Affiliation: | 1. Department of Diagnostic Radiology, Amakusa Regional Medical Center, , Kumamoto, Japan;2. Department of Diagnostic Radiology, Faculty of Life Sciences, Kumamoto University, , Kumamoto, Japan;3. Department of Surgery, Amakusa Regional Medical Center, , Kumamoto, Japan;4. Department of Neurosurgery, Amakusa Regional Medical Center, , Kumamoto, Japan |