专利名称：Neutron-capture therapy apparatus and method
发明人：Karl O. Ott
申请号：US07/998994
申请日：19921231
公开号：US05433693A
公开日：
reactor core教程19950718
专利内容由知识产权出版社提供
摘要：Patient treatment rooms are circularly spaced around a nuclear reactor core. Suitable shielding is provided between the rooms and the core, with neutron transmission passageways provided in the shielding from the core to provide space for appropriate collimating equipment. The core is generally cylindrical and multi-regional, with the inner two or three regions containing nuclear fuel, the inner core producing most of the fission neutrons, the first core ring containing a low enrichment fuel, and the third containing thorium or depleted uranium metal or some other heavy metal for inelastic scattering of neutrons and gamma ray absorption. Two moderator rings, each containing a different moderator liquid composition with variable thermal neutron absorbers and gamma ray absorbers, surrounding the multi-regional core. A heavy metal gamma ray shield surrounds the second moderator ring. The arrangement constricts the neutron spectrum in the reactor itself to transmit only epithermal neutrons to the patients, without the typical spectrum shaping filters normally contemplated for use between reactors and treatment subjects.
申请人：OTT; KARL O.
代理机构：Woodard, Emhardt, Naughton, Moriarty & McNett
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