Institution: | 1. Diagnostic Radiology, Amakusa Medical Center, Amakusa, Japan;2. Department of Diagnostic Radiology, Graduate School of Medical Sciences, Kumamoto University, Honjo, Kumamoto, Japan;3. Department of Digestive Tract Internal Medicine, Amakusa Medical Center, Amakusa, Japan;4. Department of Surgery, Amakusa Medical Center, Amakusa, Japan |