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A Smooth and Stable Fly-Through Scheme for Virtual Navigation of 3D CT Colonography

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2 Author(s)
Dehmeshki, J. ; Kingston Univ., Kingston upon Thames ; Amin, D.

This paper presents an efficient algorithm for virtual fly-through of CT-colonography. The algorithm first segments colon using a fuzzy based region growing technique. Then, a skeletonization method based on a voxel coding scheme to define an optimum path for virtual camera is applied on segmented colon. The optimum path is a connected and one-voxel-thin centerline of a 3D object, which provides the location of a virtual camera for the fly-through. Finally, a smooth and stable virtual camera view direction on the optimum path is recursively calculated based on updating the view direction of the current site by adding a deviation vector that is determined by the weighted average of the deviation vector of the next n voxels with respect to the current location. The proposed system was applied on several CT colonography data. The experimental result was visually inspected by a qualified radiologist and it demonstrates the efficiency of the algorithm.

Published in:

3DTV Conference, 2007

Date of Conference:

7-9 May 2007