1. Department of Radiology; Korea University Anam Hospital, Korea University College of Medicine; Seoul Korea
2. Department of Radiology; Korea University Ansan Hospital, Korea University College of Medicine; Ansan Korea
3. Department of Radiology; Korea University Guro Hospital, Korea University College of Medicine; Seoul Korea
4. Department of Oncology; Korea University Anam Hospital, Korea University College of Medicine; Seoul Korea
5. Siemens Healthcare; Seoul Korea
6. Siemens Healthcare; Erlangen Germany