1. From the Departments of Radiology (K.O., H.K.) and Pathology (S.H.), Faculty of Medical Sciences, University of Fukui, 23-3 Matsuoka-Shimoaizuki, Eiheiji, Fukui 910-1193, Japan; and Department of Radiology, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan (T.G.).