Elimination of Cerenkov interference in a fibre-optic-coupled radiation dosemeter.
Elimination of Cerenkov interference in a fibre-optic-coupled radiation dosemeter.
复制标题
消除光纤耦合辐射剂量计中的切伦科夫干扰。
DOI：
10.1093/rpd/nci525
复制
发表时间：
2006
影响因子：
1
通讯作者：
Robert W. Miller
中科院分区：
文献类型：
--
作者：
B. Justus;P. Falkenstein;A. Huston;M. Plazas;H. Ning;Robert W. Miller
基于掺Cu（1+）熔凝石英探测器的发光门控探测的光纤点剂量计有效地消除了由于切伦科夫辐射和天然光纤荧光引起的误差。门控光纤剂量计克服了闪烁和光激励发光方法在光纤点剂量测定中所面临的严重问题。使用提供6 MV X射线脉冲的外射束放射治疗机对剂量计进行测试。门控检测用于区分辐射脉冲期间收集的信号（包括切伦科夫辐射和天然纤维荧光的贡献）与辐射脉冲之间收集的信号（仅包含来自Cu（1+）的长寿命发光）掺杂的熔凝石英检测器。门控检测的发光提供了准确的，实时的剂量测量是线性的吸收剂量，独立的剂量率，是准确的所有领域的大小研究。
An optical fibre point dosemeter based on the gated detection of the luminescence from a Cu(1+)-doped fused quartz detector effectively eliminated errors due to Cerenkov radiation and native fibre fluorescence. The gated optical fibre dosemeter overcomes serious problems faced by scintillation and optically stimulated luminescence approaches to optical fibre point dosimetry. The dosemeter was tested using an external beam radiotherapy machine that provided pulses of 6 MV X rays. Gated detection was used to discriminate the signal collected during the radiation pulses, which included contributions from Cerenkov radiation and native fibre fluorescence, from the signal collected between the radiation pulses, which contained only the long-lived luminescence from the Cu(1+)-doped fused quartz detector. Gated detection of the luminescence provided accurate, real-time dose measurements that were linear with absorbed dose, independent of dose rate and that were accurate for all field sizes studied.