牙釉质电子顺磁共振剂量测定中制备引起的误差：粉碎前后的敏感性

Preparation-induced errors in EPR dosimetry of enamel: pre- and post-crushing sensitivity.

作者信息

Haskell E H, Hayes R B, Kenner G H

机构信息

Division of Radiobiology, College of Medicine, University of Utah, Salt Lake City 84112, USA.

出版信息

Appl Radiat Isot. 1996 Nov-Dec;47(11-12):1305-10. doi: 10.1016/s0969-8043(96)00163-7.

DOI:10.1016/s0969-8043(96)00163-7

PMID:9022189

Abstract

Polyakov et al. (1995) showed errors in dose estimation as a function of grain size for enamel grains given beta irradiation after crushing. We tested the effect of gamma irradiation applied to the specimens before and after crushing. We confirmed Polyakov's observations and found that post-crushing irradiation altered the slope of the dose-response curve of the hydroxyapatite signal and produced a grain-size-dependent offset. No changes in the slope of the dose-response curve were seen in enamel caps irradiated whole before crushing.

摘要

波利亚科夫等人（1995年）表明，对于粉碎后经β射线辐照的牙釉质颗粒，剂量估计误差是粒度的函数。我们测试了在粉碎前后对样本进行γ射线辐照的效果。我们证实了波利亚科夫的观察结果，并发现粉碎后辐照改变了羟基磷灰石信号剂量响应曲线的斜率，并产生了粒度依赖性偏移。在粉碎前对整个牙釉质帽进行辐照时，未观察到剂量响应曲线斜率的变化。