Keynote Talk: Integration of 3D Intraoperative Ultrasound for Enhanced Neuronavigation
True three-dimensional (3D) volumetric ultrasound (US) acquisitions stand to benefit intraoperative neuronavigation on multiple fronts. While traditional two-dimensional (2D) US and its tracked, hand-swept version have been recognized for many years to advantage significantly image-guided neurosurgery, especially when coregistered with preoperative MR scans, its unregulated and incomplete sampling of the surgical volume of interest have limited certain intraoperative uses of the information that are overcome through direct volume acquisition (i.e, through 2D scan-head transducer arrays). In this presentation, we will illustrate several of these advantages, including fiducial-less, image-based intraoperative registration (and re-registration) and automated, volumetric displacement mapping for intraoperative image updating.
These applications of 3D US are enabled by algorithmic advances in US image calibration, and volume rasterization and interpolation for multi-acquisition synthesis that will also be highlighted. Coregistered 3D US is well worth incorporating into the standard neurosurgical navigational environment relative to traditional tracked, hand-swept 2D US.
Keith D. Paulsen, Ph.D. is the Robert A. Pritzker Chair in Biomedical Engineering at the Thayer School of Engineering at Dartmouth, Professor of Radiology at Dartmouth Medical School, Director of the Advanced Imaging Center at Dartmouth Hitchcock Medical Center, Scientific Director of the Advanced Surgical Center also at Dartmouth Hitchcock, Associate Director of Translational Programs for SYNERGY, Dartmouth's Center for Clinical and Translational Science, and Co-Director of the Cancer Imaging and Radiobiology Research Program at the Norris Cotton Cancer Center. His research specializes in cancer imaging and image-guidance techniques in the breast and brain. Dr. Paulsen has published over 275 articles in the peer-reviewed scientific and medical literature and has received numerous awards for funding his research from the National Institutes of Health.