A medical proton linear accelerator

Abstract

The invention discloses a medical proton linear accelerator. The medical proton linear accelerator comprises an ECR ion source, an RFQ accelerator, an SDTL and a traveling wave proton accelerator which are connected in sequence; a separated type drift tube linear accelerator, namely SDTL, is adopted in an intermediate energy acceleration section; the traveling wave proton accelerator is adopted in a high energy acceleration section, so that the medical proton linear accelerator is more compact in structure and smaller in occupied space; the energy of the emitted proton beams can be continuously adjustable within a rang of 70-250MeV, so that the requirement of adjusting energy of different beams in a patient body due to different tumor positions in tumor treatment can be satisfied; in addition, the SDTL and the traveling wave proton accelerator both adopt a structure which is formed by multiple sections connected in sequence, and can be constructed in different periods and different stages, so as to satisfy requirement on proton energy of different hospitals; and energy upgrading also can be performed according to treatment demands in post periods.

Description

technical field [0001] The present application relates to the field of cancer treatment instruments, in particular to a medical proton linear accelerator. Background technique [0002] In today's world, cancer has become a major disease that mainly threatens human life. In recent years, the incidence of cancer in the world has been increasing year by year, and cancer has become the biggest threat to the life and health of Chinese people. At present, the traditional treatment methods for cancer include drug therapy and radiotherapy. Among them, the traditional radiotherapy methods mainly include X-rays and γ-rays. Because the energy release of the rays decreases with the path, these two radiotherapy methods kill cancer cells and damage normal tissues in the path, so postoperative serious effects on the Patient quality of life. [0003] In recent years, the rise of proton and heavy ion technology in China has significant advantages over traditional radiotherapy methods in t...

AI Technical Summary

Problems solved by technology

The proton cyclotron can provide a stable and continuous proton beam, and the beam can be cut off and on quickly, but the built-in ion source needs to be replaced regularly, and the beam energy cannot be adjusted. An energy modulator is connected to reduce the beam energy of the proton beam accelerated by the cyclotron by using scattering. This interception-type proton beam energy adjustment method will generate a large amount of radiation, which will easily cause the activation of the device and increase the radiation shielding cost of the hospital. , and the beam energy utilization rate caused by scattering is low, the beam quality after scattering is poor, and the efficiency of 70MeV passing through is only 2%

The proton synchrotron can provide adjustable proton beams in the range of 70-250MeV, but the synchrotron consists of an injector and a ring accelerator, which occupies a large area, and the entire system architecture is complex, and the injection, energy-up and standardized cycles of the synchrotron require It takes a long time, the effective time corresponding to the extraction platform is very short, and the energy conversion time is slow, resulting in a long time for ineffective treatment; even the improved compact synchrotron still cannot overcome the problem of only providing pulsed proton beams and low average dose rate. Shortcomings, unable to adapt to the needs of rapid and continuous treatment

The proton linear accelerator is easy to extract and inject protons, and can provide a stable and continuous proton beam. The proton beam has almost no loss during acceleration and transmission. It has the advantages of long-term stable operation of the ion source and high dose rate. The patent application number is 201410323833.1 solves the problem of installing a proton linear accelerator in a restricted space area, but because the coupled cavity linear accelerator (CCL) is a standing wave accelerator, the energy of the outgoing proton beam is a fixed value, which still fails to solve the problem that the beam energy of the linear accelerator cannot be continuous. adjustable question

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