in sliding fit with the arc guide rail 411, at least a part of the radiation source system 3 is installed on the slide carriage 42, so that on one hand the bearing bracket supports and bears the slide carriage 42 and at least a part of the radiation source system 3 installed thereon, and at least a part of the slide carriage and the radiation source system 3 can be driven to perform circumferential rotation and arc swinging so as to realize rotary focusing for the barrel-type radiation therapy head, thereby effectively improving the coke-skin ratio in the radiation therapy process and greatly improving the therapy effect.

Specifically, in this embodiment, a concave slider (not shown in the drawings) capable of being slidably matched with the arc guide rail 411 is fixedly disposed on the slide carriage 42, and the concave slider is fixed in an arc groove on one side of the slide carriage 42 near the arc guide rail 411, and the swinging of the radiation source is realized by sliding the concave slider on the arc guide rail 411, as shown in fig. 1 or fig. 4, in order to make the swinging driving more stable, in this embodiment, it is preferable to use a double arc guide rail, that is, the arc guide rail 411 is a double arc guide rail parallel to each other, so the concave slider and the arc groove on which the concave slider is mounted are also double concave sliders and arc grooves parallel to each other. In other embodiments, however, the panel of carriage 42 that slidably engages arcuate track 411 is of sufficient thickness such that the arcuate slot on the side of carriage 42 adjacent arcuate track 411 is formed to a sufficient depth such that the arcuate slot is in direct sliding engagement with arcuate track 411.

Further, to mount the main components of the radiation source system 3 on the carriage, the carriage 42 in this embodiment has a "U" structure, including a first side plate 422 and a second side plate 423, and the carrier 41 passes through the cavity of the "U" carriage 42, so that the first side plate 422 and the second side plate 423 are respectively located at two sides of the carrier 41, and the concave slider or the sliding groove is located at one side of the first side plate 422 near the carrier 41.

The swing driving device 43 includes a swing driving motor 431, a screw 432, and a screw nut (not shown), wherein fixed ends of the swing driving motor 431 and the screw 432 are mounted on the other side of the carrier 41, the screw nut is fixed on the other side of the second side plate 423, and the swing driving motor 431 drives the slide carriage 42 to swing through the screw 432 and the screw nut. Specifically, in order to facilitate the fixation of the screw nut to the second side plate 423 of the slide carriage 42, the screw nut is fixed to the second side plate 423 through the nut seat 433. Of course, the specific structure of the swing driving device 43 is not limited thereto, and in other specific possible embodiments, the swing of the slide carriage 42 may be implemented by adopting a transmission manner such as an eccentric wheel, a cam, and the like.

In the present embodiment, the radiation source system 3 mainly includes a magnetron 31, an accelerating tube 32, a collimator 33, an isolator 34, and the like; wherein, the isolator 34 is installed at the upper end of one side of the first side plate 422 far away from the bearing bracket 41, the lower end of the other side of the first side plate 422 is fixed with a mounting plate 424, the mounting plate 424 is provided with an accelerator 32 and a collimator 33, and the magnetron 31 is positioned at one side of the second side plate 423 far away from the bearing bracket 41; the connection end of the magnetron 31 is connected to one end of the isolator 34 through a waveguide, the other end of the isolator 34 is connected to the accelerator 32 through a waveguide (not shown in the connection diagram), and the radiation generated through the accelerator is emitted from the radiation outlet 71 through the collimator 33, as shown in fig. 1, in this embodiment, a two-stage collimator is used, and the electron accelerator used is a linear electron accelerator. In addition, it should be noted that the radiation source system of the present invention is implemented by adopting the prior art, and the specific structure and the functions of each functional part of the radiation source system are not described in detail herein; however, the three main components of the radiation source, such as the magnetron, the accelerating tube and the isolator, are reasonably arranged in the installation positions, and the cooling device of the radiation source is arranged outside the cylindrical radiation therapy head, namely, an external cooling water device is adopted, so that the cylindrical radiation therapy head is miniaturized, and the cooling of the radiation source system is realized by adopting the external cooling water device, which will be described later when the water and electricity conveying slip ring 10 is introduced.

In this embodiment, the cartridge-type radiation therapy head further includes a rotary cover 7. The rotary cover 7 is disposed at the bottom of the rotary frame 2, and the bearing bracket 41 is fixed to both sides of the rotary frame 2 in the radial direction, while the bottom is supported on the rotary cover 7, and the rotary cover 7 has a radiation outlet 71. The radiation source system 3 rotates under the drive of the rotating frame 2 and swings, and the emitted radiation is emitted through the radiation outlet 71 and is rotationally focused to perform radiation therapy with excellent effect. In other embodiments, a thin bottom plate (not shown) fixed to the side wall of the housing 11 may be provided below the housing 11 so that the rotary cover 7 is not visible in the housing 11, and a certain gap is provided between the thin bottom plate and the rotary cover 7.

In the present embodiment, the housing 1 is a substantially cylindrical body including a main housing 11 and an upper housing 12, and the rotary frame 2 is located in the main housing 11. In the embodiment of the invention, a barrel type integrated structure is adopted, a radiation source system 3, a radiation source swinging mechanism 4, a rotary driving device 5, other related components (such as an electric control box) and the like are integrated in the shell 1, and each functional component has compact position and reasonable design, so that the integral barrel type radiation therapy head tends to be miniaturized, has smaller volume and can be suitable for being used under multiple diseases or occasions.

