Affiliation: | (1) Department of Radiology, Osaka City University Medical School, 1-5-7 Asahimachi, Abeno, Osaka 545-8585, Japan Tel.: 81-6-66 45 38 31 Fax: 81-6-66 44 66 55, JP;(2) Department of Neurosurgery, Osaka City University Medical School, 1-5-7 Asahimachi, Abeno, Osaka 545-0051, Japan, JP |