張加易，袁中凡，林大全，楊家鑒 (四川大學，四川 成都 610065)   摘要：組織等效材料是設(shè)計、制造和應用仿真輻照人體模型的技術(shù)關(guān)鍵，要做到X-射線在輻照體模內(nèi)與活體散射、吸收和分布的相似性以滿足材料的組織等效性的要求，因此對組織等效材料的宏觀、中觀、微觀三個層次上表征就顯得極其重要。根據(jù)“參考人”的各組織器官密度和元素組成可以算出人體各種組織有效原子序數(shù)，電子密度和質(zhì)量衰減系數(shù)等，用于判斷和檢驗組織等效材料的輻射等效性。   關(guān)鍵詞：仿真輻照體模；組織等效材料；有效原子序數(shù)；質(zhì)量衰減系數(shù)   中圖分類號：TL84 文獻標識碼：A 文章編號：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