1. Department of Radiology, Jichi Medical University Saitama Medical Center, Saitama 330-8503, Japan
2. Department of Radiology, Jichi Medical University, Tochigi 329-0498, Japan
3. QST Hospital, National Institutes for Quantum and Radiological Science and Technology, Chiba 263-8555, Japan
4. Department of Radiation Oncology, Saitama Medical Center, Saitama Medical University, Saitama 350-8550, Japan
5. Division of Hematology, Department of Medicine, Jichi Medical University, Tochigi 350-8550, Japan
6. Division of Hematology, Jichi Medical University Saitama Medical Center, Saitama 330-8503, Japan