甲状腺监测中系统误差的评估。

Evaluation of systematic errors in thyroid monitoring.

作者信息

Venturini L

机构信息

Instituto de Pesquisas Energéticas e Nucleares, Departamento de Metrologia das Radiações (NM), C. P. 11049, CEP 05422-970 Pinheiros, São Paulo, Brazil.

出版信息

Radiat Prot Dosimetry. 2003;103(1):63-8. doi: 10.1093/oxfordjournals.rpd.a006117.

DOI:10.1093/oxfordjournals.rpd.a006117

PMID:12596991

Abstract

In this manuscript the thyroid is described by a new model. Efficiencies of a NaI(Tl) detector, for 364 keV photons, are calculated using Monte Carlo simulation. Contributions from thyroid size, detector placement and tissue overlay thickness, to the efficiency uncertainty, are evaluated considering the thyroid of a 12 year old subject as a limit for the adult thyroid. For a shielded 3" x 3" NaI(Tl) detector, placed at 20 cm from the neck, a contribution of 18% to the efficiency uncertainty was found.

摘要

在本手稿中，甲状腺由一种新模型描述。使用蒙特卡罗模拟计算了碘化钠（铊）探测器对364 keV光子的效率。以一名12岁受试者的甲状腺作为成人甲状腺的极限，评估了甲状腺大小、探测器放置和组织覆盖厚度对效率不确定性的影响。对于一个屏蔽的3英寸×3英寸碘化钠（铊）探测器，放置在距颈部20 cm处，发现其对效率不确定性的影响为18%。