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Proceedings Paper

A 3D optical flow technique based on mass conservation for deformable motion estimation from 4-D CT images of the lung
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Paper Abstract

The accuracy of optical flow estimation algorithms has been improving steadily by refining the objective function which should be optimized. A novel energy function for computing optical flow from volumetric X-ray CT images is presented. One advantage of the optical flow framework is the possibility to enforce physical constraints on the numerical solutions. The physical constraints which have been included here are: brightness constancy, gradient constancy, continuity equation based on mass conservation, and discontinuity-preserving spatio-temporal smoothness. The method has been evaluated on POPI-model and the evaluation demonstrates that the method results in significantly better accuracy than previous optical flow techniques for estimation of deformable lung motion.

Paper Details

Date Published: 16 April 2012
PDF: 6 pages
Proc. SPIE 8317, Medical Imaging 2012: Biomedical Applications in Molecular, Structural, and Functional Imaging, 83171F (16 April 2012); doi: 10.1117/12.912628
Show Author Affiliations
Mohammadreza Negahdar, Medical Imaging Lab., Univ. of Louisville (United States)
Amir A. Amini, Medical Imaging Lab., Univ. of Louisville (United States)


Published in SPIE Proceedings Vol. 8317:
Medical Imaging 2012: Biomedical Applications in Molecular, Structural, and Functional Imaging
Robert C. Molthen; John B. Weaver, Editor(s)

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