Characterization of commercial MOSFET detectors and their feasibility for in-vivo HDR brachytherapy

被引：3
作者：
Phurailatpam, Reena [1 ]
Upreti, Rituraj [2 ]
Paul, Siji Nojin [1 ]
Jamema, Swamidas V. [1 ]
Deshpande, Deepak D. [2 ]
机构：
[1] TMC, ACTREC, Dept Radiat Oncol, Navi Mumbai 410210, Maharastra, India
[2] TMC, TMH, Dept Med Phys, Navi Mumbai 410210, Maharastra, India
来源：
PHYSICA MEDICA-EUROPEAN JOURNAL OF MEDICAL PHYSICS | 2016年 / 32卷 / 01期
关键词：
MOSFET; HDR brachytherapy; In vivo dosimetry; Dose linearity; Angular dependence; Depth dependence; PERFORMANCE-CHARACTERISTICS; DOSIMETRY; VERIFICATION;
D O I：
10.1016/j.ejmp.2015.08.009
中图分类号：
R8 [特种医学]; R445 [影像诊断学];
学科分类号：
1002 ; 100207 ; 1009 ;
摘要：
Aim: The present study was to investigate the use of MOSFET as an vivo dosimeter for the application of Ir-192 HDR brachytherapy treatments. Material and methods: MOSFET was characterized for dose linearity in the range of 50-1000 cGy, depth dose dependence from 2 to 7 cm, angular dependence. Signal fading was checked for two weeks. Result and discussion: Dose linearity was found to be within 2% in the dose range (50-1000 cGy). The response varied within 8.07% for detector-source distance of 2-7 cm. The response of MOSFET with the epoxy side facing the source (0 degree) is the highest and the lowest response was observed at 90 and 270 degrees. Signal was stable during the study period. Conclusion: The detector showed high dose linearity and insignificant fading. But due to angular and depth dependence, care should be taken and corrections must be applied for clinical dosimetry. (C) 2015 Associazione Italiana di Fisica Medica. Published by Elsevier Ltd. All rights reserved.
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收藏
页码：208 / 212
页数：5
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