Department of Radiation Oncology, Royal Adelaide Hospital, Adelaide, South Australia 5000, Australia; School of Physical Sciences and Institute for Photonics and Advanced Sensing, University of Adelaide, Adelaide, South Australia 5005, Australia.
Department of Radiation Oncology, Royal Adelaide Hospital, Adelaide, South Australia 5000, Australia.
Phys Med. 2019 Sep;65:167-171. doi: 10.1016/j.ejmp.2019.08.021. Epub 2019 Sep 5.
The purpose of this study was to investigate the potential of real-time optically stimulated luminescence (rtOSL) measurements of a beryllium oxide (BeO) ceramic fibre-coupled luminescence dosimetry system. By pulsing the stimulation laser during the exposure to ionizing radiation, an rtOSL dose-rate measurement can be obtained which could be stem effect free. A portable rtOSL BeO ceramic fibre-coupled dosimetry system is presented and characterized using a constant dose-rate superficial 140 kVp X-ray beam. The rtOSL was measured for dose-rates between 0.29 and 3.88 Gy/min, controlled by varying the source to surface distance. After correcting for OSL decay during the exposure, a linear dose-rate response of the change in rtOSL (ΔrtOSL) was observed. The ΔrtOSL was also observed to be stem effect free.
本研究旨在探讨实时光激励发光（rtOSL）测量氧化铍（BeO）陶瓷纤维耦合发光剂量测定系统的潜力。通过在电离辐射暴露期间对激励激光进行脉冲，可获得无茎效应的实时 OSL 剂量率测量值。本文介绍并描述了一种便携式实时 OSL BeO 陶瓷纤维耦合剂量测定系统，该系统使用恒定剂量率的浅层 140kVp X 射线束进行测试。通过改变源到表面的距离来控制剂量率在 0.29 到 3.88Gy/min 之间变化，测量实时 OSL。在对暴露期间 OSL 衰减进行校正后，观察到实时 OSL 变化（ΔrtOSL）的线性剂量率响应。还观察到ΔrtOSL 无茎效应。
