Wieser A
Helmholtz Zentrum München-German Research Center for Environmental Health, Institute of Radiation Protection, D-85764 Neuherberg, Germany.
Radiat Prot Dosimetry. 2012 Mar;149(1):71-8. doi: 10.1093/rpd/ncr446. Epub 2011 Nov 28.
Electron paramagnetic resonance dosimetry with tooth enamel has been proved to be a reliable method to determine retrospectively exposures from photon fields with minimal detectable doses of 100 mGy or lower, which is lower than achievable with cytogenetic dose reconstruction methods. For risk assessment or validating dosimetry systems for specific radiation incidents, the relevant dose from the incident has to be calculated from the total absorbed dose in enamel by subtracting additional dose contributions from the radionuclide content in teeth, natural external background radiation and medical exposures. For calculating organ doses or evaluating dosimetry systems the absorbed dose in enamel from a radiation incident has to be converted to air kerma using dose conversion factors depending on the photon energy spectrum and geometry of the exposure scenario. This paper outlines the approach to assess individual dose contributions to absorbed dose in enamel and calculate individual air kerma of a radiation incident from the absorbed dose in tooth enamel.
已证明，利用牙釉质进行电子顺磁共振剂量测定是一种可靠的方法，可用于回顾性确定光子场照射剂量，其最小可检测剂量为100毫戈瑞或更低，这比细胞遗传学剂量重建方法所能达到的剂量更低。对于风险评估或验证特定辐射事件的剂量测定系统，必须通过从牙釉质中的总吸收剂量中减去牙齿中放射性核素含量、自然外部背景辐射和医疗照射的额外剂量贡献，来计算事件的相关剂量。为了计算器官剂量或评估剂量测定系统，必须根据光子能谱和照射场景的几何形状，使用剂量转换因子将辐射事件在牙釉质中的吸收剂量转换为空气比释动能。本文概述了评估牙釉质吸收剂量中个体剂量贡献的方法，并根据牙釉质中的吸收剂量计算辐射事件的个体空气比释动能。
