Beam shaping body for neutron capture therapy

Abstract

The invention, on one hand, provides a beam shaping body for neutron capture therapy, so as to improve the flux and the quality of a neutron source. The beam shaping body comprises a beam inlet, a target material, a retarding body adjacent to the target material, a reflector surrounding the retarding body, a thermal neutron absorber adjacent to the retarding body, a radiation shield arranged inside the beam shaping body and a beam outlet, wherein the target material and a proton beam incident from the beam inlet are subjected to a nuclear reaction to produce neutrons; the neutrons form a neutron beam; the neutron beam limits a spindle; the retarding body retards the neutrons generated from the target material to an epithermal neutron energy region; the retarding body is set to be in a shape containing at least one cone; the retarding body comprises a main body part and a supplementary part surrounding the periphery of the main body part; the material of the supplementary part is different from that of the main body part; the reflector guides neutrons deviating from the spindle back to the spindle to improve the epithermal neutron beam intensity; the thermal neutron absorber is used for absorbing thermal neutrons to avoid over dose with superficial normal tissues in the case of therapy; and the radiation shield is used for shielding leaked neutrons and photons to reduce the normal tissue dose in a non-radiation area.

Description

technical field [0001] The invention relates to a beam shaping body, in particular to a beam shaping body for neutron capture therapy. 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 Treatment for more radioresistant malignant tumors (eg glioblastoma multiforme, melanoma) is often less effective. [0003] In order to reduce radiation damage to normal tissues around the tumor, the concept of target therapy in chemotherapy (chemotherapy) has been applied to radiation therapy; and for tumor cells with high ra...

AI Technical Summary

Problems solved by technology

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 Treatment of more radiation-resistant malignancies (eg, glioblastoma multiforme, melanoma) is often less effective

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