Details

Autor(en) / Beteiligte

• Lucas, B. C.
• Otake, Y.
• Armand, M.
• Taylor, R. H.

Titel

An Active Contour Method for Bone Cement Reconstruction From C-Arm X-Ray Images

Ist Teil von

• IEEE transactions on medical imaging, 2012-04, Vol.31 (4), p.860-869

Ort / Verlag

United States: IEEE

Erscheinungsjahr

2012

Quelle

IEEE Electronic Library (IEL)

Beschreibungen/Notizen

• A novel algorithm is presented to segment and reconstruct injected bone cement from a sparse set of X-ray images acquired at arbitrary poses. The sparse X-ray multi-view active contour (SxMAC-pronounced "smack") can 1) reconstruct objects for which the background partially occludes the object in X-ray images, 2) use X-ray images acquired on a noncircular trajectory, and 3) incorporate prior computed tomography (CT) information. The algorithm's inputs are preprocessed X-ray images, their associated pose information, and prior CT, if available. The algorithm initiates automated reconstruction using visual hull computation from a sparse number of X-ray images. It then improves the accuracy of the reconstruction by optimizing a geodesic active contour. Experiments with mathematical phantoms demonstrate improvements over a conventional silhouette based approach, and a cadaver experiment demonstrates SxMAC's ability to reconstruct high contrast bone cement that has been injected into a femur and achieve sub-millimeter accuracy with four images.