1. Department of Radiology, Taipei Veterans General Hospital, Taipei, Taiwan, ROC
2. School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan, ROC
3. Institute of Clinical Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan, ROC
4. Department of Neurology, Neurological Institute, Taipei Veterans General Hospital, Taipei, Taiwan, ROC
5. Department of Biomedical Engineering, Yuanpei University of Medical Technology, Hsinchu, Taiwan, ROC