Constrained registration for motion compensation in atrial fibrillation ablation procedures
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United States of America Patent
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Mar 1, 2016
Grant Date -
Oct 25, 2012
app pub date -
Mar 2, 2012
filing date -
Apr 8, 2011
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Abstract
A method for model based motion tracking of a catheter during an ablation procedure includes receiving a training series of biplanar fluoroscopic images of a catheter acquired under conditions that will be present during an ablation procedure, segmenting and processing the series of biplanar images to produce a distance transform image for each biplanar image at each acquisition time, minimizing, for each pair of biplanar images at each acquisition time, a cost function of the distance transform image for each pair of biplanar images to yield a translation parameter that provides a best fit for a model of the catheter to each pair of biplanar images at each acquisition time, and calculating an updated catheter model for each acquisition time from said translation parameter.
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