1. School of Mechanical Engineering, Kyungpook National University, Daegu, South Korea
2. Department of Internal Medicine and Environmental Health Center, Kangwon National University Hospital, Chuncheon, South Korea
3. Department of Radiology, Institute of Medical Science, Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University Hospital, Jeonju, South Korea
4. Department of Radiology, Seoul National University College of Medicine, Seoul National University Hospital, Seoul, South Korea
5. Department of Radiology, College of Medicine, The University of Iowa, Iowa City, Iowa, USA
6. School of Aerospace Engineering, Huazhong University of Science and Technology, Wuhan, China