Determining Dosimetric Properties and Lowest Detectable Dose of Fingernail Clippings from their Electron Paramagnetic Resonance Signal
Determining Dosimetric Properties and Lowest Detectable Dose of Fingernail Clippings from their Electron Paramagnetic Resonance Signal
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DOI：
10.1097/hp.0000000000000277
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发表时间：
2015-07-01
期刊：
影响因子：
2.2
通讯作者：
Jiao, Ling
中科院分区：
文献类型：
--
作者：
Wang, Liang;Wang, Xiao;Jiao, Ling
本研究的目的是从指甲的电子顺磁共振信号中研究指甲的剂量学特性和最低可检测剂量。收集了50名健康人的指甲切片，在水中漂洗，并用Cs-137伽马射线照射。接下来，测量了他们暴露前后的电子顺磁共振波谱。照射后68d，照射指甲的辐射诱导信号相对稳定，且辐射诱导信号的强度随剂量的增加而逐渐增强，直至饱和，而照射后指甲的背景信号仅随时间逐渐增加。经辐照的指甲的最低可检测剂量为2Gy.根据这些结果，可以得出结论，在剂量重建过程中必须考虑本征信号的影响。这种电子顺磁共振评估方法可用于核事故后受辐射人群的快速筛查。
The purpose of this study was to investigate the dosimetric properties and the lowest detectable dose of fingernails from their electron paramagnetic resonance signal. Fingernail clippings from 50 healthy individuals were collected, rinsed in water, and irradiated with Cs-137 gamma rays. Next, their electron paramagnetic resonance spectra were measured before and after exposure. The radiation-induced signal from the irradiated fingernails was relatively stable even after 68 d. Further, the intensity of the radiation-induced signal increased with progressive increases in the dose until saturation, while the background signal from the irradiated fingernails increased only gradually with time. The lowest detectable dose of the irradiated fingernails was 2 Gy. On the basis of these results, it can be concluded that the effect of the intrinsic signal must be taken into account during dose reconstruction. This electron paramagnetic resonance assessment method should be useful for the rapid screening of irradiated populations after nuclear accidents.