L-band electron paramagnetic resonance (EPR) in vivo dosimetry has the potential advantage of being able to accurately and sensitively measure the absorbed dose of ionizing radiation by measurements of teeth in situ. The equipment is transportable to the site where a radiation incident occurred and can be operated without specialized facilities. It, therefore, is very suitable for medical triage of victims in a large-scale radiation incident to quickly determine whether the dose was large enough to require urgent care. The measurements are made on the outer surfaces of the two upper incisor teeth. However, some in vitro studies of extracted teeth using higher frequency EPR have suggested that exposure to ultraviolet rays (UV) from sunlight might confound estimates of the dose of ionizing radiation made with EPR. Because the outer surfaces of incisors are likely to be exposed to UV/sunlight, it, therefore, is essential to determine the potential quantitative impact of UV on L-band EPR dosimetry measurements based on incisors. We, therefore, investigated the quantitative effect of UV on the EPR signal from ionizing irradiation of human teeth using the L-band spectrometer developed for field dosimetry. The UV-generated EPR signal was very small relative to the signals resulting from doses of ionizing radiation that are used for triage. For example, using our estimates of the effects of UV, for a lifetime of 50 years of exposure of these teeth (assuming an average exposure to sunlight of two hours/day), the expected average lifetime effect of UV-induced signal would be equivalent to 0.33 Gy; in contrast, triage criteria for accidental exposure to ionizing irradiation generally start at 2.0 Gy.

L 波段电子顺磁共振 (EPR) 体内剂量测定具有潜在优势，能够通过原位测量来准确灵敏地测量电离辐射的吸收剂量。该设备可运输到发生辐射事件的现场，无需专门设施即可操作。因此，它非常适合在大规模辐射事件中对受害者进行医学分流，以快速确定剂量是否大到需要紧急护理。测量是在两个上切牙的外表面上进行的。然而，一些使用高频 EPR 对拔牙的体外研究表明，暴露于阳光中的紫外线 (UV) 可能会混淆 EPR 产生的电离辐射剂量的估计。由于门牙的外表面可能会暴露在紫外线/阳光下，因此，必须确定紫外线对基于门牙的 L 波段 EPR 剂量测定的潜在定量影响。因此，我们使用为场剂量测定开发的 L 波段光谱仪研究了紫外线对人体牙齿电离辐射 EPR 信号的定量影响。与用于分类的电离辐射剂量产生的信号相比，紫外线产生的 EPR 信号非常小。例如，使用我们对紫外线影响的估计，对于这些牙齿暴露 50 年的寿命（假设平均每天暴露在阳光下两小时），紫外线诱导信号的预期平均寿命影响将是等效的至 0.33 Gy；相比之下，