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    • 1. 发明授权
    • Method and apparatus for selectively attenuating a radiation source
    • 用于选择性地衰减辐射源的方法和装置
    • US06920203B2
    • 2005-07-19
    • US10308704
    • 2002-12-02
    • Jonathan ShortJohn Eric TkaczykBrian David YanoffLoucas Tsakalakos
    • Jonathan ShortJohn Eric TkaczykBrian David YanoffLoucas Tsakalakos
    • G21K1/04G21K1/02
    • G21K1/04
    • A technique for selectively attenuating a radiation exposure in which a configurable collimator is employed between the radiation source and the radiation target. The configurable collimator typically comprises an array of independently addressable elements each of which has at least a high and a low attenuation state, though intermediate states may also be accommodated. The elements of the array may be selectively addressed to determine their state and to determine the attenuation profile of the collimator. One embodiment of the technique employs an array of microactuated attenuating louvers which may be selectively actuated to determine their radiation transmittance. A second embodiment of the technique employs a suspension of attenuating nematic colloids which may be ordered by the application of an electric or magnetic field. The ordered state of the nematic colloids within an element determine the radiation transmittance of that element. A third embodiment of the technique employs microfluidics to fill an array of fluid chambers with an attenuating fluid. The level of filling within each chamber determines the attenuation produced by that array element.
    • 一种用于选择性地衰减辐射照射的技术,其中在辐射源和辐射目标之间采用可配置的准直仪。 可配置的准直器通常包括独立可寻址元件的阵列,每个元件具有至少高的和低的衰减状态,尽管也可以容纳中间状态。 可以选择性地寻址阵列的元件以确定其状态并确定准直仪的衰减曲线。 该技术的一个实施例采用可被选择性地致动以确定其辐射透射率的微致动衰减百叶窗阵列。 该技术的第二个实施方案采用可通过施加电场或磁场来排序的衰减向列胶体的悬浮液。 元素内的向列胶体的有序状态决定了该元件的辐射透射率。 该技术的第三实施例采用微流体填充具有衰减流体的流体室阵列。 每个室内的填充水平决定了该阵列元件产生的衰减。