CN212593548U - Superconducting rotating frame for proton cancer treatment device - Google Patents
Superconducting rotating frame for proton cancer treatment device Download PDFInfo
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- CN212593548U CN212593548U CN202021307111.4U CN202021307111U CN212593548U CN 212593548 U CN212593548 U CN 212593548U CN 202021307111 U CN202021307111 U CN 202021307111U CN 212593548 U CN212593548 U CN 212593548U
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Abstract
The utility model discloses a superconductive rotating frame for a proton cancer treatment device, which belongs to the field of medical appliances. The superconducting rotating machine frame comprises a scanning treatment head, a vacuum system, a beam transmission system and a beam diagnosis system, wherein a plurality of mixed field type superconducting deflection magnets are arranged in the beam transmission system, the mixed field type superconducting deflection magnets provide a mixed magnetic field, the mixed magnetic field is formed by superposing a four-pole magnetic field, a six-pole magnetic field and other high-order magnetic fields on the basis of a two-pole deflection magnetic field, and the superconducting rotating machine frame has the functions of deflection, focusing and the like. The utility model discloses a mixed field type superconducting magnet technique has alleviateed the total weight of rotatory frame, has reduced the cost of rotatory frame.
Description
Technical Field
The utility model belongs to the field of medical equipment, concretely relates to superconductive rotating frame for proton cancer treatment device.
Background
Proton cancer therapy is a very advantageous radiotherapy technique because proton energy deposition in the body has a bragg peak, and therefore, the proper proton energy and lateral irradiation range are selected, which can form the maximum dose irradiation at the tumor site in the patient. Compared with the traditional radiotherapy technologies such as X-ray, gamma ray, electron and the like, the method has the advantages of being more accurate and causing the peripheral normal tissues to be less damaged by irradiation, and is a development direction of a new generation of radiotherapy technology. Proton cancer treatment devices typically use cyclotron, synchrotron, or linear accelerator devices. The existing proton cancer treatment device usually designs a rotating rack for irradiating a patient in multiple angles, but the design scheme adopted by many rotating racks uses a normal-temperature magnet, and because a beam distribution system needs to realize multiple functions, the weight of rotating rack equipment is large and reaches hundreds of tons, and the manufacturing cost of the whole rotating rack is very expensive.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a superconductive rotating frame for proton cancer treatment device, this rotating frame adopt mixed type superconducting magnet's technique, have simplified rotating frame's bunch structure, avoid the beam current envelope increase too big in rotating frame transmission process, reduce the overall cost.
The technical scheme of the utility model be, a superconductive rotating frame for proton cancer therapy device, including scanning treatment head, vacuum system, beam transmission system and beam diagnostic system, its characterized in that: the beam transmission system is provided with a plurality of mixed field type superconducting deflection magnets, the mixed field type superconducting deflection magnets are used for providing a mixed magnetic field, the mixed magnetic field is formed by superposing high-order magnetic fields such as a quadrupole magnetic field, a hexapole magnetic field and the like on the basis of a dipolar deflection magnetic field, and the mixed magnetic field has the functions of deflection, focusing and the like.
More than two mixed field type superconducting deflection magnets are arranged in the beam transmission system, and a slit is arranged between the mixed field type superconducting deflection magnets to select the energy of the beam.
A quadrupole lens group is added in the beam transmission system and used for adjusting beam parameters. The quadrupole lens groups can be symmetrically or asymmetrically arranged on two sides of the plane of the mixed field type superconducting deflection magnet.
The utility model has the advantages that:
the utility model discloses a mixed field type superconductive deflection magnet technique controls proton beam through mixed field type superconductive deflection magnet, realizes the rising of line current, and the level deflects, descends, final vertical incidence patient's tumour position. The utility model discloses use mixed type superconducting magnet can the whole bunch of greatly reduced go up the weight of magnet to reduce the total weight of bunch in the whole rotating frame, reduce the manufacturing degree of difficulty and the total cost of rotating frame.
