Whole Heart Anatomical Refinement from CCTA using Extrapolation and Parcellation

no code implementations • 18 Nov 2021 • Hao Xu, Steven A. Niederer, Steven E. Williams, David E. Newby, Michelle C. Williams, Alistair A. Young

In addition to the new labels, the median Dice scores were improved for all the initial 6 labels to be above 95% in the 10-label segmentation, e. g. from 91% to 97% for the left atrium body and from 92% to 96% for the right ventricle.

Anatomy Segmentation

Optimal Thinning of MCMC Output

3 code implementations • pproximateinference AABI Symposium 2021 • Marina Riabiz, Wilson Chen, Jon Cockayne, Pawel Swietach, Steven A. Niederer, Lester Mackey, Chris. J. Oates

The use of heuristics to assess the convergence and compress the output of Markov chain Monte Carlo can be sub-optimal in terms of the empirical approximations that are produced.

Gaussian Process Manifold Interpolation for Probabilistic Atrial Activation Maps and Uncertain Conduction Velocity

no code implementations • 22 Apr 2020 • Sam Coveney, Cesare Corrado, Caroline H Roney, Daniel O'Hare, Steven E Williams, Mark D O'Neill, Steven A. Niederer, Richard H Clayton, Jeremy E. Oakley, Richard D. Wilkinson

Here, we build upon a recent insight into reduced-rank Gaussian processes (GP) to perform probabilistic interpolation of uncertain LAT directly on human atrial manifolds.

Gaussian Processes