〇Yuko ICHIYANAGI^2,5, Kouhei Kanda¹, Taisei Taisei², koki Fujiwara², Akito Oshima², Yosiyuki Hosokai³, Akihito Usui⁴ (1.Dept. of Nat. Env., Grad. Sch. of Env. and Inf. Sci., Yokohama Nat. Univ., 2.Dept. of Phys., Grad. Sch. of Eng., Yokohama Nat. Univ., 3.Dept. of Rad. Sci., Int. Univ. of Health and Welfare, 4.Grad. Sch. of med., Tohoku Univ., 5.RCST, Grad. Sch. of Sci., Osaka Univ.)