| 宾石珍,邱小平,杨振,吕知平.肺介质中光子剂量算法在不同能量下的计算精度差异[J].南华大学学报(自然科学版),2011,25(2):6~9.[BIN Shi-zhen1,QIU Xiao-ping1,YANG Zhen2,LV Zhi-ping2.Difference of the Calculation Accuracy by Various Photon DoseAlgorithms Under Different Energy in Lung Density Media[J].Journal of University of South China(Science and Technology),2011,25(2):6~9.] |
| 肺介质中光子剂量算法在不同能量下的计算精度差异 |
| Difference of the Calculation Accuracy by Various Photon DoseAlgorithms Under Different Energy in Lung Density Media |
| 投稿时间：2011-04-22 |
| DOI： |
| 中文关键词: 笔形束算法 卷积叠加算法 蒙特卡罗模拟 计算精度 |
| 英文关键词:pencil beam algorithm convolution-superposition algorithm monte carlo simulation calculation accuracy |
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| 摘要点击次数: 859 |
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| 中文摘要: |
| 建立一包含肺介质的水模体，分别用笔形束(Pencil Beam,PB)算法、卷积叠加(Convolution-superposition,CS)算法和蒙特卡罗(Monte Carlo,MC)模拟计算1 cm×1 cm到7 cm×7 cm射野条件下，6 MV和15 MV光子在该模体中的百分深度剂量和离轴比，并以MC模拟为标准比较其计算误差.结果表明肺介质中，笔形束算法计算精度总体上随能量的增加降低，卷积叠加算法计算精度受能量影响不大. |
| 英文摘要: |
| A water phantom with a lung density slab was built,in which the depth dose(DD)and off-axis ratio(OAR)of field 1 cm×1 cm to field 7 cm×7 cm were calculated by PB algorithms、CS algorithms and Monte Carlo(MC)simulation under 6 MV and 15 MV photon,and their calculation error were evaluated by the standard of MC simulated results.The results show that in lung density media,the calculation accuracy of PB algorithms increases with the energy reduction as a whole in lung density media.The CS algorithm accuracy has little effect by the energy. |
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