Masashi Kameyama^1,2, Kiyotaka Watanabe³ (1.Department of Diagnostic Radiology, Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology, Tokyo, Japan, 2.Department of Diagnostic Radiology, School of Medicine, Keio University, Tokyo, Japan, 3.Nihon Medi-Physics Co., Ltd., Tokyo, Japan)

Takeshi Nojo¹, Shinichi Inoh¹, Nobuo Tomizawa¹, Kodai Yamamoto¹, Yosinobu Sekihara², Norihiro Ishii², Sunao Nakamura³ (1.Department of Radiology, New Tokyo Hospital, Chiba, Japan, 2.Department of Neurosurgery, New Tokyo Hospital, Chiba, Japan, 3.Department of Cardiology, New Tokyo Hospital, Chiba, Japan)

Kazumasa Ootomo, Hidenori Endou (Kohnan hospital)

Iichiro Osawa¹, Takashi Ushimi¹, Haraikawa Mayuko¹, Tsuchihashi Saki¹, Hara Yuki¹, Okano Nanami¹, Inoue Kaiji¹, Kozawa Eito¹, Tanaka Junji¹, Niitsu Mamoru¹, Matsunari Ichiro² (1.Department of Radiology, Saitama Medical University Hospital, Saitama, Japan, 2.Division of Nuclear Medicine, Department of Radiology, Saitama Medical University Hospital, Saitama, Japan)

Tomomi Ikari¹, Yusuke Inoue¹, Toshimasa Hara¹, Keita Takahashi², Hiroki Miyatake², Yutaka Abe² (1.Department of Diagnostic Radiology, Kitasato University School of Medicine, Sagamihara, Japan, 2.Department of Radiology, Kitasato University Hospital, Sagamihara, Japan)

Miwako Takahashi¹, Eiji Yoshida¹, Hideaki Tashima¹, Go Akamatsu¹, Yuma Iwao¹, Taichi Yamashita², Taiga Yamaya¹ (1.Department of Radiation Measurement and Dose Assessment, National Institute of Radiological Sciences, 2.ATOX Co., Ltd.)

Tomohiro Yamaki¹, Itou Daisuke¹, Oka Nobuo^1,2, Odaki Masaru¹, Shigeki Kobayashi¹ (1.Division of Neurosurgery, Rehabilitation Center for Traumatic Apallics Chiba, National Agency for Automotive Safety and Victims Aid, Chiba, Japan, 2.Division of PET imaging, Rehabilitation Center for Traumatic Apallics Chiba, National Agency for Automotive Safety and Victims Aid, Chiba, Japan)