CN113797454A - CT image guided radiotherapy equipment - Google Patents
CT image guided radiotherapy equipment Download PDFInfo
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- CN113797454A CN113797454A CN202111149800.6A CN202111149800A CN113797454A CN 113797454 A CN113797454 A CN 113797454A CN 202111149800 A CN202111149800 A CN 202111149800A CN 113797454 A CN113797454 A CN 113797454A
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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
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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
- A61N5/1048—Monitoring, verifying, controlling systems and methods
- A61N5/1049—Monitoring, verifying, controlling systems and methods for verifying the position of the patient with respect to the radiation beam
- A61N2005/1061—Monitoring, verifying, controlling systems and methods for verifying the position of the patient with respect to the radiation beam using an x-ray imaging system having a separate imaging source
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- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
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- Apparatus For Radiation Diagnosis (AREA)
Abstract
The invention discloses CT image guided radiotherapy equipment, which comprises a fixed rack, a rotating rack, a CT imaging device and a ray emission device, wherein the fixed rack comprises a rack base and a ring-shaped rack fixedly connected to the rack base; the first end of the rotating rack is arranged in a circular through hole of the annular rack and is rotatably connected with the annular rack through a bearing, the rotating rack is driven by the first driving device to rotate along a first direction, the first end of the ray emitting device is connected with a support frame pivot of the ray emitting device through a connecting piece, and the ray emitting device is driven by the second driving device to rotate in a reciprocating mode along a second direction. The invention has the technical effects and advantages that: the process of radiotherapy is simple, the treatment time is shortened, the error of radiotherapy is reduced, the treatment effect is improved, and the damage of radiotherapy to normal internal organs, tissues and cells of a human body is reduced.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a radiation therapy device guided by CT images.
Background
In CT, a certain thickness of the human body is scanned by X-ray beams, and after the X-ray beams are received by a detector and converted into visible light by transmitting through the layer, the visible light is converted into electrical signals by photoelectric conversion, and then the electrical signals are converted into digital signals by an analog/digital converter (analog/digital converter), and the digital signals are input into a computer for processing. The CT can accurately detect the tiny difference of the densities of various tissues on a transverse anatomical plane, is universal in CT examination and application, has good diagnosis effect on diseases such as tumors and the like, and is reliable in diagnosis. The types of CT are many, and there are mainly conventional CT, spiral CT, multi-row detector CT and electron beam CT, wherein the multi-row detector CT is also called multi-row spiral CT and multi-layer spiral CT, which are mainly used in some large hospitals at present, and images of multiple layers can be reconstructed by one scan, so the examination time is shorter and the image quality is higher. The treatment of diseases such as lung and bone is suitable for examining the diseases by X-ray imaging by CT.
For the radiotherapy of tumors such as lung and bone, two steps are usually required, firstly, an imaging device of CT is used to perform image acquisition to determine the radiotherapy region, and a radiotherapy plan is made, and then radiation including α, β and γ rays generated by radioactive isotope and x-rays, electron beams, proton beams and other particle beams generated by various x-ray therapeutic machines or accelerators is emitted to the treated region by a radiotherapy device. The CT imaging equipment and the radiotherapy equipment are mutually independent, so that after image acquisition is completed, the CT imaging equipment has to be transferred to the radiotherapy equipment for radiotherapy, the radiotherapy process is complex, the treatment time is long, large errors exist in treatment due to lack of direct image guidance during radiotherapy, the treatment effect is influenced, and the damages to normal internal organs, tissues and cells of a human body are increased.
In the prior art, the practical application of the medical electron linear accelerator radiotherapy integrated equipment for image guidance through CT is not found, and the high difficulty of the design and manufacture technology is a main obstacle influencing the technical development.
Disclosure of Invention
The present invention is directed to a radiation therapy apparatus with CT image guidance to solve the problems mentioned in the background art. In order to achieve the purpose, the invention provides the following technical scheme: a CT image guided radiation therapy apparatus comprising:
the fixed rack comprises a rack base and a ring-shaped rack fixedly connected to the rack base;
the first end of the rotating rack is arranged in a circular through hole of the annular rack and is rotatably connected with the annular rack through a bearing, the second end of the rotating rack is supported by a supporting roller, the first driving device drives the rotating rack to rotate along a first direction, and the rotating rack is provided with a ray emitting device supporting frame and an arc-shaped sliding rail;
the CT imaging device is arranged on the rotating stand; and
the ray emission device is arranged on the rotating rack, the first end of the ray emission device is connected with the ray emission device support frame through a connecting piece in a pivoting mode, and the second driving device drives the ray emission device to rotate in a reciprocating mode along the second direction;
when the rotating frame and the ray emission device rotate simultaneously, the intersection position of the ray beam axis of the CT imaging device and the ray axis of the ray emission device in the treatment space is kept unchanged.
