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Synchrocyclotron-based proton heavy ion therapy system

A cyclotron and proton heavy ion technology, which is applied in the field of medical devices, can solve the problems of weakening the axial focusing effect and reducing the degree of magnetic field modulation, so as to reduce the cost and design difficulty, reduce the requirement of accelerating voltage, and reduce the volume and weight Effect

Active Publication Date: 2019-01-18
HEFEI CAS ION MEDICAL & TECHNICAL DEVICES CO LTD +1
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Problems solved by technology

[0006] For an isochronous cyclotron, too high a magnetic field will reduce the degree of magnetic field modulation and weaken the axial focusing effect

Method used

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  • Synchrocyclotron-based proton heavy ion therapy system
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Embodiment Construction

[0039] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0040] A proton heavy ion therapy system based on a synchrocyclotron, such as Figure 1-3 As shown, a synchrocyclotron 1 is included, and the front end of the synchrocyclotron 1 is provided with a PIG cold cathode ion source, and the radius of the ion source end is about 2.5mm. In order to keep the low temperature of the cathode, the pulse duration is selected to be about 50 microseconds, and the pulse The frequency is 1kHz. The protons or heavy ions in the ion source are drawn by the electric field of the central region's...

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Abstract

The invention discloses a synchrocyclotron-based proton heavy ion therapy system. The system is characterized in that the treatment system adopts a synchrocyclotron to accelerate protons or heavy ionsto the highest energy required for treatment; For protons, the maximum energy is 235 MeV. The beam output from the synchrocyclotron enters the high energy transport line for focusing and deflection and is fed to the energy selector. The energy selector makes the beam energy continuously adjustable through the graphite energy reducer. The beam enters a single room and is sent to a rotating gantrysystem, which rotates by +- 185 DEG, allowing the beam to exit in all directions of 360 DEG. Compared with the cyclotron and the synchrotron, the invention can use a magnetic field of up to more than5T to reduce the volume weight of the accelerator, so as to be more compact; And the acceleration voltage requirements are small, reducing the cost of RF system and design difficulties.

Description

technical field [0001] The invention belongs to the field of medical equipment, and in particular relates to a proton heavy ion therapy system based on a synchrocyclotron. Background technique [0002] Proton and heavy ion therapy technology is a kind of radiotherapy, and it is an internationally recognized cutting-edge radiotherapy technology. Different from traditional photon radiotherapy, protons and heavy ions can form energy Bragg peaks, which can limit the dose to the tumor area and reduce the damage to healthy tissues. [0003] Taking proton therapy as an example, the higher-energy protons required for radiotherapy are obtained by high-frequency resonance accelerators. Generally, a proton beam of 70-230 MeV is required to treat tumors with a depth of 30 cm to 315 cm. [0004] Proton heavy ion accelerators mainly include isochronous cyclotrons, synchrotrons, synchrocyclotrons and linear accelerators. The advantage of the isochronous cyclotron is that it is easy to o...

Claims

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Application Information

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IPC IPC(8): A61N5/10
CPCA61N5/1001A61N2005/1087
Inventor 宋云涛周凯陈根黄熙杨庆喜陈永华冯汉升丁开忠郑金星李俊邢以翔刘璐周兵程怡
Owner HEFEI CAS ION MEDICAL & TECHNICAL DEVICES CO LTD
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