1. Department of Radiology, Shinshu University School of Medicine, Matsumoto, Nagano, Japan
2. Radiology Division, Shinshu University Hospital, Matsumoto, Nagano, Japan
3. MR Application Predevelopment, Siemens Healthcare GmbH, Erlangen, Germany
4. MR Research & Collaboration Department, Siemens Healthcare K.K., Tokyo, Japan