@misc{oai:repo.qst.go.jp:00067871,
 author = {Tsunoo, Takanori and Torikoshi, Masami and Ohno, Yumiko and Endo, Masahiro and Natsuhori, Masahiro and Kakizaki, Takehiko and Ito, Nobuhiko and Uesugi, Kentaro and Yagi, Naoto and 角尾 卓紀 and 取越 正己 and 大野 由美子 and 遠藤 真広 and 夏堀 雅宏 and 柿崎 竹彦 and 伊藤 伸彦},
 month = {Sep},
 note = {The electron density is indispensable to the treatment planning for heavy-ion radiotherapy, so that the precise measurement of that is important for advancing radiotherapy.  Usually the electron density for the radiotherapy is derived from an image based on CT number by conventional CT. CT number include ambiguilty due to the beam hardening. In a method of dual-energy x-ray CT, the information on an electron density can be obtained directly using monochromatic x-rays. The precision of the electron density was experimentally proved to be about 1%., The 8th Conference on Biology and Synchrotron Radiation},
 title = {Quantitative Measurement of Electron Density in Method of Dual-Energy X-Ray CT},
 year = {2004}
}