Fig. 1

A representative case of CT-FFR and FAI assessment. (A) Three-dimensional color-coded mesh reveals hemodynamically significant lesions in the LAD, RCA, and PDA (CT-FFR = 0.62, CT-FFR ≤ 0.80 is considered positive). (B) Perivascular FAI phenotyping from CCTA in the proximal 0–40 mm of the LAD (FAI[LAD] = − 67 HU, FAI ≥ 70.1 is considered positive). CT-FFR, CT-derived fractional flow reserve; FAI, fat attenuation index; LAD, left anterior descending artery; RCA, right coronary artery; PDA, posterior descending artery; CCTA, coronary computed tomography angiography