1. Department of Radiology; Tokai University Hospital; Isehara Kanagawa Japan
2. Division of Health Sciences, Graduate School of Medical Sciences; Kanazawa University; Kanazawa Ishikawa Japan
3. Department of Radiology; Gifu prefectual Tajimi Hospital; Tajimi Gifu Japan
4. Department of Radiology; Tokai University School of Medicine; Isehara Kanagawa Japan
5. Philips Electronics Japan, Healthcare; Shinagawa Tokyo Japan