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    • 5. 发明申请
    • NEUTRON-CAPTURE THERAPY APPARATUS AND METHOD
    • 中枢治疗设备和方法
    • WO1994015670A1
    • 1994-07-21
    • PCT/US1993012433
    • 1993-12-21
    • OTT, Karl, O.
    • A61N05/00
    • A61N5/10A61N2005/109A61N2005/1095
    • Patient treatment rooms (27) are circularly spaced around a nuclear reactor core (16, 17, 18). Shielding (22) provided between the rooms and the core, has neutron transmission passageways (23) from the core for appropriate collimating equipment. The core is cylindrical and multi-regional, with the inner two (16, 17) or three (16, 17, 18) regions containing nuclear fuel, the inner core (16) producing most of the fission neutrons, the first core ring (17) containing a low enrichment fuel, and the third (18) containing thorium or depleted uranium metal or some other heavy metal for inelastic scattering of neutrons and gamma ray absorption. Two moderator rings (19, 20), each containing a different moderator liquid composition with variable thermal neutron absorbers and gamma ray absorbers, surround the multi-regional core. A heavy metal gamma ray shield (21) surrounds the second moderator ring. The arrangement constricts the neutron spectrum in the reactor itself to transmit only epithermal neutrons to patients, without typical spectrum shaping filters.
    • 患者治疗室(27)围绕核反应堆堆芯(16,17,18)循环间隔。 在房间和核心之间提供屏蔽(22),具有来自核心的中子传输通道(23),用于适当的准直设备。 核心是圆柱形和多区域的,内部两个(16,17)或三个(16,17,18)区域包含核燃料,内核(16)产生大多数裂变中子,第一核心环( 17),第三(18)含有钍或贫铀金属或一些其他重金属,用于中子和γ射线吸收的非弹性散射。 两个慢化器环(19,20)均包含不同的具有可变热中子吸收剂和γ射线吸收剂的慢化剂液体组合物,围绕多区域核心。 重金属γ射线屏蔽(21)围绕第二调节环。 该装置限制了反应器本身的中子谱,只传送超热中子给病人,没有典型的频谱整形滤波器。