Coronary CT angiography (CCTA) has been recognized as the first-line diagnostic test for most patients with suspected coronary syndrome, often acting as a gatekeeper for invasive coronary angiography. It is therefore pivotal to understand instances of discrepancies that are encountered in clinical practice. Moreover, most of the literature on this topic relies on obsolete machines or definitions of coronary artery stenosis that cannot be defined as severe. The investigators aim 1) to report the real word data on the performance of last-generation CCTA in identifying obstructive coronary artery disease (also considering different thresholds of stenosis, i.e., moderate or severe) and 2) to identify predictors of discrepancies.