1 Department of Radiology, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima, 8908544, Japan. yoshiura@m3.kufm.kagoshima-u.ac.jp.
2 Department of Radiology, International University of Health and Welfare Narita Hospital, 852 Hatakeda, Narita, 286-0124, Japan.