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Dose Linearity and Linear Energy Transfer Dependence of Cr-doped Al_2O_3 Ceramic Thermoluminescence Detector

机译:Cr掺杂Al_2O_3陶瓷热释光探测器的剂量线性和线性能量转移依赖性

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摘要

A Cr-doped alumina (Al2O3:Cr) ceramic thermoluminescent detector (TLD) has the potential to be applied as a two-dimensional (2D) imaging device in radiation therapy. In this work, we investigated the linearity in the dose level of radiotherapy and the linear energy transfer (LET) dependence of Al2O3:Cr ceramic TLD using several species of heavy charged particles (HCPs). The Al2O3:Cr ceramic TLD had good linearity as a function of irradiation dose. However, the large LET-dependent response made it difficult to apply the detector directly to dose measurement in HCP therapy. The combination of two Al2O3 ceramic TLDs, one with Cr doping and one without Cr doping, may be expected to be applied to the measurement of LET distributions because of the different LET dependences.
机译:Cr掺杂的氧化铝(Al2O3:Cr)陶瓷热发光检测器(TLD)有潜力在放射治疗中用作二维(2D)成像设备。在这项工作中,我们研究了放疗剂量水平的线性和Al2O3:Cr陶瓷TLD的线性能量转移(LET)依赖性,它使用了几种重电荷粒子(HCP)。 Al2O3:Cr陶瓷TLD随照射剂量的变化具有良好的线性。但是,大的LET依赖性反应使得难以将检测器直接应用于HCP治疗中的剂量测量。由于不同的LET依赖关系,可以预期将两种Al2O3陶瓷TLD的组合(一种带有Cr掺杂,另一种没有Cr掺杂)用于LET分布的测量。

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