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Proceedings Paper

Using cortical vessels for patient registration during image-guided neurosurgery: a phantom study
Author(s): Hai Sun; David W. Roberts; Alex Hartov; Kyle R. Rick; Keith D. Paulsen
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Paper Abstract

Patient registration, a key step in establishing image guidance, has to be performed in real-time after the patient is anesthetized in the operating room (OR) prior to surgery. We propose to use cortical vessels as landmarks for registering the preoperative images to the operating space. To accomplish this, we have attached a video camera to the optics of the operating microscope and acquired a pair of images by moving the scope. The stereo imaging system is calibrated to obtain both intrinsic and extrinsic camera parameters. During neurosurgery, right after opening of dura, a pair of stereo images is acquired. The 3-D locations of blood vessels are estimated via stereo vision techniques. The same series of vessels are localized in the preoperative image volume. From these 3-D coordinates, the transformation matrix between preoperative images and the operating space is estimated. Using a phantom, we have demonstrated that patient registration from cortical vessels is not only feasible but also more accurate than using conventional scalp-attached fiducials. The Fiducial Registration Error (FRE) has been reduced from 1 mm using implanted fiducials to 0.3 mm using cortical vessels. By replacing implanted fiducials with cortical features, we can automate the registration procedure and reduce invasiveness to the patient.

Paper Details

Date Published: 30 May 2003
PDF: 9 pages
Proc. SPIE 5029, Medical Imaging 2003: Visualization, Image-Guided Procedures, and Display, (30 May 2003); doi: 10.1117/12.479723
Show Author Affiliations
Hai Sun, Dartmouth College (United States)
David W. Roberts, Dartmouth Hitchcock Medical Ctr. (United States)
Norris Cotton Cancer Ctr. (United States)
Alex Hartov, Dartmouth College (United States)
Dartmouth Hitchcock Medical Ctr. (United States)
Kyle R. Rick, Darmouth College (United States)
Keith D. Paulsen, Dartmouth College (United States)
Dartmouth Hitchcock Medical Ctr. (United States)
Norris Cotton Cancer Ctr. (United States)


Published in SPIE Proceedings Vol. 5029:
Medical Imaging 2003: Visualization, Image-Guided Procedures, and Display
Robert L. Galloway, Editor(s)

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