Plato P, Miklos J
Health Phys. 1985 Nov;49(5):873-81. doi: 10.1097/00004032-198511000-00019.
Approximately 80 processors of personal dosimetry in the United States use thermoluminescent dosimeters (TLDs). Recent demands that dosimetry processors be able to measure radiation doses to within +/- 50% of the correct value have focused attention on the reproducibility of the TL elements within each TLD. The phosphors for these TLDs are manufactured by three companies. A dosimetry processor faces three options concerning the quality of the TL elements purchased; trust the supplier's quality control program, screen new TL elements and discard those that are extremely bad, or use element correction factors (ECFs). The first option results in dosimetry processors failing the +/- 50% accuracy requirement due to excessive variability among the TL elements. The second option still permits large precision errors that come close to the +/- 50% accuracy requirement. This paper advocates the third option and presents a 10-step procedure to produce ECFs. The procedure ensures that the ECFs represent only variations among the TL elements and not variations caused by stability problems with the TLD reader. Following is an example of ECF production for 3000 TLDs.
美国约有80家个人剂量测定处理器使用热释光剂量计（TLD）。最近要求剂量测定处理器能够将辐射剂量测量到正确值的±50%以内，这使得人们将注意力集中在每个TLD内热释光（TL）元件的再现性上。这些TLD的磷光体由三家公司生产。剂量测定处理器在购买的TL元件质量方面面临三种选择：信任供应商的质量控制程序、筛选新的TL元件并丢弃那些极差的元件，或者使用元件校正因子（ECF）。第一种选择会导致剂量测定处理器因TL元件之间的过度差异而无法达到±50%的精度要求。第二种选择仍然允许接近±50%精度要求的较大精度误差。本文提倡第三种选择，并提出了一个生成ECF的10步程序。该程序确保ECF仅代表TL元件之间的差异，而不代表由TLD读取器的稳定性问题引起的差异。以下是3000个TLD的ECF生成示例。
