Fig. 9.

Analysing 3D + time (4D) cardiac images: First column shows corresponding 2D slices of a 4D MRI dataset at time points t = {0, 6, 12}. The second column, 3D shapes extracted at each of the time points. For five patients, we compute the nWESD shape dissimilarity score of the LV blood pool at each time point with respect to its shape at t = 0. The graph plots these scores. We note that the proposed shape distance is able to capture the dynamic process of the LV shape changes and furthermore, the symmetry between the two phases of an heart beat: diastole and systole.