乌克兰人群牙齿回顾性电子顺磁共振剂量测定中参数的变异性

Variability of parameters in retrospective EPR dosimetry with teeth for Ukrainian population.

作者信息

Sholom S V, Chumak V V

机构信息

Scientific Center of Radiation Medicine, Melnikova str., 53, Kiev, Ukraine.

出版信息

Appl Radiat Isot. 2005 Feb;62(2):201-6. doi: 10.1016/j.apradiso.2004.08.043.

DOI:10.1016/j.apradiso.2004.08.043

PMID:15607449

Abstract

Variability of EPR signal parameters in retrospective dosimetry with teeth has been studied among five different oblasts (regions) of Ukraine. It was found that the native signal in enamel is region-invariant and has peak-to-peak width of 0.85+/-0.01 mT and intensity of 1.0+/-0.20 normalized units. Low-frequency background signals in the spectra of enamel, expressed in terms of dose were estimated to represent 1520 mGy. Variability of radiation sensitivity among different teeth (inter-sample variability measured using 100 mg aliquots) was (+/-)4% while among different parts of one tooth (intra-sample variability measured using 5-10 mg aliquots)--(+/-)7%.

摘要

在乌克兰五个不同州（地区）对牙齿回顾性剂量测定中电子顺磁共振（EPR）信号参数的变异性进行了研究。结果发现，牙釉质中的天然信号在各地区是不变的，其峰峰值宽度为0.85±0.01 mT，强度为1.0±0.20归一化单位。以剂量表示的牙釉质光谱中的低频背景信号估计为15 - 20 mGy。不同牙齿之间的辐射敏感性变异性（使用100 mg等分试样测量的样本间变异性）为（±）4%，而同一颗牙齿不同部位之间的变异性（使用5 - 10 mg等分试样测量的样本内变异性）为（±）7%。