1. Department of Diagnostic Imaging, The Cancer Institute Hospital of the Japanese Foundation for Cancer Research, Tokyo, Japan
2. Department of Radiology, Kanazawa University Graduate School of Medical Sciences, 13-1, Takara-machi, Kanazawa, Ishikawa, 920-8640, Japan
3. Department of Diagnostic Radiology and Nuclear Medicine, Graduate School of Medicine, Tokyo Medical and Dental University Hospital, Tokyo, Japan
4. Department of Gastroenterology, The Cancer Institute Hospital of the Japanese Foundation for Cancer Research, Tokyo, Japan
5. Department of Radiology, Kanazawa University Hospital, Ishikawa, Japan