CT Imaging Advances: Non-Invasive Detection of Coronary Artery Disease
Overview
Computed tomography (CT) has emerged as a highly accurate, non-invasive modality for early detection and quantification of coronary artery disease (CAD), outperforming invasive coronary angiography (ICA) in identifying non-obstructive CAD. Large multicentre trials demonstrate that CT-guided management improves patient outcomes, reduces procedural complications, and facilitates individualized treatment strategies.
Background
Coronary artery disease remains a leading cause of morbidity and mortality worldwide. Traditional diagnosis relies heavily on invasive coronary angiography, which carries procedural risks and may miss early atherosclerosis. Advances in multislice CT and cardiac-phase reconstruction have enabled reliable, quantitative, and non-invasive imaging of coronary atherosclerosis. Multidisciplinary research and large randomized controlled trials have established CT's diagnostic accuracy and clinical effectiveness in stable chest pain patients with intermediate CAD likelihood.
Data Highlights
Trial
Key Finding
Outcome
PROMISE
CT vs functional testing
Lower death or non-fatal MI rate with CT
SCOT-HEART
CT + standard care vs standard care
50% reduction in CAD mortality or non-fatal MI at 5 years; increased aspirin (52% vs 41%) and statin use (59% vs 50%)
DISCHARGE
CT vs ICA
Fewer major procedure-related complications; 25% reduction in revascularisation; increased additional functional testing
CAD-Man
CT vs ICA
Higher statin adherence (60% vs 39%) and greater cholesterol reduction at 3.3 years
Key Findings
CT detects non-obstructive CAD more accurately than ICA (36% vs 22%), enabling earlier preventive therapy.
CT-guided management increases use of aspirin and statins, correlating with reduced CAD mortality and myocardial infarction.
CT improves procedural planning for revascularisation, with imaging biomarkers guiding choice between percutaneous and surgical approaches.
Multidisciplinary collaboration has been essential in generating evidence and advancing CT integration into clinical pathways.
Limitations include less evidence in acute presentations and challenges in AI implementation for personalized therapy based on CT findings.
Clinical Implications
Incorporating CT into the diagnostic pathway for stable chest pain patients with intermediate CAD likelihood enables earlier detection and treatment of coronary atherosclerosis, improving long-term outcomes. CT also supports tailored therapeutic strategies and safer procedural planning, potentially reducing invasive procedures and complications. Clinicians should consider CT as a first-line imaging modality in appropriate patients to optimize preventive and interventional care.
Conclusion
CT imaging has transformed the non-invasive diagnosis and management of coronary artery disease, offering superior detection of early atherosclerosis and enabling personalized treatment strategies. Continued multidisciplinary research and clinical integration will further enhance patient outcomes and procedural safety.
References
PROMISE, SCOT-HEART, DISCHARGE Trials -- Large Multicentre Clinical Trials on CT in CAD
SCOT-HEART 5-Year Follow-Up -- Impact of CT on Mortality and MI
CAD-Man Trial -- Statin Adherence and Cholesterol Reduction with CT
DISCHARGE Trial -- CT vs ICA Procedural Outcomes
Technical Advances in Multislice CT and Cardiac-Phase Reconstruction
Multidisciplinary Collaboration in CT CAD Research
