FIG. 1.

Top: MRI-compatible stereotactic aiming device and cannula. SmartFrame stereotactic aiming device includes a skull-mounted holder for the infusion cannula and controls that permit adjustment of the trajectory while the patient is in the MR bore. Planning and intraoperative adjustment are accomplished with the aim of ClearPoint software as described in more detail by Richardson and colleagues (2011a). Bottom: The SmartFlow MRI-compatible cannula. The step in the outer dimensions prevents infusate reflux. Color images available online at www.liebertonline.com/hum