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    6. 组织辐射等效材料等效性验证方法的探讨

    2006-04-11 《中国测试技术》杂志社csjs

    张加易,袁中凡,林大全,杨家鉴 (四川大学,四川 成都 610065)   摘要:组织等效材料是设计、制造和应用仿真辐照人体模型的技术关键,要做到X-射线在辐照体模内与活体散射、吸收和分布的相似性以满足材料的组织等效性的要求,因此对组织等效材料的宏观、中观、微观三个层次上表征就显得极其重要。根据“参考人”的各组织器官密度和元素组成可以算出人体各种组织有效原子序数,电子密度和质量衰减系数等,用于判断和检验组织等效材料的辐射等效性。   关键词:仿真辐照体模;组织等效材料;有效原子序数;质量衰减系数   中图分类号:TL84 文献标识码:A 文章编号:1672-4984(2006)02-0024-03   Validate methodology probing of equivalent of tissue-equivalent materials   ZHANG Jia-yi,YUAN Zhong-fan,LIN Da-quan,YANG Jia-jian (Sichuan University,Chengdu 610065,China)   Abstract: Design of tissue-equivalent materials is a key to design Anthropomorphic Radiant Phantom. To attain to X-ray’s similarity inner in the general request, it is used that the equivalent material of the availably atomic number and the electron density is similar to the body organ. So the research on the three aspects (the macroscopic, microscopic and medium) of the equivalent materials seems to be the very importance. According to organism density and the chemical element component from “consult person”, we can calculate with organizes’availably atomic ordinal number, the electron density and the quantity attenuation coefficient, etc. It is in favor of which makes the equivalent materials be similar to organism in X-ray’s scatter, absorption and attenuation   Key words:Anthropomorphic radiant phantom;Tissue-equivalent materials;Availably atomic number;Quantity attenuation coefficient


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