1 Division of Neurosurgery (CRP, VXDY), Department of Surgery, University of Toronto, Toronto, Ontario, Canada; Division of Neurosurgery (LdC, VXDY), Sunnybrook Hospital, University of Toronto, Toronto, Ontario, Canada; Division of Neuroradiology (VMP), Department of Medical Imaging, Toronto Western Hospital, University Health Network, Toronto, Ontario, Canada; Sunnybrook Health Sciences Centre (JR, YD, VXDY), Toronto, Ontario, Canada; and Ryerson University (VXDY), Bioengineering and Biophotonics Laboratory, Toronto, Ontario, Canada.