Angular dependence study on dose distribution of MatriXX 2-D chamber array

WANG Xuetao1; 2 CHEN Shaowen3 DAI Zhenhui2 ZHU Lin2 LIU Xiaowei1 1

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Angular dependence study on dose distribution of MatriXX 2-D chamber array

更新时间：2021-03-05

- Angular dependence study on dose distribution of MatriXX 2-D chamber array
- NUCLEAR TECHNIQUES Vol. 35, Issue 2, (2012)
- 作者机构：
  
  1. 中山大学物理科学与工程技术学院
  2. 广东省中医院
  3. 东莞理工学院
- 作者简介：
- 基金信息：
  
  国家自然科学基金(10675175)资助
- DOI：
  CLC： R144
- Published：01 February 2012
- 稿件说明：
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[1]王学涛,陈少文,戴振晖,朱琳,刘小伟.MatriXX二维电离室阵列剂量分布的角度响应[J].核技术,2012,35(02):126-130.

WANG Xuetao1, 2 CHEN Shaowen3 DAI Zhenhui2 ZHU Lin2 LIU Xiaowei1 1. Angular dependence study on dose distribution of MatriXX 2-D chamber array[J]. Nuclear techniques, 2012, 35(2): 126-130.
[1]王学涛,陈少文,戴振晖,朱琳,刘小伟.MatriXX二维电离室阵列剂量分布的角度响应[J].核技术,2012,35(02):126-130. DOI：

WANG Xuetao1, 2 CHEN Shaowen3 DAI Zhenhui2 ZHU Lin2 LIU Xiaowei1 1. Angular dependence study on dose distribution of MatriXX 2-D chamber array[J]. Nuclear techniques, 2012, 35(2): 126-130. DOI：

摘要

用Monte Carlo模拟、三维水箱和MatriXX测量的方法

获取机架角在0°–80°和280°–360°（0°）内的6 MVX射线的离轴比曲线

利用三种曲线分析MatriXX二维电离室阵列的角度响应。结果表明

在0°–60°和300°–360°（0°）

三种方法得到的离轴比曲线一致性较好;在70°–80°和280°–290°

Monte Carlo计算和MatriXX测量的曲线及平面中心点剂量均存在明显差异。研究结果为多机架角度照射合成验证调强放疗计划的剂量分布提供依据。

Abstract

With the gantry angles of 0° 80° and 280° 360°(0°)

the off axis distance(OAR) profiles curves of 6 MV X-ray were obtained by Monte Carlo simulation

3-D water phantom measurement and MatriXX measurement.Comparing the three types of curves

we analyzed the angular dependence of MatriXX 2-D chamber array.The results revealed that the three types of curves agreed well with the gantry angles of 0° 60° and 300° 360°(0°).Curves and centre point dose on plane from Monte Carlo simulation differed obviously from those of MatriXX measurement in gantry angles of 70° 90° and 270° 290°.It is possible to verify the dose distribution of intensity modulated radiation therapy(IMRT) plan using the Multi-Gantry-Angle Composite(MGAC).

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