1. Department of Diagnostic Radiology; Hokkaido University Hospital; Sapporo Japan
2. Division of UltraHigh Field MRI; Iwate Medical University; Yahaba Iwate Japan
3. Division of Bioengineering and Bioinformatics, Graduate School of Information Science and Technology; Hokkaido University; Sapporo Japan
4. Laboratory of Radiation Biology, Graduate School of Veterinary Medicine; Hokkaido University; Sapporo Japan
5. Division of Pulmonary, Allergy, Critical Care & Sleep Medicine, Department of Internal Medicine; The Ohio State University; Columbus OH USA