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Vessel-based comparison between 3D QCA and IVUS/OCT. Correlations between 3D QCA and IVUS for short diameter (a) and long diameter (b). There is an increasing bias towards larger discrepancy in long diameter at higher vessel curvature. Correlations between 3D QCA and OCT for short diameter (c) and long diameter (d). There is also an increasing bias towards larger discrepancy in long diameter at higher vessel curvature. n = 40 vessels in 37 patients