In this embodiment, the drum-type radiotherapy head may further include an outer cover 9, where the outer cover 9 is fixedly disposed on the upper housing 12, and a water-gas transmission slip ring 10 is disposed between the inner cover 6 and the outer cover 9, and can be used to transmit cooling water, inert gas, electric energy and electric signals required by the radiation source system 3 into the housing 1, so as to satisfy various working media required by the drum-type radiotherapy head, improve treatment efficiency and treatment effect, and meanwhile, be widely suitable for use in various occasions, and the water-gas transmission slip ring 10 also belongs to the prior art, and the specific structure and principle of the present invention are not repeated herein.

Further, in the present embodiment, the surfaces of the inner housing 6 and the outer housing 9 have a plurality of ventilation holes including the outer ventilation hole 91 and the inner ventilation hole 61. At least part of the outer ventilation holes 91 are provided with fans (not shown in the figure) which can radiate heat and cool the whole cylinder type radiation therapy head, prevent heat damage caused by overheat of equipment in the treatment process and effectively prolong the service life of the equipment.

The barrel-type radiation therapy head can integrate related components such as the radiation source system 3, the radiation source swinging mechanism 4, the rotary driving device 5 and the like into the shell 1, so that the radiation therapy head is more miniaturized, can be used in multiple diseases or occasions, and increases application scenes. Meanwhile, the radiation source system 3 can rotate and focus under the action of the radiation source swinging mechanism 4 and the rotary driving device 5, so that the focal skin ratio of radiation therapy is improved, and the therapeutic effect is greatly improved.

Finally, it should be noted that: the foregoing description of the preferred embodiments of the present invention is not intended to be limiting, but rather, although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes that fall within the true spirit and principle of the present disclosure are intended to be included within the scope of the present disclosure.

Claims

1. A cartridge radiation therapy head comprising a housing, further comprising:

the rotary frame body is arranged in the shell and is driven to rotate relative to the shell through a rotary driving device;

2. The radiation therapy head of claim 1, wherein said rotational drive means comprises:

the rotary rack comprises a ring gear, a rotary driving motor and a driving gear, wherein the rotary driving motor drives the ring gear to rotate through the driving gear, and the ring gear drives the rotary rack body to rotate.

3. The radiation therapy head of claim 2, further comprising: the inner cover body is arranged at the top of the rotary frame body, is integrally formed or split and fixedly connected with the rotary frame body, and the ring gear is fixedly connected or integrally formed with the inner cover body so as to drive the inner cover body and the rotary frame body to rotate around the axis of the shell; preferably, the shell is a cylindrical body, the cylindrical body comprises a main shell and an upper shell, the rotating frame body is positioned in the main shell, and an outer cover body is arranged on the upper shell.

4. The radiation therapy head of claim 2, wherein said rotary drive motor is disposed on said housing, said drive gear is disposed at an output end of said motor, and said ring gear is engaged with said drive gear.

5. The radiation therapy head according to claim 1, wherein said rotary frame is a cylindrical frame, said cylindrical frame and said housing are connected by a bearing, a rotating inner ring of said bearing is connected to the outside of said cylindrical frame, and an outer ring of said bearing is fixedly connected to the inside of said housing; preferably, the cylindrical frame body has a first flange at an upper portion and a second flange at a lower portion, and the bearing includes an upper bearing and a lower bearing, the upper bearing being fixed to the first flange, and the lower bearing being fixed to the second flange.

6. The radiation therapy head of claim 1, wherein said radiation source swing mechanism comprises:

the bearing bracket is fixed in the rotary frame body, and one side of the bearing bracket is provided with an arc-shaped guide rail;

the slide carriage is provided with an arc-shaped sliding groove matched with the arc-shaped guide rail or is fixedly provided with a concave sliding block which can be in sliding fit with the arc-shaped guide rail;

the swing driving device drives the slide carriage to swing on the arc-shaped guide rail; preferably, the arc guide rail is a double arc guide rail which is parallel to each other, and the sliding groove or the concave sliding block is a double sliding groove or a double concave sliding block which is parallel to each other;

preferably, the slide carriage is in a 'U' -shaped structure and comprises a first side plate and a second side plate, the first side plate and the second side plate are respectively positioned at two sides of the bearing support, and the sliding groove or the concave sliding block is positioned at one side of the first side plate, which is close to the bearing support.

7. The radiation therapy head of claim 6, wherein said radiation source system comprises a magnetron, an accelerating tube, a collimator and an isolator, said isolator being mounted on an upper end of the other side of said first side plate, a mounting plate being secured to a lower end of said other side of said first side plate, said mounting plate having a linac and collimator mounted thereon, said magnetron being located on a side of said second side plate remote from said carrier.

8. The radiation therapy head according to claim 7, wherein said swing drive means comprises a swing drive motor, a screw and a screw nut, wherein fixed ends of said swing drive motor and screw are mounted on the other side of said bearing bracket, said screw nut is fixed on the other side of said second side plate, and said swing drive motor drives said slide carriage to swing through said screw and screw nut.

9. The radiation therapy head of claim 6, further comprising a rotary cover disposed at a bottom of said rotary frame, said carrier support being supported at a bottom of said rotary cover, said rotary cover having a radiation outlet thereon.

10. The radiation therapy head of claim 3, further comprising: the outer cover body is fixedly arranged on the upper shell, and a water, electricity and gas transmission slip ring is arranged between the inner cover body and the outer cover body and is used for transmitting cooling water, inert gas, electric energy and electric signals required by the ray source system into the shell; preferably, the inner cover and the outer cover are provided with a plurality of ventilation holes, and at least part of the ventilation holes of the outer cover are provided with fans.