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Proceedings Paper

Augmented reality system for CT-guided interventions: system description and initial phantom trials
Author(s): Frank Sauer; Uwe Joseph Schoepf; Ali Khamene; Sebastian Vogt; Marco Das; Stuart G. Silverman
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Paper Abstract

We are developing an augmented reality (AR) image guidance system, in which information derived from medical images is overlaid onto a video view of the patient. The interventionalist wears a head-mounted display (HMD) that presents him with the augmented stereo view. The HMD is custom fitted with two miniature color video cameras that capture the stereo view of the scene. A third video camera, operating in the near IR, is also attached to the HMD and is used for head tracking. The system achieves real-time performance of 30 frames per second. The graphics appears firmly anchored in the scne, without any noticeable swimming or jitter or time lag. For the application of CT-guided interventions, we extended our original prototype system to include tracking of a biopsy needle to which we attached a set of optical markers. The AR visualization provides very intuitive guidance for planning and placement of the needle and reduces radiation to patient and radiologist. We used an interventional abdominal phantom with simulated liver lesions to perform an inital set of experiments. The users were consistently able to locate the target lesion with the first needle pass. These results provide encouragement to move the system towards clinical trials.

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: 10.1117/12.480383
Show Author Affiliations
Frank Sauer, Siemens Corporate Research, Inc. (United States)
Uwe Joseph Schoepf, Brigham and Women's Hospital (United States)
Ali Khamene, Siemens Corporate Research, Inc. (United States)
Sebastian Vogt, Siemens Corporate Research, Inc. (United States)
Marco Das, Brigham and Women's Hospital (United States)
Stuart G. Silverman, Brigham and Women's Hospital (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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