Skeletal absorbed fractions for electrons in the adult male:: Considerations of a revised 50-μm definition of the bone endosteum
Skeletal absorbed fractions for electrons in the adult male:: Considerations of a revised 50-μm definition of the bone endosteum
复制标题
DOI：
10.1093/rpd/ncm268
复制
发表时间：
2007-01-01
影响因子：
1
通讯作者：
Eckerman, K. F.
中科院分区：
文献类型：
--
作者：
Bolch, W. E.;Shah, A. P.;Eckerman, K. F.
1995年，国际放射防护委员会（ICRP）发布了ICRP第70号出版物，其中对最初在ICRP第23号出版物中发布的成人和儿童骨骼的生理和解剖学参考数据提供了广泛的更新。虽然ICRP第70号出版物是发展参考体素计算幻影的一份有价值的文件，但在ICRP第30号出版物之外，还需要对骨骼组织的剂量评估提供额外的指导。在这项研究中，提出了一种基于计算机断层扫描（CT）和微CT的骨组织模型，该模型考虑了(1)骨髓中50 μ m深度的骨祖细胞，(2)电子从海绵小梁向周围皮质骨的逃逸，(3)皮质骨到海绵小梁的电子交叉发射，以及(4)特定吸收分数随骨髓细胞结构变化的变化。给出了成年男性颅面骨电子剂量测定的代表性数据集。
In 1995, the International Commission on Radiological Protection (ICRP) issued ICRP Publication 70 which provided an extensive update to the physiological and anatomical reference data for the skeleton of adults and children originally issued in ICRP Publication 23. Although ICRP Publication 70 has been a valuable document in the development of reference voxel computational phantoms, additional guidance is needed for dose assessment in the skeletal tissues beyond that given in ICRP Publication 30. In this study, a computed tomography (CT) and micro-CT-based model of the skeletal tissues is presented, which considers (1) a 50-mu m depth in marrow for the osteoprogenitor cells, (2) electron escape from trabecular spongiosa to the surrounding cortical bone, (3) cortical bone to trabecular spongiosa cross-fire for electrons and (4) variations in specific absorbed fraction with changes in bone marrow cellularity for electrons. A representative data set is given for electron dosimetry in the craniofacial bones of the adult male.