Preferably, the rotating frame comprises a tubular drum, a first end of the drum is provided with a first flange, a second end of the drum is provided with a second flange, the first flange is rotatably connected with the annular frame through a bearing in a circular through hole of the annular frame, and the treatment space is arranged in the drum.
Preferably, the support device further comprises a support roller fixedly connected with the frame base, and the support roller supports the second flange of the rotating frame.
Preferably, the first driving device comprises a driving servo motor and a speed reducing mechanism which are arranged in the rack base, the driving servo motor is connected with the speed reducing mechanism, and the output end of the speed reducing mechanism drives the first flange through a transmission chain so as to enable the rotating rack to rotate.
Preferably, the CT imaging apparatus 3 comprises a bulb and a detector fixedly connected to the rotating drum at opposite positions, the rotating drum has a first elongated ray through hole and a second elongated ray through hole at opposite positions, the second ray through hole is larger than the first ray through hole, and the ray emitted by the bulb passes through the first ray through hole and the second ray through hole and irradiates the detector.
Preferably, the drum further has a third ray hole, and the ray emitted by the ray emitting device irradiates the region to be treated of the patient through the third ray hole.
Preferably, the drum also has at least two laser through-holes, through which laser emitting devices are irradiated into the interior of the drum.
Preferably, the CT slip ring of the CT imaging apparatus is fixedly connected to an end of the first end of the rotating gantry.
Preferably, the rotating rack further comprises a slide rail support arranged longitudinally along the rotating rack, the arc-shaped slide rail is fixedly connected to one side of the slide rail support, the second end of the ray emission device is fixedly connected with a slide block, and the slide block is matched with the arc-shaped slide rail, so that the ray emission device can reciprocate on the slide rail.
Preferably, a nut seat is arranged at the second end of the ray emission device, the second driving device is a motor lead screw, the motor lead screw comprises a servo motor containing a speed reduction mechanism, a lead screw and a lead screw nut, the lead screw nut is rotatably connected with the nut seat, and the servo motor is fixedly connected to the slide rail bracket.
Preferably, the slide rail bracket is provided with an arc-shaped through hole, the two slide rails are arranged on two sides of the arc-shaped through hole, and the screw rod nut and the nut seat penetrate through the arc-shaped through hole and are rotatably connected.
Preferably, the radiation emitting device at least comprises a radiation emitting device bracket and an accelerating tube of the medical electron linear accelerator, the accelerating tube is mounted on the radiation emitting device bracket, a first end of the radiation emitting device bracket is connected with the radiation emitting device support bracket through a connecting piece in a pivot mode, and the nut seat is arranged at a second end of the radiation emitting device bracket.
The invention has the technical effects and advantages that: CT imaging device and radiotherapy ray emission device are integrated equipment together, consequently, CT's imaging apparatus accomplishes the image acquisition back, need not change the transition and turn to radiotherapy ray emission device and carry out radiotherapy, consequently, radiotherapy's process is fairly simple, and the treatment time also shortens greatly, and simultaneously, CT imaging device provides the image guide for the radiotherapy, greatly reduced radiotherapy's error, improved treatment, reduced the damage of radiotherapy to normal internal organs of human body, tissue and cell.
Drawings
FIG. 1 is a first schematic structural diagram of the present invention;
FIG. 2 is a second schematic structural view of the present invention;
FIG. 3 is a third schematic structural view of the present invention;
FIG. 4 is a schematic view of a rotating gantry configuration of the present invention;
FIG. 5 is a schematic diagram of the ray beam axis of the CT imaging device intersecting the ray axis of the ray emitting device.
In the figure: 1-a fixed frame, 11-a frame base, 12-a ring-shaped frame, 121-a circular through hole, 13-a support roller, 14-a first driving device, 141-a transmission chain, 15-a braking device, 2-a rotating frame, 21-a ray emission device support frame, 22-an arc-shaped slide rail, 23-a rotating drum, 231-a first ray through hole, 232-a second ray through hole, 233-a third ray hole, 234-a laser through hole, 24-a first flange, 25-a second flange, 26-a slide rail bracket, 261-an arc-shaped through hole, 262-a fixed slide rail bracket, 263-a movable slide rail bracket, 27-a mounting plate, a 3-CT imaging device, 31-a spherical tube, 32-a detector, a 33-CT slip ring and a 4-ray emission device, 42-nut seat, 43-second driving device, 431-screw rod, 432-screw rod nut, 433-servo motor, 44-accelerating tube, 45-ray emission device bracket, 46-magnetron, 5-bearing, 6-connecting piece, ray beam axis of A-CT imaging device and ray axis of B-ray emission device.
