1. MD, Department of Radiology, National Hospital Organization Nagasaki Medical Center, 2-1001-1 Kubara, Omura, Nagasaki 856-0835, Japan
2. Professor, Department of Clinical Oncology, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan
3. MD, Department of Radiology, Sasebo City General Hospital, Hirase 9-3, Sasebo, Nagasaki 857-8511, Japan