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Transforming a tetrahedral mesh into a hexahedral one. On the left, the division of a single tetrahedron into four hexahedra (A) and three successive iterations (B–D) of the Refine‐By‐Splitting (RBS) procedure. On the right, the internal view of a left‐ventricle hexahedral mesh generated from a finer tetrahedral mesh with zero RBS (E) and from a coarser tetrahedral mesh with two RBS (F), respectively
