迈向哺乳动物牙齿的高灵敏度电子自旋共振剂量测定法：化学处理的影响。

Toward high sensitivity ESR dosimetry of mammal teeth: the effect of chemical treatment.

作者信息

Toyoda Shin, Imata Hiroko, Romanyukha Alexander, Hoshi Masaharu

机构信息

Department of Applied Physics, Okayama University of Science, Japan.

出版信息

J Radiat Res. 2006 Feb;47 Suppl A:A71-4. doi: 10.1269/jrr.47.a71.

DOI:10.1269/jrr.47.a71

PMID:16571947

Abstract

Investigations were conducted into chemical treatments suitable for concentrating enamel from cow teeth. Cow teeth could be used as alternative to human teeth for retrospective dosimetry when human teeth are not available. It is essential to remove dentin from tooth enamel for low dose radiation dosimetry in order to avoid interference to the ESR signal from organic radicals. Increasing the period of chemical treatment with KOH and NaOH reduced the signal intensity of the organic radicals. The sensitivity of the dosimetric signal from inorganic radicals increased slightly with length of treatment with NaOH, which is consistent with removal of dentin, and rose to a maximum of 20% after 5 h with KOH (40 degrees C).

摘要

开展了关于适合从牛牙中浓缩牙釉质的化学处理方法的研究。当无法获取人牙时，牛牙可作为人牙的替代品用于回顾性剂量测定。为了避免有机自由基对电子自旋共振（ESR）信号的干扰，对于低剂量辐射剂量测定而言，从牙釉质中去除牙本质至关重要。用氢氧化钾（KOH）和氢氧化钠（NaOH）进行化学处理的时间延长会降低有机自由基的信号强度。来自无机自由基的剂量测定信号的灵敏度随着用氢氧化钠处理时间的延长而略有增加，这与牙本质的去除情况一致，在用氢氧化钾（40摄氏度）处理5小时后，该灵敏度升至最高20%。