Measurement of the three-dimensional distribution of radiation dose in grid therapy

被引：19
|
作者：
Trapp, JV
Warrington, AP
Partridge, M
Philps, A
Glees, J
Tait, D
Ahmed, R
Leach, MO
Webb, S
机构：
[1] Inst Canc Res, Joint Dept Phys, Sutton SM2 5PT, Surrey, England
[2] Royal Marsden NHS Fdn Trust, Sutton SM2 5PT, Surrey, England
[3] RMIT Univ, Dept Appl Phys, Melbourne, Vic 3001, Australia
[4] Inst Canc Res, Dept Radiotherapy, Sutton SM2 5PT, Surrey, England
[5] Inst Canc Res, Canc Res UK Clin MR Res Grp, Sutton SM2 5PT, Surrey, England
来源：
PHYSICS IN MEDICINE AND BIOLOGY | 2004年 / 49卷 / 19期
关键词：
D O I：
10.1088/0031-9155/49/19/N01
中图分类号：
R318 [生物医学工程];
学科分类号：
0831 ;
摘要：
A single large dose of megavoltage x-rays delivered through a grid is currently being utilized by some centres for palliative radiotherapy treatments of large tumours. In this note, we investigate the dosimetry of grid therapy using two-dimensional film dosimetry and three-dimensional gel dosimetry. It is shown that the radiation dose is attenuated more rapidly with depth in a grid field than an open field, and that even shielded regions receive approximately 25% of the dose to the unshielded areas.
引用
收藏
页码：N317 / N323
页数：7
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