1. A fully automated method for leaflet and/or annulus segmentation in 3D echocardiographic ultrasound images using a set of expert-labeled 3D echocardiographic image atlases of leaflets and/or a deformable medial model template of a valve, comprising: acquiring a 3D target image to segment; registering the image atlases to the target image and propagating atlas labels to the target image to obtain a set of candidate segmentations; generating a probabilistic consensus segmentation using joint label fusion; and applying 3D deformable modeling to the probabilistic consensus segmentation to generate a 3D geometric model of the leaflets and/or annulus in the target image.