| 高剂量率铱-192微型源在水模中的剂量分布计算 |
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| 引用本文： | 程品晶,宦琰,凌球.高剂量率铱-192微型源在水模中的剂量分布计算[J].核电子学与探测技术,2007,27(6):1132-1134. |
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| 作者姓名： | 程品晶 宦琰 凌球 |
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| 作者单位： | 南华大学核科学技术学院,湖南,衡阳,421001 |
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| 摘 要： | 根据核通公司提供的高剂量率(HDR)微型铱源(Ir-192)的结构,计算其在水模体中的剂量分布情况,为后装治疗中的物理剂量优化提供数据.方法是采用蒙特卡罗程序(EGSnrc)计算源中垂轴上(径向)的剂量分布和中心轴方向紧靠不锈钢外壳处的剂量分布.计算结果表明源中垂轴上剂量随离轴距离的增加递减,中垂轴外的剂量分布呈各项异性,不锈钢外壳对剂量计算的影响可以忽略.
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| 关 键 词： | 铱源 蒙特卡罗方法 水模 剂量分布 |
| 文章编号： | 0258-0934（2007）06-1132-03 |
| 收稿时间： | 2007-06-18 |
| 修稿时间： | 2007年6月18日 |
Calculation on the Dose Distribution in Water Phantom of High-dose-rate Iridium-192 |
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| CHENG Pin-jing,HUAN Yan,LING Qiu.Calculation on the Dose Distribution in Water Phantom of High-dose-rate Iridium-192[J].Nuclear Electronics & Detection Technology,2007,27(6):1132-1134. |
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| Authors: | CHENG Pin-jing HUAN Yan LING Qiu |
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| Abstract: | To provide the dose data needed for optimizing treatment in afterloading therapy, the dose distribution was calculated in water phantom for high-dose-rate iridiurn-192 with Monte Carlo approach based the Ir source structure of Nucletron Corporation. The code EGSnrc was used when the dose was calculated at the outside of stainless steel shell along the perpendicular and the central axis. The results show that the dose along the perpendicular becomes lower with the rising of distance to the steel shell, the dose beyond the perpendicular appears anisotropy and the impact of steel shell on the calculation of dose can be ignored. |
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| Keywords: | Iridiurn-192 source Monte Carlo Approach Water Phantom Dose Distribution |
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