1. Department of Radiology, Nanjing First Hospital, Nanjing Medical University , Nanjing 210006 , China
2. Department of Radiology, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School , Nanjing 210008 , China
3. Department of Neurosurgery, Shanghai Sixth People’s Hospital Affiliated to Shanghai Jiao Tong University School of Medicine , Shanghai 200235 , China