1. Department of Radiological Technology, Tsuchiya General Hospital, Nakajima-cho 3-30, Naka-ku, Hiroshima 730-8655, Japan
2. Department of Radiological Technology, Tsuchiya General Hospital, 3-30 Nakajima-cho, Naka-ku, Hiroshima 730-8655, Japan
3. Department of Radiological Technology, Faculty of Health Science and Technology, 288 Matsushima, Kurashiki-City, Okayama 701-0193, Japan
4. Department of Radiology, NTT Medical Center Tokyo, 5-9-22 Higashi-Gotanda, Shinagawa-ku, Tokyo 141-8625, Japan
5. Department of Clinical Radiology, Hyogo College of Medicine College Hospital, 1-3-6 Minatojima, Chuo-ku, Kobe City, Hyogo 663-8501, Japan
6. Department of Radiological Technology, Faculty of Health Science, Juntendo University, 2-1-1 Hongo, bunkyou-ku, Tokyo 113-8421, Japan