1. Department of Radiology Tokai University Hachioji Hospital, Tokai University School of Medicine Tokyo Japan
2. Department of Respiratory Medicine Tokai University Hachioji Hospital, Tokai University School of Medicine Tokyo Japan
3. Department of Radiological Technology Tokai University Hachioji Hospital, Tokai University School of Medicine Tokyo Japan
4. Department of Radiology Kochi University, Kochi Medical School Nankoku Kochi Japan