1. North China University of Technology, School of Electrical Information, Beijing, China
2. School of Software Engineering, Beihang University, Beijing, China
3. Department of Engineering Science and Physics, City University of New York at CSI, Staten Island, NY, USA
4. Department of Biomedical, Northeast University, Shenyan, China
5. Department of Radiology, State University of New York at Stony Brook, NY, USA