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Proceedings Paper

Extracting displacement data from coregistered ultrasound for brain modeling
Author(s): Karen E. Lunn; Alex Hartov; David W. Roberts; Hai Sun; Keith D. Paulsen
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Paper Abstract

Image guided neurosurgery systems rely on rigid registration of the brain to preoperative images, not taking into account the displacement of brain tissue during surgery. Co-registered ultrasound appears to be a promising means of detecting tissue shift in the operating room. Although the use of ultrasound images alone may be insufficient for adequately describing intraoperative brain deformation, they could be used in conjunction with a computational model to predict full volume deformation. We rigorously test the assumption that co-registered ultrasound is an accurate source of sparse displacement data. Our co-registered ultrasound system is studied in both clinical applications as well as in a series of porcine experiments. Qualitative analysis of patient data indicates that ultrasound correctly depicts displaced tissue. The porcine studies demonstrate that features from co-registered ultrasound and CT or MR images are properly aligned to within approximately 1.7 mm. Tissue tracking in pigs suggests that the magnitude of displaced tissue may be more accurately predicted than the actual location of features. We conclude that co-registered ultrasound is capable of detecting brain tissue shift, and that incorporating displacement data into computational model appears feasible.

Paper Details

Date Published: 17 May 2002
PDF: 9 pages
Proc. SPIE 4681, Medical Imaging 2002: Visualization, Image-Guided Procedures, and Display, (17 May 2002); doi: 10.1117/12.466945
Show Author Affiliations
Karen E. Lunn, Dartmouth College (United States)
Alex Hartov, Dartmouth College and Dartmouth Hitchcock Medical Ctr. (United States)
David W. Roberts, Dartmouth Hitchcock Medical Ctr. and Norris Cotton Cancer Ctr. (United States)
Hai Sun, Dartmouth College (United States)
Keith D. Paulsen, Dartmouth College and Darthmouth Hitchcock Medical Ctr. and Norris Cotton Cancer Ctr. (United States)

Published in SPIE Proceedings Vol. 4681:
Medical Imaging 2002: Visualization, Image-Guided Procedures, and Display
Seong Ki Mun, Editor(s)

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