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The Study of Effectiveness of Combined Proton-Neutron Irradiation of Tumor Cells In Vitro
S N Koryakin1, M V Troshina1, E V Koryakina2
1A. Tsyb Medical Radiological Research Centre - Branch of the National Medical Research Radiological Center, Ministry of Health of the Russian Federation, Obninsk, Russia.
Abstract:
Combined proton-neutron therapy can be the best opportunity for neutron radiation therapy due to highly conformal proton irradiation and high relative biological effectiveness of neutrons. The study compares 4 schemes of sequential in vitro exposure of Chinese hamster fibrosarcoma cells B14-150 to 14.5 MeV neutrons and a scanning beam of protons. Treatment efficiency increased with increasing the contribution of the neutron component to the total dose from 30 to 40% and the delivery of the neutron dose as the first fraction in the two-fraction proton-neutron exposure.
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