Abstract
According to the Report 103 of the International Commission on Radiological Protection (ICRP) the hematopoietic cells of the red bone marrow and the osteogenic cells are the most radiosensitive tissues, there is the likelihood of leukemia induct ion and/or bone cancer. The Grupo de Dosimetria Computacional e Sistemas Embarcados (GPDC&SE) from Recife, has been used Exposute Computational Models (ECM), composed by the MASH phantom (Male Adult MeSH) from DEN/UFPE coupled to the EGSnrc Monte Carlo code. For skeletal dosimetry evaluations microCT images blocks of regions of trabecular bones (TB) of the skull, pelvis, femur, vertebrae and sternum are used. The structure composed by coarse salt crystals (CS) disposed on an acrylic box defines an architecture which resembles the cancellous trabecular tissue of human bones, being the primary object to obtain CT images stacks for a representation of trabecular bone in an ECM. This work aims to identify the possibility of replacing five samples of real bones by their CS blocks with equal dimensions in MCES that differ only in the representation of TBs. For comparisons, the linear correlation coefficients of the absorbed doses by accumulated activity and the analysis of the coefficients of variance were considered. They were estimated using the EGSnrc monte carlo code with the trabecular bone, the red bone marrow and also the cells of the bone surfaces in the five regions as target organs. The thyroid was the organ source.