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Proceedings Paper

Intraoperative augmented reality for minimally invasive liver interventions
Author(s): Michael Scheuering; Andrea Schenk; Armin Schneider; Bernhard Preim; Guenther Greiner
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Paper Abstract

Minimally invasive liver interventions demand a lot of experience due to the limited access to the field of operation. In particular, the correct placement of the trocar and the navigation within the patient's body are hampered. In this work, we present an intraoperative augmented reality system (IARS) that directly projects preoperatively planned information and structures extracted from CT data, onto the real laparoscopic video images. Our system consists of a preoperative planning tool for liver surgery and an intraoperative real time visualization component. The planning software takes into account the individual anatomy of the intrahepatic vessels and determines the vascular territories. Methods for fast segmentation of the liver parenchyma, of the intrahepatic vessels and of liver lesions are provided. In addition, very efficient algorithms for skeletonization and vascular analysis allowing the approximation of patient-individual liver vascular territories are included. The intraoperative visualization is based on a standard graphics adapter for hardware accelerated high performance direct volume rendering. The preoperative CT data is rigidly registered to the patient position by the use of fiducials that are attached to the patient's body, and anatomical landmarks in combination with an electro-magnetic navigation system. Our system was evaluated in vivo during a minimally invasive intervention simulation in a swine under anesthesia.

Paper Details

Date Published: 30 May 2003
PDF: 11 pages
Proc. SPIE 5029, Medical Imaging 2003: Visualization, Image-Guided Procedures, and Display, (30 May 2003); doi: 10.1117/12.480212
Show Author Affiliations
Michael Scheuering, Frederich-Alexander Univ. Erlangen-Nurnberg (Germany)
Andrea Schenk, MeVis Bremen (Germany)
Armin Schneider, Technische Univ. Munchen (Germany)
Bernhard Preim, MeVis Bremen (Germany)
Guenther Greiner, Frederich-Alexander Univ. Erlangen-Nurnberg (Germany)

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

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