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. 2022 Feb 18;17(15):1252–1259. doi: 10.4244/EIJ-D-21-00425

Figure 1. Simplified illustration of user-dependent steps in QFR computation.

Figure 1

The work flow includes: selection of two end-diastolic frames required for geometrical reconstruction (A); potential adjustment of the contour detection with correction points (B); selection of an automated (C1), normal segment-based (C2) or fixed proximal reference size (C3) function; performing corrected time-frame count analysis (D1-D3) for flow estimation; and final QFR (E).