1. School of Life Science and Technology, Xidian University , Xi'an 710126 , China
2. School of Biomedical Engineering, Medical School, Shenzhen University , Shenzhen 518060 , China
3. Guangdong Provincial Key Laboratory of Biomedical Measurements and Ultrasound Imaging, Shenzhen University , Shenzhen 518060 , China
4. Department of Radiology, Xijing Hospital, Fourth Military Medical University , Xi'an 710032 , China
5. Inner Mongolia Key Laboratory of Pattern Recognition and Intelligent Image Processing, School of Information Engineering, Inner Mongolia University of Science and Technology , Baotou 014010 , China
6. Engineering Research Center of Molecular and Neuro Imaging Ministry of Education, Xidian University , Xi'an 710126 , China
7. Xi'an Key Laboratory of Intelligent Sensing and Regulation of trans-Scale Life Information, School of Life Science and Technology, Xidian University , Xi'an 710126 , China