目的 :在诊断核医学中 ,需要估算所用放射性药物的有效剂量对骨内膜的辐射吸收剂量 ,因为骨髓腔内的造血细胞具有很高的辐射敏感性 ,红骨髓通常也就成为剂量限制的主要器官。已经报告了 2、3维电子传输模型 ,分别对小梁骨和皮质骨的骨内膜和骨髓的吸收分数进行了估算。现把此计 OBJECTIVES: In diagnostic nuclear medicine, the dose of radiation to the endosteal needed to estimate the effective dose of the radiopharmaceutical used, since red blood cells are often predominantly dose limiting, because of the high radiosensitivity of hematopoietic cells in the marrow organ. The 2,3-dimensional electron transport model has been reported and the endocervage and bone marrow absorption fractions of trabecular and cortical bone, respectively, have been estimated. Now this plan