Figure 4.

Schematic illustration of the CMRI-based reconstruction algorithm. After the end-diastolic and end-systolic cardiac phases were identified, the epi- and endocardial layers were manually traced in cine short-axis images. Then, the endocardial contours of the right ventricle were exported to separate files as a series of 2D point coordinates. These files were supplied into a 3D mesh reconstruction pipeline that comprises four consecutive steps: (i) preprocessing contour data, (ii) creating 3D point clouds from contour data, (iii) reindexing the vertices in the 3D point clouds, and (iv) fitting closed surfaces to the 3D point clouds. See text for further details. CMR, cardiac magnetic resonance; RV, right ventricle.