1. Department of Radiology, Taichung Veterans General Hospital, Taichung 407, Taiwan.
2. Section of Pediatric Cardiology, Department of Pediatrics, Taichung Veterans General Hospital, Taichung 407, Taiwan.
3. Section of Cardiovascular Surgery, Cardiovascular Center, Taichung Veterans General Hospital, Taichung 407, Taiwan.
4. Department of Medical Imaging, Show Chwan Memorial Hospital and Chang Bing Show Chwan Memorial Hospital, Changhua 500, Taiwan.
5. Department of Radiological Technology and Graduate Institute of Radiological Science, Central Taiwan University of Science and Technology, Taichung 406, Taiwan.