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Probabilistic Interpolation of Uncertain Local Activation Times

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FHTW01 - Uncertainty quantification for cardiac models

Local Activation Time (LAT) measurements on the left atrium are subject to uncertainty due to electrogram analysis and the assignment of measurements to an anatomical mesh. Interpolation of LAT measurements to provide LAT maps also introduces prediction uncertainty. Using Gaussian Markov Random Fields, it is possible to perform probabilistic interpolation of uncertain LAT measurements directly on the left atrium. This produces a probabilistic LAT map which can be viewed as a mean and standard deviation of LAT at every mesh location.

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