Pericoronary adipose tissue CT attenuation and volume: Diagnostic performance for hemodynamically significant stenosis in patients with suspected coronary artery disease

•PCAT volume failed to identify ischemic stenosis (5.5 ± 3.7 cm3 vs. 5.0 ± 3.5 cm3, p = 0.511).•PCAT CT attenuation was correlated with ischemic stenosis (−75.3 ± 5.4 HU vs.-65.6 ± 5.9 HU; p = 0.000).•PCAT CT attenuation provided incremental diagnostic performance over CCTA (AUC: 0.869 vs. 0.598, p < 0.001).•PCAT volume failed to identify ischemic stenosis (5.5 ± 3.7 cm3 vs. 5.0 ± 3.5 cm3, p = 0.511).•PCAT CT attenuation was correlated with ischemic stenosis (−75.3 ± 5.4 HU vs.-65.6 ± 5.9 HU; p = 0.000).•PCAT CT attenuation provided incremental diagnostic performance over CCTA (AUC: 0.869 vs. 0.598, p < 0.001).