1. Department of Biomedical Engineering, Kyungpook National University, Daegu, Republic of Korea;
2. Department of Radiology, Kyungpook National University & Hospital, Daegu, Republic of Korea;
3. Department of Radiology, Catholic University of Daegu Medical Center, Daegu, Republic of Korea;
4. Department of Radiology, Dong-A University College of Medicine, Busan, Republic of Korea;
5. Department of Biomedical Engineering, Mercer University, Macon, GA, USA