Drawings
FIG. 1 is a schematic view of a rotary frame for a proton cancer treatment device according to the present invention;
fig. 2 is a schematic diagram of the hybrid field superconducting deflection magnet of the present invention providing a hybrid magnetic field;
figure 1-scanning treatment head; 2- -vacuum system; 3-beam diagnosis system; 4-mixed field superconducting deflection magnet.
Detailed Description
The present invention is further illustrated by the following examples. It is noted that the disclosed embodiments are intended to aid in further understanding of the invention, but those skilled in the art will appreciate that: various substitutions and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the present invention should not be limited to the embodiments disclosed, and the scope of the present invention is defined by the appended claims.
The rotating frame for the proton accelerator comprises a scanning treatment head 1, a vacuum system 2, a beam diagnosis system 3 and a beam transmission system, wherein the scanning treatment head 1 comprises a scanning magnet and a dose detector and a position detector of a gas ionization chamber which are matched with the scanning magnet; the vacuum system 2 comprises a beam vacuum pipeline, a cavity, a vacuum pump and a valve; the beam diagnosis system 3 is used for monitoring information such as beam position, distribution and electric quantity in the beam vacuum pipeline and comprises a cavity BPM beam position detector and a gas ionization chamber position detector which are arranged along a beam line, and a gas ionization chamber dose detector and a position detector which are arranged at a treatment head; the beam transmission system is used for realizing the rising, horizontal deflection and falling of beams and is provided with one or more mixed field type superconducting deflection magnets 4, the mixed field type superconducting deflection magnets can provide a mixed magnetic field structure, the mixed magnetic field is formed by superposing high-order magnetic fields such as a four-pole magnetic field, a six-pole magnetic field and the like on the basis of a deflection magnetic field, and meanwhile, the mixed magnetic field has the functions of deflection, focusing and the like, so that the beam transmission can not be influenced by energy dissipation. The mixed field superconducting deflection magnet of the present invention uses CCT (concealed magnet theta) or DCT (discrete magnet transform) superconducting magnet.
Embodiment one of the utility model
The utility model provides a rotating frame including two mixed type superconducting magnet, as shown in fig. 1, at first, with the restraint by first mixed type superconducting magnet, the restraint direction becomes perpendicular upwards or slope upwards from the level, mixed type deflection magnet deflection angle is between 30-90 degrees, magnetic field of deflection is between 1.5T-4.5T, magnetic field gradient 10-50T/m in quadrupole magnetic field, the radius of deflection is between 0.3 meter-1.2 meters, and simultaneously, can select the ability to restraint flow in first mixed type superconducting magnet, adjust through the slit width behind first mixed type superconducting deflection magnet and realize selecting the ability function, adjust the energy spectrum shape of restraint. After passing through the first mixed superconducting magnet, a beam diagnosis system, a BPM beam position detector or a gas ionization chamber position detector is installed and used for measuring beam parameters. After the beam diagnosis system, a quadrupole lens group (which can be optionally installed or not installed) is installed, beam parameters such as beam envelope size and the like are controlled by using the focusing function of the quadrupole lens group, and the magnetic field gradient of a quadrupole magnetic field is 10-50T/m. And a second mixed superconducting magnet is arranged behind the quadrupole lens to adjust the beam in the beam direction vertically upwards or obliquely downwards to a vertically downwards direction, the deflection angle of the mixed deflection magnet in the deflection transmission section is between 120 and 180 degrees, the deflection magnetic field is between 1.5 and 4.5T, the magnetic field gradient of the quadrupole magnetic field is 10 to 50T/m, and the deflection radius is between 0.3 and 1.2 meters. After second piece mixed type superconducting magnet, installation scanning treatment head, the utility model discloses install two scanning magnets in the treatment head, carry out x direction and y direction scanning respectively, behind two scanning magnets, install two beam position detectors, carry out beam position measurement, after two beam position detectors, install two beam dose detectors, make the beam realize the wild irradiation of big irradiation through the method of scanning.
