Segmentation process of a healthy volunteer. (1) Original 3D LGE-CMR image. (2) Manually drawn epicardial and endocardial contours. (3) Deformation of 50% layer. (4) Pulmonary veins and mitral withdrawal. (5) Three-dimensional colour-coded LGE-CMR shell. (5a) Posterior view. (5b) Anterior view.