Incident contamination lepton doses measured using radiochromic film in radiotherapy

被引：1

作者：

Butson, MJ

Yu, PKN

Metcalfe, PE

机构：

[1] Illawarra Canc Care Ctr, Dept Med Phys, Wollongong, NSW 2500, Australia

[2] City Univ Hong Kong, Dept Phys & Mat Sci, Hong Kong, Peoples R China

来源：

RADIATION MEASUREMENTS | 1998年 / 29卷 / 06期

关键词：

D O I：

10.1016/S1350-4487(98)00072-9

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

Measurement of lepton contamination is achieved across a radiotherapy photon beam and peripheral doses using radiochromic film. An extrapolation technique is used where several layers are suspended in air to measure incident contamination without the-effects of phantom scatter. Surface dose was measured as 11% of D-max for 6 MV beams at central axis and 9% for 10 MV photons for a 10 x 10 cm field size. Peripheral lepton doses were found to decrease compared to central, however, were still measurable. Peripheral lepton dose was found to increase with field size and was 12% and 15%, 2 cm outside the geometric held edge of a 30 x 30 cm field size at 6 and 10 MV respectively. Radiochromic film is a suitable dosimeter for measurement of lepton contamination absorbed dose to surface layers of skin. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：605 / 609

页数：5

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