Embodiment two of the utility model
The utility model provides a including three mixed field type superconductive deflection magnets, at first with the beam current by first mixed field type superconductive deflection magnet, this mixed field type superconductive deflection magnet's dipolar magnetic field deflection angle is between 30-90 degrees, and the magnetic field that deflects is between 1.5T-4.5T, and the magnetic field gradient in quadrupole magnetic field 10-50T/m, the radius of deflection is between 0.3 meters-1.2 meters. The beam direction changes from horizontal to vertically or obliquely upwards (between 30-90 degrees). After passing through the first mixed-field superconducting deflection magnet, a beam diagnosis system, a BPM beam position detector or a gas ionization chamber position detector is installed and used for measuring beam parameters. After the beam diagnosis system, a quadrupole lens group (which can be optionally installed or not) is installed, beam parameters such as beam envelope size and the like are controlled by using the focusing function of the quadrupole lens group, the envelope size is usually between 10mm and 60mm, the magnetic field gradient of the quadrupole lens is between 5 and 30T/m, and the aperture is 40 to 100 mm. And a second mixed field type superconducting deflection magnet is arranged behind the quadrupole lens to adjust the beam in the direction of the beam vertically upwards or obliquely upwards to the horizontal direction, a quadrupole lens group (which can be optionally arranged or not arranged) is arranged behind the second mixed field type superconducting deflection magnet to control beam parameters such as the beam envelope size, and the parameter range of the quadrupole lens is the same as that of the first block. And a gas ionization chamber is arranged behind the quadrupole lens group to measure beam position parameters. And a third mixed field type superconducting deflection magnet is arranged behind the gas ionization chamber, and deflects the beam current from the horizontal direction to the vertical downward direction. After third mixed field type superconductive deflection magnet, installation scanning treatment head, the utility model discloses install two scanning magnets in the treatment head, carry out x direction and y direction scanning respectively, behind two scanning magnets, install two beam position detectors, carry out beam position measurement, after two beam position detectors, install two beam dose detectors, make the beam realize big irradiation field through the method of scanning and shine the treatment head
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. The invention is not limited to the embodiments described herein, but is capable of other embodiments with obvious modifications and variations, including those shown in the drawings and described herein. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention all still fall within the protection scope of the technical solution of the present invention, where the technical entity does not depart from the content of the technical solution of the present invention.
Claims (4)
1. A superconductive rotating frame for a proton cancer treatment device comprises a scanning treatment head, a vacuum system, a beam transmission system and a beam diagnosis system, and is characterized in that: the beam transmission system is provided with a plurality of mixed field type superconducting deflection magnets, the mixed field type superconducting deflection magnets are used for providing a mixed magnetic field, the mixed magnetic field is formed by superposing high-order magnetic fields such as a four-pole magnetic field, a six-pole magnetic field and the like on the basis of a two-pole deflection magnetic field, and the mixed magnetic field has the functions of deflection, focusing and the like.
2. A superconducting rotating gantry for a proton cancer therapy device according to claim 1, wherein a slit is installed between the mixed-field superconducting deflection magnets, and the slit is used for energy selection of beam current.
3. A superconducting rotating gantry for a proton cancer treatment apparatus as claimed in claim 1, wherein a quadrupole lens set is added to the beam delivery system, and is used for beam parameter adjustment.
4. A superconducting rotating gantry for a proton cancer therapy device according to claim 3, wherein said quadrupole lens groups are symmetrically or asymmetrically arranged on both sides of the plane of the mixed-field superconducting deflection magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021307111.4U CN212593548U (en) | 2020-07-07 | 2020-07-07 | Superconducting rotating frame for proton cancer treatment device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021307111.4U CN212593548U (en) | 2020-07-07 | 2020-07-07 | Superconducting rotating frame for proton cancer treatment device |
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| Publication Number | Publication Date |
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| CN212593548U true CN212593548U (en) | 2021-02-26 |
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| CN202021307111.4U Active CN212593548U (en) | 2020-07-07 | 2020-07-07 | Superconducting rotating frame for proton cancer treatment device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Beijing Rui de Kang Technology Co.,Ltd. Assignor: Peking University Contract record no.: X2023980041624 Denomination of utility model: A superconducting rotating frame for proton cancer treatment equipment Granted publication date: 20210226 License type: Exclusive License Record date: 20230912 |
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| EE01 | Entry into force of recordation of patent licensing contract |