Highly accurate coronary angiography with submillimetre, 16 slice computed tomography

Area of Science:

• Cardiovascular imaging
• Radiology
• Medical diagnostics

Background:

• Coronary artery disease diagnosis relies on invasive angiography.
• Non-invasive imaging modalities are sought to improve patient outcomes and reduce risks.
• Submillimetre coronary computed tomographic angiography (CTA) offers potential for accurate lumen visualization.

Purpose of the Study:

• To evaluate the accuracy of submillimetre coronary CTA against invasive coronary angiography.
• To determine the impact of significant coronary artery calcification (CAC) on coronary CTA accuracy.

Main Methods:

• 58 patients underwent invasive coronary angiography followed by submillimetre coronary CTA.
• Coronary CTA utilized a GE Lightspeed 16 CT system with retrospective ECG gating.
• Coronary artery segments were assessed for >= 50% stenosis and compared to the gold standard.

Main Results:

• Overall accuracy for detecting >= 50% stenosis: sensitivity 83%, specificity 97%.
• In patients with significant CAC (score >= 400), accuracy improved when excluding them: sensitivity 89%, specificity 98%.
• Correct diagnosis of diseased coronary arteries in 89% of patients.

Conclusions:

• Submillimetre coronary CTA is a reliable and accurate non-invasive diagnostic tool.
• Patient selection based on CAC score can further enhance coronary CTA accuracy.
• Coronary CTA is nearing clinical readiness, warranting further research into its specific applications.