Figure 13. The “Flexy’slice” tool of the 3D software of the GE Vivid9 machine is used to obtain the best anatomical short-axis cut of the stenotic valve orifice, by shifting the transverse (yellow panel) and longitudinal (white panel) 3D cuts (panes). The result is the short axis “en face” view of the green panel, where the planimetry of the aortic valve is performed (1.9 cm²). In this case, the are obtained is identical to that calculated with the Doppler continuity equation (1,8 cm²), whereas the 2D planimetry appears to overestimated the stenotic area (2.3 cm²) (see above)