远距离治疗束对称性随机架角度的稳定性。

The stability of teletherapy-beam symmetry with gantry angle.

作者信息

Padikal T N, Born C, Roberson P L

出版信息

Radiology. 1981 May;139(2):501-3. doi: 10.1148/radiology.139.2.6784152.

DOI:10.1148/radiology.139.2.6784152

Abstract

The authors describe a rapid means of evaluating the stability of beam symmetry as the gantry angle is varied. Two radiation detectors, a ratio circuit, and an X-Y recorder are used. The teletherapy machine is operated in the rotational mode, and the ionization-current ratio is recorded as a function of the gantry angle. This test can provide an early warning of beam-symmetry instabilities.

摘要

作者描述了一种在机架角度变化时评估射束对称性稳定性的快速方法。使用了两个辐射探测器、一个比率电路和一台X-Y记录仪。远距离治疗机以旋转模式运行，电离电流比作为机架角度的函数被记录下来。该测试可以为射束对称性不稳定提供早期预警。