CN111450423B - Radiotherapy accelerator capable of rotating in whole circle and using method thereof - Google Patents
Radiotherapy accelerator capable of rotating in whole circle and using method thereof Download PDFInfo
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- CN111450423B CN111450423B CN202010262669.3A CN202010262669A CN111450423B CN 111450423 B CN111450423 B CN 111450423B CN 202010262669 A CN202010262669 A CN 202010262669A CN 111450423 B CN111450423 B CN 111450423B
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- rotor
- accelerator
- stator
- driving unit
- rotating
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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
- A61N5/1077—Beam delivery systems
Abstract
A radiotherapy accelerator capable of rotating in a whole circle and a using method thereof comprise a rotor driving a particle emitter to rotate, a fixed stator, a detection element and a driver. The rotor and the stator are coaxially arranged, the stator is located on the outer side of the rotor, the detection element is arranged at the tail end of the rotor, the inner layer of the rotor is provided with a particle emitter, the outer layer of the rotor is embedded with a permanent magnet, the stator is provided with a stator tooth groove, and the stator tooth groove is provided with a three-phase winding.
Description
Technical Field
The invention relates to the technical field of medical treatment, in particular to a radiotherapy accelerator capable of rotating in a whole circle and a using method thereof.
Background
Radiotherapy, surgery and chemotherapy are also called as three major treatment methods for malignant tumors, and play an important role in the comprehensive treatment of malignant tumors. As a local treatment for malignant tumors, radiotherapy is aimed at delivering sufficient radiation dose to the tumor tissue to maximize the killing of tumor cells, while at the same time maximizing the protection of normal tissues and organs from radiation damage.
The general radiotherapy accelerator can only rotate 180 degrees to perform radiotherapy on tumors, so that the radiotherapy planning time of a doctor and the radiotherapy process of a patient are very long. In recent years, with the rapid development of medical equipment technology, the performance of radiotherapy equipment has been continuously improved, and radiotherapy accelerators capable of performing whole-circle rotation therapy have been proposed, which improve the precision and time of radiotherapy to some extent, but require regular replacement of brushes and fixed rotation, and cannot adjust the direction.
Disclosure of Invention
The present invention aims to overcome the defects of the prior art, and provides a radiotherapy accelerator capable of rotating in a whole circle and an optimization method of a radiotherapy scheme thereof, wherein a shorter rotation direction path can be selected between two adjacent radiotherapy points in the radiotherapy process to shorten the radiotherapy time.
In order to achieve the purpose, the invention adopts the following technical scheme:
a radiotherapy accelerator capable of rotating in a whole circle comprises a rotor, a fixed stator, a detection unit and a control unit, wherein the rotor drives a particle emitter to rotate. The rotor, the stator and the detection element are coaxially arranged, the stator is located on the outer side of the rotor, the detection element is arranged at the tail end of the rotor, the inner layer of the rotor is provided with a particle emitter, the outer layer of the rotor is embedded with a permanent magnet, the stator is provided with a stator tooth space, and the stator tooth space is provided with a three-phase winding.
The permanent magnet may be alnico or a sintered ferrite or a ceramic ferrite.
Preferably, the detecting element is a pulse encoder for detecting the current passing through the stator winding coil and the rotor position, the accelerator rotation accuracy is determined by the encoder accuracy, and for a 17-bit encoder, the accelerator rotates one revolution for each 217 pulse received by the driver, i.e. the accelerator rotates 360 °/131072 for each pulse by 0.0027 °.
Preferably, the driving unit performs positioning control of the accelerator according to a pulse train output by the positioning command device.
The rotation angle of the accelerator is as follows: theta is equal to theta1×n
The rotation speed of the accelerator is:
where θ is the accelerator rotation angle, θ1For each angle of accelerator rotation at a pulse, n is the number of pulses, v is the rotational speed (revolutions per minute), and f is the pulse frequency (number of pulses per second).
