^○Fumiyuki Yamasaki, Manish Kolakshyapati, Vega Karlowee, Takeshi Takayasu, Yuji Akiyama, Kazuhiko Sugiyama, Kaoru Kurisu (Hiroshima University Hospital)

^○Hiroyuki Uetani¹, Mika Kitajima¹, Hideo Nakamura², Tetsuya Yoneda³, Kosuke Morita⁴, Yasuyuki Yamashita¹ (1.Department of Diagnostic Radiology, Graduate School of Medical Sciences, Kumamoto University, 2.Department of Neurosurgery, Graduate School of Medical Sciences, Kumamoto University, 3.Department of Medical Physics in Advanced Biomedical Sciences, Faculty of Life Sciences, Kumamoto University, 4.Department of Radiology, Kumamoto University Hospital)

^○Du Xuesong (Department of Radiology, Daping Hospital, The Third Military Medical Univerisity)

^○Du Xuesong (Department of Radiology, Daping Hospital, The Third Military Medical Univerisity)

^○Hsiu-Ling Chen¹, Koji Sakai², Wei-Che Lin¹, Kei Yamada² (1.Department of Diagnostic Radiology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, 2.Department of Radiology, Kyoto Prefectural University Graduate School of Medicine)

Mari Miyata¹, ^○Shingo Kakeda¹, Kazumasa Okada², Hiroaki Adachi², Hiroyuki Kabasawa³, Atsushi Nozaki³, Yukunori Korogi¹ (1.Department of Radiology, University of Occupational and Environmental Health, 2.Department of Neurology, University of Occupational and Environmental Health, 3.GE healthcare Japan)