1. From the Department of Radiology, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul 03080, Korea (J.H.Y., J.M.L., H.J.K., S.J.A., H.Y., J.K.H.); Department of Radiology, Seoul National University College of Medicine, Seoul, Korea (J.H.Y., J.M.L., H.J.K., S.J.A., H.Y., J.K.H.); Institute of Radiation Medicine, Seoul National University Medical Research Center, Seoul, Korea (J.M.L.); Philips Healthcare Korea, Seoul, Korea (E.K.); and Philips Healthcare Japan, Tokyo, Japan (T.O.).