@misc{oai:repo.qst.go.jp:00062001,
 author = {Satoh, Daiki and Endo, Akira and Ohmachi, Yasushi and Miyahara, Nobuyuki and et.al and 遠藤 章 and 大町 康 and 宮原 信幸},
 month = {Nov},
 note = {Neutrons are generally more effective radiation than X and  rays for induction of neoplasm, and for most other late somatic effects of radiation. In the investigation of the neutron effects for human, it is inevitable to rely on the results obtained from experimental animals (mice and rats etc.), because there is no useful epidemiological data for human. However, there remains the common problem that exists with all data obtained from small animals; the radiation field at the target tissue is quite different in mouse and human, even if the subjects are exposed with an identical radiation field. In order to develop an appropriate method to assess the neutron effects for human from experimental data of small animals, it is very important to understand the behavior of the radiations inside the subjects.
The present study intends to analyze internal radiation field of a typical mouse with volume-pixel (voxel) phantom and radiation transport code. A mouse was imaged by using the dedicated small-animal CT scanner, in which slice pitch was set at 0.1 mm. Each image with the resolution of 0.02 mm was segmented to construct a voxel phantom by using computer tools (JCDS1)), which have been applied to process human-head images for 3-dimensional dosimetry in Boron Neutron Capture Therapy at the Japan Atomic Energy Agency. Input files for the Particle and Heavy Ion Transport code System (PHITS2)) were prepared from the constructed 3-dimensional voxel-based image data. Absorbed dose distributions and LET spectra in the mouse body were calculated by PHITS on the segmented images., The 4th JAEA-EPA Workshop on Radiation Risk Assessment},
 title = {Simulation Analysis of Radiation Fields inside Phantoms for Neutron Irradiation},
 year = {2006}
}