Preferably, the driving unit controls the three-phase power to form an electromagnetic field, a given rotating direction and a given rotating speed are set, the accelerator rotor rotates under the action of the magnetic field, meanwhile, the detection unit feeds back signals to the driving unit, and the driving unit compares the feedback values with target values to adjust the rotating angle of the rotor, so that accurate control is achieved.
Drawings
FIG. 1 is a system control diagram;
FIG. 2 is an overall view of the accelerator;
fig. 3 is a view showing the structure of an accelerator rotor.
Wherein, 1 is a stator, 2 is a rotor, 3 is a detection element, 4 is a control unit, 11 is a winding coil, 12 is a stator slot, 21 is a rotor inner layer, 22 is a rotor outer layer, 23 is a particle emitter, and 24 is a permanent magnet.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
Referring to fig. 1-3, the present invention provides a technical solution:
the utility model provides a can radiotheraphy accelerator of whole circle rotation, is including driving particle emitter pivoted rotor 2, fixed stator 1, detecting element 3, drive unit and the control unit 4, rotor 2, stator 1 and the coaxial setting of detecting element 3, stator 1 are located the outside of rotor 2, and detecting element 3 establishes at the end of rotor 2, rotor inlayer 21 is equipped with particle emitter 23, and rotor skin 22 has inlayed permanent magnet 24, be equipped with stator draw-in groove 12 on stator 1, be equipped with three-phase winding coil 11 on the stator draw-in groove 12, permanent magnet can be alnico or sintered ferrite or iron ceramic oxygen alloy.
Preferably, the detecting element is a pulse encoder for detecting the current passing through the stator winding coil and the rotor position, the accelerator rotation accuracy is determined by the encoder accuracy, and for a 17-bit encoder, the accelerator rotates one revolution for each 217 pulse received by the driver, i.e. the accelerator rotates 360 °/131072 for each pulse by 0.0027 °.
Preferably, the driving unit performs positioning control of the accelerator according to a pulse train output by the positioning command device.
The rotation angle of the accelerator is as follows: theta is equal to theta1×n
The rotation speed of the accelerator is:
where θ is the accelerator rotation angle, θ1For each angle of accelerator rotation at a pulse, n is the number of pulses, v is the rotational speed (revolutions per minute), and f is the pulse frequency (number of pulses per second).
Preferably, the driving unit controls the three-phase power to form an electromagnetic field, a given rotating direction and a given rotating speed are set, the accelerator rotor rotates under the action of the magnetic field, meanwhile, the detection unit feeds back signals to the driving unit, and the driving unit compares the feedback values with target values to adjust the rotating angle of the rotor, so that accurate control is achieved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (1)
1. The radiotherapy accelerator capable of rotating in a whole circle is characterized by comprising a rotor (2) driving a particle emitter to rotate, a fixed stator (1), a detection element (3), a driving unit and a control unit (4), wherein the rotor (2), the stator (1) and the detection element (3) are coaxially arranged, the stator (1) is positioned outside the rotor (2), the detection element (3) is arranged at the tail end of the rotor (2), the rotor inner layer (21) is provided with the particle emitter (23), the rotor outer layer (22) is embedded with a permanent magnet (24), the stator (1) is provided with a stator clamping groove (12), the stator clamping groove (12) is provided with a three-phase winding coil (11), the control unit comprises a position controller, a current controller and a speed controller, and the driving unit controls the accelerator according to a pulse string output by a positioning instruction device, the rotation angle of the accelerator is as follows:
the rotation speed of the accelerator is:
