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Proceedings Paper

Active illumination based 3D surface reconstruction and registration for image guided medialization laryngoplasty
Author(s): Ge Jin; Sang-Joon Lee; James K. Hahn; Steven Bielamowicz; Rajat Mittal; Raymond Walsh
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Paper Abstract

The medialization laryngoplasty is a surgical procedure to improve the voice function of the patient with vocal fold paresis and paralysis. An image guided system for the medialization laryngoplasty will help the surgeons to accurately place the implant and thus reduce the failure rates of the surgery. One of the fundamental challenges in image guided system is to accurately register the preoperative radiological data to the intraoperative anatomical structure of the patient. In this paper, we present a combined surface and fiducial based registration method to register the preoperative 3D CT data to the intraoperative surface of larynx. To accurately model the exposed surface area, a structured light based stereo vision technique is used for the surface reconstruction. We combined the gray code pattern and multi-line shifting to generate the intraoperative surface of the larynx. To register the point clouds from the intraoperative stage to the preoperative 3D CT data, a shape priori based ICP method is proposed to quickly register the two surfaces. The proposed approach is capable of tracking the fiducial markers and reconstructing the surface of larynx with no damage to the anatomical structure. We used off-the-shelf digital cameras, LCD projector and rapid 3D prototyper to develop our experimental system. The final RMS error in the registration is less than 1mm.

Paper Details

Date Published: 21 March 2007
PDF: 12 pages
Proc. SPIE 6509, Medical Imaging 2007: Visualization and Image-Guided Procedures, 650908 (21 March 2007); doi: 10.1117/12.709612
Show Author Affiliations
Ge Jin, The George Washington Univ. (United States)
Sang-Joon Lee, The George Washington Univ. (United States)
James K. Hahn, The George Washington Univ. (United States)
Steven Bielamowicz, The George Washington Univ. (United States)
Rajat Mittal, The George Washington Univ. (United States)
Raymond Walsh, The George Washington Univ. (United States)

Published in SPIE Proceedings Vol. 6509:
Medical Imaging 2007: Visualization and Image-Guided Procedures
Kevin R. Cleary; Michael I. Miga, Editor(s)

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