Detailed Description
In the description of the present invention, it should be noted that unless otherwise specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
As shown in fig. 1-5, a CT image guided radiotherapy apparatus comprises a fixed frame 1, a rotating frame 2, a CT imaging device 3 and a radiation emitting device 4, wherein the fixed frame 1 comprises a frame base 11 and a ring-shaped frame 12 fixedly connected to the frame base 11, a first end of the rotating frame 2 is disposed in a circular through hole 121 of the ring-shaped frame 12 and rotatably connected to the ring-shaped frame 12 through a bearing 5, a second end of the rotating frame 2 is supported by two support rollers 13 to make the rotating frame 2 more stable, a first driving device 14 drives the rotating frame 2 to rotate along a first direction, a rotating axis of the rotating frame 2 coincides with an axis of the circular through hole 121 of the ring-shaped frame 12, the rotating frame 2 is provided with a radiation emitting device support frame 21 and an arc-shaped slide rail 22, the CT imaging device 3 and the radiation emitting device 4 are disposed on the rotating frame 2, the first end of the ray emission device 4 is pivotally connected with the ray emission device support frame 21 through the connecting piece 6, the second driving device 43 drives the ray emission device 4 to rotate on the arc-shaped slide rail 22 in a reciprocating manner along the second direction, wherein when the rotating rack 2 and the ray emission device 4 rotate simultaneously, the intersection point position of the ray beam axis A of the CT imaging device 3 and the ray axis B of the ray emission device 4 in the treatment space is kept unchanged, so that the secondary positioning error of the image positioning of the CT imaging device 3 and the treatment of the ray emission device 4 can be reduced or eliminated.
Further, the rotating gantry 2 comprises a tubular drum 23, a first end of the drum 23 is provided with a first flange 24, a second end of the drum 23 is provided with a second flange 25, a space for installing the CT imaging device 3 and the ray emission device 4 is formed between the first flange 24 and the second flange 25 and the rotary drum 23, the first flange 24 is rotatably connected with the ring-shaped frame 12 through a bearing 5 in the circular through hole 121 of the ring-shaped frame 12, the outer ring of the bearing 5 is connected with the ring-shaped frame 12 at the periphery of the circular through hole 121, the inner ring of the bearing 5 is connected with the edge of the first flange 24, in order to avoid the stress concentration of the rotating frame 2 on the first flange 24, the support rollers 13 fixedly connected with the frame base 11 support the second flange 25 of the rotating frame 2, the treatment space is in the rotary drum 23, and the treated object receives the treatment of the ray emission device 4 in the rotary drum 23 under the guidance of the CT imaging device 3.
Further, the first driving device 14 includes a driving servo motor and a speed reducing mechanism disposed in the frame base 11, an output end of the driving servo motor drives the first flange 24 through the transmission chain 141 to rotate the rotating frame 2, the braking device 15 is fixedly connected to the frame base 11 and is configured to apply an external force to the second flange 25 of the rotating frame 2 for braking, in this embodiment, the braking device 15 is a manual braking device, and two braking pieces clamp the second flange 25 in a hand-cranking manner to stop the rotating frame 2. In some embodiments, the brake 15 may be an electric brake.
Further, the CT imaging apparatus 3 is a multi-row CT, the multi-row CT is used for providing image guidance for the radiotherapy device, the CT imaging apparatus 3 includes a bulb 31 and a detector 32 which are fixedly connected to the rotating drum 23, the rotating drum 23 has a first elongated ray through hole 231 and a second elongated ray through hole 232, which are opposite to each other, the second ray through hole 232 is larger than the first ray through hole 231, and the rays emitted from the bulb 31 pass through the first ray through hole 231, the treatment space and the second ray through hole 232 and irradiate on the detector 32. The drum 23 also has a third ray aperture 233, and the radiation emitted by the radiation emitting device 4 irradiates the treatment space through the third ray aperture 233. The drum 23 further has at least two laser through holes 234, and a laser emitting device (not shown) irradiates the interior of the drum 23 through the at least two laser through holes 234 to provide an auxiliary positioning function for radiotherapy. The CT slip ring 33 of the CT imaging apparatus 3 is fixedly connected to the end of the first end of the rotating frame 2, in this embodiment, the CT slip ring 33 is connected to the end of the first end of the rotating drum 23, and in other embodiments, the CT slip ring 33 may be connected to the end surface of the first flange 24.
