MONTE CARLO SIMULATION OF LINAC IRRADIATION WITH DYNAMIC WEDGES

被引：0
|
作者：
Chang, Kwo-Ping [1 ,2 ]
Chen, Lu-Yu [3 ]
Chien, Yu-Huang [4 ]
机构：
[1] Tzu Chi Coll Technol, Dept Med Imaging & Radiol Sci, Hualien 970, Taiwan
[2] Tzu Chi Coll Technol, Inst Radiol Sci, Hualien 970, Taiwan
[3] Lotung Poh Ai Hosp, Dept Radiol, Luodong Township 265, Yilan County, Taiwan
[4] Mennonite Christian Hosp, Dept Radiat Therapy, Hualien 970, Taiwan
来源：
RADIATION PROTECTION DOSIMETRY | 2014年 / 162卷 / 1-2期
关键词：
CLINICAL IMPLEMENTATION; COLLIMATOR MOTION; VALIDATION;
D O I：
10.1093/rpd/ncu211
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
This study aims to simulate the dose distributions of LINAC with dynamic wedges (DWs) under various field sizes and wedge angles by the BEAMnrc code with DYNJAWS component module. These were compared with those calculated by the treatment planning system (TPS) and the measured data. All percentage depth doses (PDDs) were found to be in good agreement between TPS, Monte Carlo (MC) and measurements made in open fields and fields with DWs. For dose profiles, compared with the MC and the measurements, TPS gives reliable results for large field sizes (>10 x 10 cm(2)) but results in significant errors in small field sizes (5 x 5 cm(2)). The entrance surface doses calculated by TPS were found to be significantly overestimated. For depths deeper than 0.5 cm, TPS yields PDDs in agreement with MC simulations.
引用
收藏
页码：24 / 28
页数：5
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