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Proceedings Paper

Switched pattern laser projection for real-time depth extraction and visualization through endoscopes
Author(s): Kurtis Keller; Jeremy D. Ackerman; Henry Fuchs
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Paper Abstract

Gathering depth information through an endoscope or laparoscope during surgical or other procedures is quite difficult. There are stereo laparoscopes but generating three-dimensional models with them is very difficult. Accurate real-time generation of three-dimensional models through a laparoscope is a needed technology to enable a wide range of surgical applications. We have designed a miniature laparoscopic optical system consisting of a single laser whose pattern is modulated and uses the laparoscope as the optical display path into the body. Two cameras, one sensitive to the laser light and the other for full color imaging share this same tube as the laser projector but use the light from the opposite direction. The images gathered by the laser sensitive camera are used to generate a three dimensional map, and the color image is used to acquire the corresponding texture map. High-speed image processing hardware is used to generate 3D information using a structured light technique. The user can then re-render the acquired scene in 3D. The optical system is divided into a removable upper half consisting of the cameras, laser, digital light switches and combining optics. The lower half is the laparoscope or endocope that can be sterilized. There can be several variations in the configuration of the laparoscope optical half that tailor to different procedures.

Paper Details

Date Published: 4 September 2002
PDF: 8 pages
Proc. SPIE 4768, Novel Optical Systems Design and Optimization V, (4 September 2002); doi: 10.1117/12.482182
Show Author Affiliations
Kurtis Keller, Univ. of North Carolina/Chapel Hill (United States)
Jeremy D. Ackerman, Univ. of North Carolina/Chapel Hill (United States)
Henry Fuchs, Univ. of North Carolina/Chapel Hill (United States)

Published in SPIE Proceedings Vol. 4768:
Novel Optical Systems Design and Optimization V
Jose M. Sasian; R. John Koshel, Editor(s)

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