Fig. 1: Illustration of the long axis cines across the mitral annulus and exemplary tracking features to reconstruct normal human mitral annulus geometry.

a Ten long axis cines centered at the mitral valve were acquired to include the commissures, trigones, and anterior and posterior midpoints with 5 additional long axis cines equally spaced in between. b Selected long axis slices to demonstrate the 3D reconstructed view. c–e Demonstration of the two mitral annulus points chosen at end systole for each long axis cine. f An exemplary result of the mitral annulus model at end systole reconstructed from the tracking points using the long axis cines. g Intersecting of the mitral annulus model with a long axis cine across the anteroposterior midpoints of the mitral annulus. h intersecting of the mitral annulus model with a short axis cine closest to the mitral annulus. The colored arrows note the following landmarks: white—posteromedial commissure; yellow—left trigone; orange—anterior midpoint; pink—right trigone; green—anterolateral commissure; blue—posterior midpoint.