Fattibene Paola, Trompier Francois, Wieser Albrecht, Brai Maria, Ciesielski Bartlomej, De Angelis Cinzia, Della Monaca Sara, Garcia Tristan, Gustafsson H, Hole Eli Olag, Juniewicz M, Krefft K, Longo Anna, Leveque Philippe, Lund Eva, Marrale Maurizio, Michalec Barbara, Mierzwińska Gabriela, Rao J L, Romanyukha Alexander A, Tuner Hasan
Istituto Superiore di Sanità, Viale Regina Elena 299, 00161, Rome, Italy,
Radiat Environ Biophys. 2014 May;53(2):311-20. doi: 10.1007/s00411-014-0533-x. Epub 2014 Mar 27.
This paper presents the results of an interlaboratory comparison of retrospective dosimetry using the electron paramagnetic resonance method. The test material used in this exercise was glass coming from the touch screens of smart phones that might be used as fortuitous dosimeters in a large-scale radiological incident. There were 13 participants to whom samples were dispatched, and 11 laboratories reported results. The participants received five calibration samples (0, 0.8, 2, 4, and 10 Gy) and four blindly irradiated samples (0, 0.9, 1.3, and 3.3 Gy). Participants were divided into two groups: for group A (formed by three participants), samples came from a homogeneous batch of glass and were stored in similar setting; for group B (formed by eight participants), samples came from different smart phones and stored in different settings of light and temperature. The calibration curves determined by the participants of group A had a small error and a critical level in the 0.37-0.40-Gy dose range, whereas the curves determined by the participants of group B were more scattered and led to a critical level in the 1.3-3.2-Gy dose range for six participants out of eight. Group A were able to assess the dose within 20 % for the lowest doses (<1.5 Gy) and within 5 % for the highest doses. For group B, only the highest blind dose could be evaluated in a reliable way because of the high critical values involved. The results from group A are encouraging, whereas the results from group B suggest that the influence of environmental conditions and the intervariability of samples coming from different smart phones need to be further investigated. An alongside conclusion is that the protocol was easily transferred to participants making a network of laboratories in case of a mass casualty event potentially feasible.
本文介绍了使用电子顺磁共振方法进行回顾性剂量测定的实验室间比对结果。本实验中使用的测试材料是来自智能手机触摸屏的玻璃，在大规模放射性事件中可作为偶然剂量计。向13名参与者分发了样品，11个实验室报告了结果。参与者收到了五个校准样品（0、0.8、2、4和10 Gy）和四个盲法辐照样品（0、0.9、1.3和3.3 Gy）。参与者分为两组：A组（由三名参与者组成），样品来自同一批均质玻璃，且存储环境相似；B组（由八名参与者组成），样品来自不同的智能手机，存储在不同的光照和温度条件下。A组参与者确定的校准曲线误差较小，在0.37 - 0.40 Gy剂量范围内有一个临界水平，而B组参与者确定的曲线更为分散，八名参与者中有六名在1.3 - 3.2 Gy剂量范围内出现临界水平。A组能够在最低剂量（<1.5 Gy）时将剂量评估在20%以内，在最高剂量时评估在5%以内。对于B组，由于涉及的临界值较高，只有最高的盲法剂量能够可靠评估。A组的结果令人鼓舞，而B组的结果表明环境条件的影响以及来自不同智能手机的样品的个体差异需要进一步研究。另一个结论是，在可能发生大规模伤亡事件的情况下，该方案很容易转移到参与者身上从而形成一个实验室网络。
