Skip to main content
. Author manuscript; available in PMC: 2015 Jul 30.
Published in final edited form as: Ann Thorac Surg. 2011 Jul 30;92(3):797–803. doi: 10.1016/j.athoracsur.2011.04.047

Figure 2. Leaflet Segmentation Technique.

Figure 2

Panel A demonstrates leaflet segmentation using transverse cross-sections every 1 mm along intercommissural axis (anterior commissure – AC, posterior commissure – PC). Panel B demonstrates one of the 2D cross-sections represented by the white dashed line in panel A. In each of these septolateral measurement planes, between 5 and 40 individual points (depending on the septolateral diameter of the MV at the position of a given measurement plane) on the atrial surface of the MV are manually marked (green curves). The position of each point is recorded as anterior mitral leaflet (AML), coaptation leaflet (coapt) or posterior mitral leaflet (PML). The most atrial coaptation point is marked with an O while the most ventricular coaptation point is marked with an X. Panel C is a schematic which demonstrates how the atrial and ventricular coaptation points are then projected onto a viewing plane orthogonal to the least squares annular plane passing through the commissures to construct a 2D representation the atrial (O’s) and ventricular (X’s) coaptation edges. The area bounded by these coaptation lines is defines the coaptation area in this projection. The white and red dashed lines are both within least squares annular plane in all three panels.