Fig. 4.

Automatic segmentation of the mitral leaflets at diastole (top row) and systole (bottom row) for a given patient. First, a probabilistic segmentation is generated by multi-atlas label fusion (red = anterior leaflet, blue = posterior leaflet). Then the cm-rep template (translucent) is initialized to the multi-atlas segmentation and the template is deformed to obtain a medial model of the mitral leaflets. The medial template shown in Fig. 3 is used for model initialization at diastole, and the fitted diastolic model is used to initialize model fitting of the same subject's valve at systole. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)