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Proceedings Paper

Endoscopic laser range scanner for minimally invasive, image guided kidney surgery
Author(s): Eric Friets; Jerry Bieszczad; David Kynor; James Norris; Brynmor Davis; Lindsay Allen; Robert Chambers; Jacob Wolf; Courtenay Glisson; S. Duke Herrell; Robert L. Galloway
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Paper Abstract

Image guided surgery (IGS) has led to significant advances in surgical procedures and outcomes. Endoscopic IGS is hindered, however, by the lack of suitable intraoperative scanning technology for registration with preoperative tomographic image data. This paper describes implementation of an endoscopic laser range scanner (eLRS) system for accurate, intraoperative mapping of the kidney surface, registration of the measured kidney surface with preoperative tomographic images, and interactive image-based surgical guidance for subsurface lesion targeting. The eLRS comprises a standard stereo endoscope coupled to a steerable laser, which scans a laser fan beam across the kidney surface, and a high-speed color camera, which records the laser-illuminated pixel locations on the kidney. Through calibrated triangulation, a dense set of 3-D surface coordinates are determined. At maximum resolution, the eLRS acquires over 300,000 surface points in less than 15 seconds. Lower resolution scans of 27,500 points are acquired in one second. Measurement accuracy of the eLRS, determined through scanning of reference planar and spherical phantoms, is estimated to be 0.38 ± 0.27 mm at a range of 2 to 6 cm. Registration of the scanned kidney surface with preoperative image data is achieved using a modified iterative closest point algorithm. Surgical guidance is provided through graphical overlay of the boundaries of subsurface lesions, vasculature, ducts, and other renal structures labeled in the CT or MR images, onto the eLRS camera image. Depth to these subsurface targets is also displayed. Proof of clinical feasibility has been established in an explanted perfused porcine kidney experiment.

Paper Details

Date Published: 8 March 2013
PDF: 8 pages
Proc. SPIE 8671, Medical Imaging 2013: Image-Guided Procedures, Robotic Interventions, and Modeling, 867105 (8 March 2013); doi: 10.1117/12.2007608
Show Author Affiliations
Eric Friets, Creare Inc. (United States)
Jerry Bieszczad, Creare Inc. (United States)
David Kynor, Creare Inc. (United States)
James Norris, Creare Inc. (United States)
Brynmor Davis, Creare Inc. (United States)
Lindsay Allen, Creare Inc. (United States)
Robert Chambers, Creare Inc. (United States)
Jacob Wolf, Creare Inc. (United States)
Courtenay Glisson, Vanderbilt Univ. (United States)
S. Duke Herrell, Vanderbilt Univ. (United States)
Robert L. Galloway, Vanderbilt Univ. (United States)

Published in SPIE Proceedings Vol. 8671:
Medical Imaging 2013: Image-Guided Procedures, Robotic Interventions, and Modeling
David R. Holmes III; Ziv R. Yaniv, Editor(s)

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