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※ 半角英数字
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Comparison of photon and electron absorbed fractions in voxel-based and simplified phantoms for small animals

小動物におけるボクセルファントムと単純ファントムでの光子及び電子吸収割合の比較

Mohammadi, A.; 木名瀬 栄  ; 斎藤 公明 

Mohammadi, A.; Kinase, Sakae; Saito, Kimiaki

ICRP proposed the reference animals and plants using simplified phantoms, such as ellipsoids and spheres, and assessed absorbed fractions (AFs) for the whole bodies. In this study, photon and electron AFs in whole body of voxel-based frog and mouse phantoms were evaluated and compared with AFs in simplified phantoms. The evaluations were done by Monte Carlo methods for voxel-based and simplified phantoms. There were very small differences (less than 2%) between whole-body AFs in voxel-based and simplified mouse phantoms however the differences were up to 24% for the voxel-based and the Reference Frog phantoms. Whole-body AFs in voxel-based and simplified phantoms demonstrated that not only mass but also shape of whole body effected on AFs significantly. The results of this study suggest the replacement of the Reference Animal phantoms by voxel-based animal phantoms to improve the accuracy of the whole-body AFs.

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