Further, the rotating rack 2 further includes a slide rail bracket 26 arranged along the longitudinal direction of the rotating rack 2, the arc-shaped slide rail 22 is fixedly connected to one side of the slide rail bracket 26 facing the ray emission device 4, a second end of the ray emission device 4 is fixedly connected with a slide block (not shown), the slide block is matched with the arc-shaped slide rail 22, the ray emission device 4 reciprocates on the slide rail along a second direction, a nut seat 42 is arranged at the second end of the ray emission device 4, the second driving device 43 is a motor lead screw, the motor lead screw includes a servo motor 433, a lead screw 431 and a lead screw nut 432, the lead screw nut 432 is rotatably connected with the nut seat 42, the servo motor 433 drives the lead screw 431 to rotate in the lead screw nut 432, and the servo motor 433 is fixedly connected to the slide rail bracket 26. The slide rail bracket 26 has a long and narrow arc-shaped through hole 261, two arc-shaped slide rails 22 are disposed at two sides of the arc-shaped through hole 261, and the lead screw nut 432 and the nut base 42 are rotatably connected through the arc-shaped through hole 261. The ray emission device 4 at least comprises a ray emission device bracket 45 and an accelerating tube 44 of the medical electron linear accelerator, the accelerating tube 44 is arranged on the ray emission device bracket 45, the first end of the ray emission device bracket 45 is pivotally connected with the ray emission device support frame 21 through a connecting piece 6, and the nut seat 42 is arranged at the second end of the ray emission device bracket 45. In the embodiment, the magnetron 46 and the circulation tube (not shown) which are the constituent components of the medical electron linear accelerator are mounted on the radiation emitting device bracket 45.
In this embodiment, the slide rail bracket 26 includes two fixed slide rail brackets 262 and a movable slide rail bracket 263, the arc-shaped through hole 261 and the arc-shaped slide rail 22 are disposed on the movable slide rail bracket 263, the two fixed slide rail brackets 262 are respectively fixedly connected with the first flange 24, the second flange 25 and the rotary drum 23, the movable slide rail bracket 263 is detachably connected with the two fixed slide rail brackets 262, and in some embodiments, the slide rail bracket 26 may be integrally fixedly connected or detachably connected with the first flange 24, the second flange 25 and the rotary drum 23.
In this embodiment, the rotating gantry 2 is further provided with a plurality of mounting plates 27 for fixedly mounting components of the CT imaging apparatus 3 and components of the medical electron linac other than the acceleration tube 44, the magnetron 46 and the circulation tube.
Finally, it should be noted that: 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 various changes, modifications, equivalents, and improvements may be made without departing from the spirit and scope of the invention.
Claims (12)
1. A CT image guided radiation therapy apparatus, comprising:
the fixed rack comprises a rack base and a ring-shaped rack fixedly connected to the rack base;
the first end of the rotating rack is arranged in a circular through hole of the annular rack and is rotatably connected with the annular rack through a bearing, the second end of the rotating rack is supported by a supporting roller, the first driving device drives the rotating rack to rotate along a first direction, and the rotating rack is provided with a ray emitting device supporting frame and an arc-shaped sliding rail;
the CT imaging device is arranged on the rotating stand; and
the ray emission device is arranged on the rotating rack, the first end of the ray emission device is connected with the ray emission device support frame through a connecting piece in a pivoting mode, and the second driving device drives the ray emission device to rotate in a reciprocating mode along the second direction;
when the rotating frame and the ray emission device rotate simultaneously, the intersection position of the ray beam axis of the CT imaging device and the ray axis of the ray emission device in the treatment space is kept unchanged.
2. The CT image guided radiation therapy apparatus of claim 1, wherein: the rotating frame comprises a tubular rotating drum, a first flange is arranged at the first end of the rotating drum, a second flange is arranged at the second end of the rotating drum, the first flange is rotatably connected with the annular frame through a bearing in a circular through hole of the annular frame, and the treatment space is arranged in the rotating drum.
3. The CT image guided radiation therapy apparatus of claim 2, wherein: the support roller is fixedly connected with the rack base and supports the second flange of the rotating rack.
4. The CT image guided radiation therapy apparatus of claim 2, wherein: the first driving device comprises a driving servo motor and a speed reducing mechanism which are arranged in the rack base, the driving servo motor is connected with the speed reducing mechanism, and the output end of the speed reducing mechanism drives the first flange through a transmission chain so as to enable the rotating rack to rotate.
