琼脂-丙氨酸自由基剂量测定法对治疗性电子束的能量响应。

Energy response of agar-alanine free radical dosimetry to therapeutic electron beams.

作者信息

Ciesielski B, Reinstein L E, Meek A G, Wielopolski L

机构信息

Brookhaven National Laboratory, SUNY-SB, Radiation Therapy Facility, Upton, New York 11973.

出版信息

Med Phys. 1993 Sep-Oct;20(5):1453-5. doi: 10.1118/1.597130.

DOI:10.1118/1.597130

PMID:8289728

Abstract

Calculations of the energy response of an agar-alanine phantom dosimeter (AAPD) to electrons in the energy range of 0.15-20 MeV together with experimental results at 16 MeV are presented. It is shown that the sensitivity of the EPR dosimeter (EPR signal/Gray) is independent of alanine crystal size and varies less than 2%, in the electron energy range indicated. Thus, the measured free radical density distribution may be used directly as an indication of the absorbed dose distribution in an irradiated phantom.

摘要

本文给出了琼脂 - 丙氨酸体模剂量计（AAPD）在0.15 - 20 MeV能量范围内对电子的能量响应计算结果以及16 MeV时的实验结果。结果表明，在所示电子能量范围内，电子顺磁共振剂量计的灵敏度（电子顺磁共振信号/格雷）与丙氨酸晶体尺寸无关，变化小于2%。因此，所测量的自由基密度分布可直接用于指示辐照体模中的吸收剂量分布。