Changde He received the B.S. degree in electrical and electronic engineering from Hefei University of Technology, Hefei, China, and the M.E. degree and the Ph.D. degree in electrical and electronic engineering from Peking University, Beijing, China. Since 2003, he has been with the North University of China (NUC), Taiyuan, China, where he is currently a teacher and researcher with the School of Instrument and Electronics. His current research areas include CMUT device and 3D ultrasound imaging technology.