5. The CT image guided radiation therapy apparatus of claim 2, wherein: the CT imaging device comprises a bulb tube and a detector which are fixedly connected to the rotary drum at opposite positions, the rotary drum is provided with a first long and narrow ray through hole and a second long and narrow ray through hole which are opposite, the second ray through hole is larger than the first ray through hole, and rays emitted by the bulb tube pass through the first ray through hole and the second ray through hole and irradiate on the detector.
6. The CT image guided radiation therapy apparatus of claim 5, wherein: the rotary drum is also provided with a third ray hole, and the ray emitted by the ray emitting device irradiates the area to be treated of the patient through the third ray hole.
7. The CT image guided radiation therapy apparatus of claim 6, wherein: the rotating drum is also provided with at least two laser through holes, and the laser emitting device penetrates through the at least two laser through holes to irradiate the interior of the rotating drum.
8. The CT image guided radiation therapy apparatus of claim 1, wherein: and a CT slip ring of the CT imaging device is fixedly connected to the end part of the first end of the rotating frame.
9. The CT image guided radiation therapy apparatus of claim 2, wherein: the rotating rack further comprises a slide rail support which is longitudinally arranged along the rotating rack, the arc-shaped slide rail is fixedly connected to one side of the slide rail support, the second end of the ray emission device is fixedly connected with a slide block, and the slide block is matched with the arc-shaped slide rail, so that the ray emission device can reciprocate on the slide rail.
10. The CT image guided radiation therapy apparatus of claim 9, wherein: the second end of the ray emission device is provided with a nut seat, the second driving device is a motor lead screw, the motor lead screw comprises a servo motor, a lead screw and a lead screw nut, the servo motor comprises a speed reducing mechanism, the lead screw nut is rotatably connected with the nut seat, and the servo motor is fixedly connected to the slide rail support.
11. The CT image guided radiation therapy apparatus of claim 10, wherein: the slide rail support is provided with arc-shaped through holes, the two arc-shaped slide rails are arranged on two sides of the arc-shaped through holes, and the lead screw nut and the nut seat penetrate through the arc-shaped through holes and are rotatably connected.
12. The CT image guided radiation therapy system of claim 11, wherein: the ray emission device at least comprises a ray emission device bracket and an accelerating tube of a medical electron linear accelerator, the accelerating tube is installed on the ray emission device bracket, the first end of the ray emission device bracket is connected with the ray emission device support frame through a connecting piece in a pivot mode, and the nut seat is arranged at the second end of the ray emission device bracket.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111149800.6A CN113797454A (en) | 2021-09-29 | 2021-09-29 | CT image guided radiotherapy equipment |
| PCT/CN2022/120785 WO2023051392A1 (en) | 2021-09-29 | 2022-09-23 | Ct image-guided radiotherapy device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111149800.6A CN113797454A (en) | 2021-09-29 | 2021-09-29 | CT image guided radiotherapy equipment |
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| Publication Number | Publication Date |
|---|---|
| CN113797454A true CN113797454A (en) | 2021-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111149800.6A Pending CN113797454A (en) | 2021-09-29 | 2021-09-29 | CT image guided radiotherapy equipment |
Country Status (2)
| Country | Link |
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| CN (1) | CN113797454A (en) |
| WO (1) | WO2023051392A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023051392A1 (en) * | 2021-09-29 | 2023-04-06 | 翰斯泰医疗科技(苏州)有限公司 | Ct image-guided radiotherapy device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104971442A (en) * | 2015-01-07 | 2015-10-14 | 吴开东 | Image-guided radiation treatment device |
| CN110382049A (en) * | 2016-12-13 | 2019-10-25 | 优瑞技术公司 | Radiotherapy system and method |
| WO2020133400A1 (en) * | 2018-12-29 | 2020-07-02 | 清华大学 | Tomography and image-guided radiotherapy device |
| CN211097111U (en) * | 2019-11-15 | 2020-07-28 | 山东新华医疗器械股份有限公司 | Tumor radiotherapy image guide equipment |
| CN113797454A (en) * | 2021-09-29 | 2021-12-17 | 翰斯泰医疗科技(苏州)有限公司 | CT image guided radiotherapy equipment |
-
2021
- 2021-09-29 CN CN202111149800.6A patent/CN113797454A/en active Pending
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2022
- 2022-09-23 WO PCT/CN2022/120785 patent/WO2023051392A1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023051392A1 (en) * | 2021-09-29 | 2023-04-06 | 翰斯泰医疗科技(苏州)有限公司 | Ct image-guided radiotherapy device |
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| Publication number | Publication date |
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| WO2023051392A1 (en) | 2023-04-06 |
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