作者单位:Nanchang Univ, Dept Elect Informat Engn, Nanchang 330031, Peoples R China[1]Univ Buffalo State Univ New York, Dept Biomed Engn, Buffalo, NY 14260 USA[2]Chinese Acad Sci, Shenzhen Inst Adv Technol, Paul C Lauterbur Res Ctr Biomed Imaging, Shenzhen[3]