Development of a Japanese Adult Female Voxel Phantom

概要

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A Japanese adult female voxel (volume pixel) phantom (JF) was developed using CT images of a healthy female volunteer. The height (152 cm) and weight (44 kg) of JF are smaller than the averages of Japanese adult female. The voxel size of JF is 0.98×0.98×1 mm3. Therefore, the shapes of small or complicated organs, such as thyroid and stomach, are distinctly reproduced. The shapes of female-specific organs, such as ovary and uterus, in JF are also realistically represented compared with those of a previously developed phantom. These results suggest that JF enables the accurate evaluation of organ doses due to diverse exposures to Japanese adult females. Photon-specific absorbed fractions (SAFs) for liver or stomach as target organs and for kidney as a source organ were calculated using JF and compared with those of other phantoms. It was concluded that the SAFs calculated using JF and other phantoms depend on the organ distances from source to target.
社団法人日本原子力学会の論文
2009-09-01