1. School of Electrical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Korea.
2. Department of Radiology, SMG-SNU Boramae Medical Center, Seoul, Korea.
3. Department of Radiology, Seoul National University Hospital, Seoul, Korea.
4. Division of Cardiology, Department of Internal Medicine, SMG-SNU Boramae Medical Center, Seoul National University College of Medicine, Seoul, Korea.
5. Medical Research Collaborating Center, Seoul National University Boramae Medical Center, Seoul, Korea.