Neutron capture therapy system

Abstract

The neutron capture therapy system provided by the present application includes an accelerator for generating a charged particle beam, a neutron generating portion that reacts with the charged particle beam to generate a neutron beam, and a beam shaping body. The beam shaping body includes a receiving portion, a retarding body, a reflector, a shielding device and a beam outlet, the receiving portion is provided with a vacuum tube connected to the accelerator, and the neutron generating portion is disposed at an end of the vacuum tube, the vacuum tube transmits the charged particles acceleratedby the accelerator to the neutron generating portion to cause the neutron generating portion to react with the charged particle beam to form the neutron beam, the neutron generating portion moves between a first position and a second position, in the first position, the neutron generating portion reacts with the charged particle beam to generate neutrons, in the second position, the neutron generating portion is detached from the beam shaping body, and the beam shaping body and the shielding device keep the neutron generating portion in the shielding through movement from the first position to the second position to prevent that the radiation leaked from the neutron generating portion is exposed to the worker.

Description

technical field [0001] The invention relates to a radioactive ray irradiation system, in particular to a neutron capture therapy system. Background technique [0002] With the development of atomic science, radiation therapy such as cobalt 60, linear accelerator, and electron beam has become one of the main means of cancer treatment. However, traditional photon or electron therapy is limited by the physical conditions of the radiation itself. While killing tumor cells, it will also cause damage to a large number of normal tissues along the beam path; in addition, due to the different sensitivity of tumor cells to radiation, traditional radiation therapy For more radiation-resistant malignancies (eg, glioblastoma multiforme [0003] (glioblastoma multiforme), melanocytoma (melanoma)) are often poorly treated. [0004] In order to reduce radiation damage to normal tissues around the tumor, the concept of target therapy in chemotherapy (chemotherapy) has been applied to radia...

AI Technical Summary

Problems solved by technology

[0005] In the neutron capture therapy system of an accelerator, the charged particle beam is accelerated by an accelerator, and the charged particle beam is accelerated to an energy sufficient to overcome the Coulomb repulsion force of the nucleus of the neutron generating part in the beam shaping body, and undergoes a nuclear reaction with the neutron generating part To generate neutrons, so in the process of generating neutrons, the neutron generating part will be irradiated by high-power accelerated charged particle beams, and the temperature of the neutron generating part will rise significantly, which will affect the service life of the neutron generating part. Therefore, in order to It is very necessary to replace the neutron generating part, and the neutron generating part irradiated by the high-energy level accelerated charged particle beam will inevitably contain a large amount of radiation, so there must be radiation safety when replacing the neutron generating part Hidden danger

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