1. Department of Medical Technology, Tokyo Women’s Medical University Yachiyo Medical Center, Yachiyo, Japan
2. Division of Health Sciences, Graduate School of Medical Science, Kanazawa University, Kodatsuno, Kanazawa, Ishikawa, Japan
3. Department of Radiological Technology, Tokushima Bunri University, Kagawa, Japan
4. Department of Radiological Service, The University of Tokyo Hospital, Tokyo, Japan
5. Department of gastroenterological medicine, Tokyo Women’s Medical University Yachiyo Medical Center, Yachiyo, Japan