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Updated: July 8th, 2008 05:26 PM CDT

3D Rotational X-ray Navigation System Useful in Functional Endoscopic Sinus Surgery

Biotech Week
via NewsEdge Corporation

2006 MAR 8 - ( -- A novel navigation system provides valuable information during functional endoscopic sinus surgery.

"Recently, 3-dimensional (3D) rotational X-ray imaging has been combined with navigation technology, enabling direct 3D navigation for minimally invasive image guided interventions," scientists in the Netherlands explained.

In a study conducted by E.B. van de Kraats and coauthors at the University of Utrecht Medical Center, "phantom experiments" were "used to determine the accuracy of such a navigation set-up for a mobile C-arm with propeller motion."

"After calibration of the C-arm system, the accuracy is evaluated by pinpointing divots on a special-purpose phantom with known geometry," the investigators said. "This evaluation is performed both with and without C-arm motion in between calibration and registration for navigation."

"The variation caused by each of the individual transformations in the calibration and registration process is also studied," according to the report. "The feasibility of direct navigation on 3D rotational X-ray images for functional endoscopic sinus surgery has been evaluated in a cadaver navigation experiment."

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