Recently, there has been a burgeoning interest in the use of image-guided n
avigation to improve the safety and effectiveness of neurosurgical procedur
es. The intraoperative use of magnetic resonance imaging (MRI) provides the
most accurate guidance available. This report discusses the hardware and s
oftware improvements that have made intraoperative AM a reality and describ
es the use of this technology for neurosurgical intraoperative guidance. (C
) 2000 Wiley-Liss, Inc.