Affiliation: | (1) Department of Radiology, Asahikawa Medical College, 4-5-3-11 Nishikagura, Asahikawa, Japan 078-8510, JP;(2) Department of Radiology, Saiseikai Utunomiya Hospital, 911-1 Takebayashi, Tochigi, Japan 321, JP;(3) Department of Radiology, Takagi Hospital, 141-11 Sakami, Ohkawa, Japan 831-0016, JP;(4) Department of Radiology, Jichi Medical School and Hospital, 3311-1 Yakushiji, Minamikawachi, Tochigi, Japan 329-0498, JP |