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Radiation Protection Dosimetry Advance Access published online on August 12, 2006
Radiation Protection Dosimetry, doi:10.1093/rpd/ncl101
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© The Author 2006. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org
Received October 2, 2005
Revised June 12, 2006
Accepted June 25, 2006

SCIENTIFIC AND TECHNICAL PAPER

JAPANESE ADULT MALE VOXEL PHANTOM CONSTRUCTED ON THE BASIS OF CT IMAGES

K. Sato 1 *, H. Noguchi 1, Y. Emoto 2, S. Koga 2, and K. Saito 1

1 Tokai Research Establishment, Japan Atomic Energy Research Institute, 2-4 Shirakata-Shirane, Tokai-mura, Naka-gun, Ibaraki-ken 319-1195, Japan
2 Fujita Health University, School of Medicine, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake-shi, Aichi-ken 470-1192, Japan

* To whom correspondence should be addressed.
K. Sato, E-mail: sato.kaoru{at}jaea.go.jp


  Abstract

A Japanese adult male voxel (volume pixel) phantom (hereinafter referred to as the JM phantom) was constructed on the basis of CT images of a healthy Japanese adult male volunteer. Body characteristics of the JM phantom were compared with those of a voxelised MIRD5 type phantom and a Japanese adult male voxel phantom which was previously developed. The voxel size of the JM phantom is 0.98 x 0.98 x 1 mm3. The shapes of the organs of the JM phantom, even for small or complicated organs, such as thyroid and stomach, are more realistically reproduced as compared with the previous Japanese voxel phantom (voxel size: 0.98 x 0.98 x 10 mm3). Photon self-absorbed fractions (self-AFs) for brain, kidneys, spleen, pancreas, thyroid and urinary bladder wall of JM were evaluated and were compared with those of the other phantoms. In consequence, it was suggested that the mass, shape and thickness of organs are important factors for the determination of self-AFs.


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