变色EBT2薄膜在低伽马射线剂量测定中的适用性

Q4 Medicine

International Journal of Low Radiation Pub Date : 2014-01-01 DOI:10.1504/IJLR.2014.068256

E. Antar, S. Gafar, M. El-Ahdal

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引用次数: 7

摘要

放射致色膜已成为评估复杂剂量分布的重要工具。作为一种自显影膜，EBT2非常适合无处理器环境。制备了含有活性层、标记染料(编码)和稳定剂的基于EBT2的辐射剂量计。当伽马射线照射EBT2薄膜时，薄膜吸收光谱发生变化，在631 nm处出现由淡绿色变为深绿色的峰值，辐照后新形成的峰及其与原峰的振幅随吸收剂量的增加而增大。该膜的有效剂量范围为1gy ~ 15gy。因此，它可以作为血液辐照和放射治疗领域的剂量计。叙述了辐照过程中相对湿度对薄膜响应的影响以及不同贮存条件下辐照前后稳定性的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Suitability of gafchromic EBT2 films for dosimetry of low gamma–rays

Radiochromic film has become an important tool to assess complex dose distributions. As a self–developing film, EBT2 is a perfect fit for the processor–less environment. Radiation dosimeters based on EBT2 containing active layer, marker dye (coded) and stabiliser have been prepared. EBT2 films undergo radiation when subjected to gamma rays inducing change in the absorption spectra in the film which converts from faint green to deep green peaking at 631 nm, and upon irradiation the new developed peak and their amplitudes with the original peak increase with the increase of absorbed dose. The useful dose range of this film is 1 cGy to 15 Gy. So it can be used as a dosimeter in the field of blood irradiation and radiotherapy. The effect of relative humidity during irradiation on the response of films as well as pre– and post–irradiation stability at different storage conditions was described.

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来源期刊

International Journal of Low Radiation Environmental Science-Health, Toxicology and Mutagenesis

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期刊介绍： The IJLR is a peer-reviewed journal dedicated to the publication of research articles, review papers and technical notes in all domains related to low-dose radiation, among which are the biological and health effects in humans and the biota, in vitro and in vivo research on low radiation effects, regulatory and policy aspects, risk estimation and public perception.