1. Laboratory of Image Science and Technology and the Key Laboratory of Computer Network and Information Integration, Southeast University, Nanjing, China
2. Xingaoyi Medical Equipment Company Ltd., Yuyao, China
3. Department of Electronic Information Engineering, Nanchang University, Nanchang, China
4. Jiangsu Provincial Joint International Research Laboratory of Medical Information Processing and the Laboratory of Image Science and Technology, School of Computer Science and Engineering, Southeast University, Nanjing, China