基于CT值的组织辐射等效材料设计方法

摘要

A design method based on the CT number for the radiation tissue-equivalent materials was brought up.According to the relationship between the CT number and the element content of radiation tissue-equivalent materials,a mathematic model was founded to calculate the mass ratio of the radiation tissue-equivalent materials under a determination energy of the rays(X or γ ray).The radiation tissue-equivalent materials with similar CT number of human body were designed.The mass attenuation coefficients of the radiation tissue-equivalent materials were compared to it of the body tissues.The results declared that this design method was feasible.The method provided in this paper processed some theoretical value to guide the design of the radiation tissue-equivalent materials under the energy used for medicine and the design of aerospace false.%　　提供一种基于 CT 值设计组织辐射等效材料的方法。根据 CT 值与组织辐射等效材料元素组分的内在联系，建立在一定射线(X 或γ射线)能量的照射下计算人体组织辐射等效材料质量配比的数学模型，设计具有与人体组织相同 CT 值的组织辐射等效材料。通过比较组织辐射等效材料与相应人体组织的质量衰减系数，说明该方法可行。论文提供的设计方法对医疗照射能量下组织辐射等效材料的设计以及航空航天假人的研制具有一定的理论指导价值。