使用金属氧化物半导体场效应晶体管（MOSFET）进行体外放射治疗中高能光子体内剂量测定的入射剂量临床结果。

Clinical results of entrance dose in vivo dosimetry for high energy photons in external beam radiotherapy using MOSFETs.

作者信息

Morton J P, Bhat M, Williams T, Kovendy A

机构信息

Department of Physics IT and Engineering, Adelaide Radiotherapy Centre, Adelaide, Australia.

出版信息

Australas Phys Eng Sci Med. 2007 Dec;30(4):252-9. doi: 10.1007/BF03178434.

DOI:10.1007/BF03178434

PMID:18274064

Abstract

Thomson and Nielsen TN-502 RD MOSFETs were used for entrance dose in vivo dosimetry for 6 and 10 MV photons. A total of 24 patients were tested, 10 breast, 8 prostate, 5 lung and 1 head and neck. For prostates three fields were checked. For all other plans all fields were checked. An action threshold of 8% was set for any one field and 5% for all fields combined. The total number of fields tested was 56, with a mean discrepancy of 1.4% and S.D. of 2.6%. Breasts had a mean discrepancy of 1.8% and S.D. of 2.8%. Prostates had a mean discrepancy of 1.3% and S.D. of 2.9%. For 3 fields combined, prostates had a mean of 1.3% and S.D. of 1.8%. These results are similar to results obtained with diodes and TLDs for the same techniques.

摘要

汤姆森和尼尔森TN - 502 RD型金属氧化物半导体场效应晶体管被用于6兆伏和10兆伏光子的体内剂量测定入口剂量。总共对24名患者进行了测试，其中10名乳腺癌患者、8名前列腺癌患者、5名肺癌患者和1名头颈部患者。对于前列腺癌患者检查了三个射野。对于所有其他计划检查了所有射野。为任何一个射野设定的行动阈值为8%，所有射野合并后的阈值为5%。测试的射野总数为56个，平均差异为1.4%，标准差为2.6%。乳腺癌患者的平均差异为1.8%，标准差为2.8%。前列腺癌患者的平均差异为1.3%，标准差为2.9%。对于合并的3个射野，前列腺癌患者的平均值为1.3%，标准差为1.8%。这些结果与使用二极管和热释光剂量计对相同技术所获得的结果相似。