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The medical‐irradiation characteristics for neutron capture therapy at the Heavy Water Neutron Irradiation Facility of Kyoto University Research Reactor
Author(s) -
Sakurai Yoshinori,
Kobayashi Tooru
Publication year - 2002
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.1509444
Subject(s) - irradiation , neutron temperature , neutron , radiochemistry , materials science , research reactor , neutron capture , electromagnetic shielding , dosimetry , nuclear engineering , neutron irradiation , heavy water , nuclear medicine , nuclear physics , chemistry , medicine , physics , composite material , deuterium , engineering
At the Heavy Water Neutron Irradiation Facility of the Kyoto University Research Reactor, the mix irradiation of thermal and epi‐thermal neutrons, and the solo irradiation of epi‐thermal neutrons are available additionally to the thermal neutron irradiation, and then the neutron capture therapy (NCT) at this facility became more flexible, after the update in 1996. The estimation of the depth dose distributions in NCT clinical irradiation, were performed for the standard irradiation modes of thermal, mixed and epi‐thermal neutrons, from the both sides of experiment and calculation. On the assumption that the10 B concentration in tumor part was 40 ppm and the ratio of tumor to normal tissue was 3.5, the advantage depth were estimated to 5.4, 6.0, and 8.0, for the respective standard irradiation modes. It was confirmed that the various irradiation conditions can be selected according to the target‐volume conditions, such as size, depth, etc. Besides, in the viewpoint of the radiation shielding for patient, it was confirmed that the whole‐body exposure is effectively reduced by the new clinical collimators, compared with the old one.