Takashi Kudo1,2, Aiganym Imakhanova3. 1. Department of Radioisotope Medicine, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki, Japan. tkudo123@nagasaki-u.ac.jp. 2. Department of Radioisotope Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan. tkudo123@nagasaki-u.ac.jp. 3. Department of Radioisotope Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.