where θ is the accelerator rotation angle, θ1N is the number of pulses, v is the number of revolutions, f is the pulse frequency for each angle of accelerator revolution, the permanent magnet is alnico or sintered ferrite or ferrite ceramic, the detecting element is a pulse encoder for detecting the current passing through the stator winding coil and the rotor position, the precision of accelerator revolution is determined by the encodingThe precision of the code device determines that the driving unit controls three-phase electricity to form an electromagnetic field, a given rotating direction and a given rotating speed are set, the accelerator rotor rotates under the action of the magnetic field, meanwhile, the detection unit feeds back signals to the driving unit, and the driving unit compares a feedback value with a target value to adjust the rotating angle of the rotor, so that accurate control is achieved.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010262669.3A CN111450423B (en) | 2020-04-03 | 2020-04-03 | Radiotherapy accelerator capable of rotating in whole circle and using method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010262669.3A CN111450423B (en) | 2020-04-03 | 2020-04-03 | Radiotherapy accelerator capable of rotating in whole circle and using method thereof |
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| Publication Number | Publication Date |
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| CN111450423A CN111450423A (en) | 2020-07-28 |
| CN111450423B true CN111450423B (en) | 2021-07-23 |
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Citations (6)
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| CN106685115A (en) * | 2016-07-26 | 2017-05-17 | 迪百仕电机科技（苏州）有限公司 | Permanent magnet synchronous AC servo motor |
| CN106924888A (en) * | 2015-12-31 | 2017-07-07 | 上海联影医疗科技有限公司 | A kind of radiotherapy equipment |
| JP2018006196A (en) * | 2016-07-05 | 2018-01-11 | 三菱電機株式会社 | Circular accelerator |
| CN108684132A (en) * | 2018-07-04 | 2018-10-19 | 中国原子能科学研究院 | Synchrocyclotron and its high-intensity magnetic field and higher frequency adjustment curve matching process |
| WO2019077544A1 (en) * | 2017-10-19 | 2019-04-25 | Spectrum Dynamics Medical Limited | Moving parts in a nuclear medicine (n-m) imaging system |
| CN110234275A (en) * | 2016-11-15 | 2019-09-13 | 反射医疗公司 | For emitting the system of guiding high-energy photon transmission |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010035395B4 (en) * | 2010-08-25 | 2015-02-12 | Siemens Aktiengesellschaft | Medical examination or treatment facility |
| CN203634188U (en) * | 2013-11-14 | 2014-06-11 | 上海联影医疗科技有限公司 | Radioactive medical device |
| CN105391368B (en) * | 2015-10-13 | 2018-03-20 | 沈阳东软医疗系统有限公司 | A kind of system for measuring linear accelerator treatment head stop position |
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2020
- 2020-04-03 CN CN202010262669.3A patent/CN111450423B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106924888A (en) * | 2015-12-31 | 2017-07-07 | 上海联影医疗科技有限公司 | A kind of radiotherapy equipment |
| JP2018006196A (en) * | 2016-07-05 | 2018-01-11 | 三菱電機株式会社 | Circular accelerator |
| CN106685115A (en) * | 2016-07-26 | 2017-05-17 | 迪百仕电机科技（苏州）有限公司 | Permanent magnet synchronous AC servo motor |
| CN110234275A (en) * | 2016-11-15 | 2019-09-13 | 反射医疗公司 | For emitting the system of guiding high-energy photon transmission |
| WO2019077544A1 (en) * | 2017-10-19 | 2019-04-25 | Spectrum Dynamics Medical Limited | Moving parts in a nuclear medicine (n-m) imaging system |
| CN108684132A (en) * | 2018-07-04 | 2018-10-19 | 中国原子能科学研究院 | Synchrocyclotron and its high-intensity magnetic field and higher frequency adjustment curve matching process |
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| CN111450423A (en) | 2020-07-28 |
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Effective date of registration: 20210621 Address after: No. 440, Yankuang Road, Ji'nan, Shandong Province Applicant after: SHANDONG CANCER HOSPITAL & INSTITUTE (SHANDONG CANCER Hospital) Applicant after: SHANDONG University Applicant after: Jinan Bishan Network Technology Co.,Ltd. Address before: 100025 906, West District, 9th floor, No. 100, Sili, Balizhuang, Chaoyang District, Beijing Applicant before: Beijing Yikang Medical Technology Co.,Ltd. Applicant before: SHANDONG CANCER HOSPITAL & INSTITUTE (SHANDONG CANCER Hospital) Applicant before: SHANDONG University Applicant before: Jinan Bishan Network Technology Co.,Ltd. |
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