1. University of Posts and Telecommunications,Department of Biomedical Engineering of the School of Bioinformatics,Chongqing,China,400065
2. Hebei General Hospital,Department of Neurology,Shijiazhuang,China,050000
3. Hebei General Hospital,Department of Radiology,Shijiazhuang,China,050000
4. University of Pennsylvania,Perelman School of Medicine,Department of Radiology,Philadelphia,PA,USA,19104