1. Department of Radiology, Research Institute of Radiological Science, Severance Hospital, Yonsei University College of Medicine, Seoul 120-752, Korea.
2. Department of Orthopedic Surgery, Severance Hospital, Yonsei University College of Medicine, Seoul 120-752, Korea.
3. Department of Radiology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul 135-720, Korea.
4. GE Healthcare, Seoul 135-820, Korea.