1. School of Mechanical Engineering, Gyeongsang National University, Jinju, Korea.
2. Department of Mechanical Engineering, Soongsil University, Seoul, Korea.
3. Center for Bionics, Korea Institute of Science and Technology, Seoul, Korea.
4. Department of Radiology, Seoul National University Boramae Hospital, Seoul, Korea.
5. Department of Radiology, Hiroshima University Hospital, Hiroshima, Japan.