1. Department of Biomedical Imaging and Radiological Sciences, National Yang-Ming University, Taipei 11221, Taiwan
2. Division of Neurosurgery, Cheng Hsin General Hospital, Taipei 11221, Taiwan
3. Electrical and Communications Engineering, Feng Chia University, Taichung 407301, Taiwan
4. School of Medicine, National Yang-Ming University, Taipei 11221, Taiwan