Artificial intelligence-powered automatic coronary computed tomography angiography plaque quantification: comparison against optical coherence tomography

Journal article

Aims: Coronary computed tomography angiography (CCTA) enables a non-invasive, comprehensive assessment of coronary artery disease, and artificial intelligence (AI) offers the potential to improve CCTA image interpretation. This study aimed to evaluate the performance of an AI-powered method for automatic plaque quantification from CCTA, with optical coherence tomography (OCT) as reference standard. Methods and results: Patients who underwent CCTA within 6 months prior to OCT were retrospectively enrolled. AI-assisted automatic plaque quantification was performed on CCTA with specific plaque composition classification based on adaptive Hounsfield unit thresholds. Qualitative high-risk plaque features were also assessed. Automated co-registration of CCTA and OCT was performed with the link of invasive coronary angiography. A total of 91 patients with 153 co-registered lesions were evaluated. The AI-assisted automatic CCTA analysis showed significant correlations with OCT for quantifying plaque volume/burden and different plaque compositions (all P values <0.001); of which, the correlation coefficient for plaque volume was 0.84. Vulnerable plaque, defined as lipid-to-cap ratio >0.33 on OCT, was identified in 39 (25.5%) lesions. CCTA-derived plaque volume >82.5 mm3 [odds ratio (OR), 9.39], maximal plaque burden >76.4% (OR, 3.70), lipidic tissue volume >16.3 mm³ (OR, 4.42), all P < 0.001, and high-risk plaque features ≥2 (OR, 2.70, P = 0.009) were independent predictors of OCT-derived vulnerable plaques. The average time for automatic CCTA plaque quantification was 1.8 min per patient. Conclusion: The novel AI-powered method facilitated fully automatic plaque quantification and correlated well with co-registered OCT.

Authors: Li, G; Yu, W; Wang, Z; Chen, Y; Chu, M

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: Oxford University Press
• Journal: European Heart Journal – Digital Health
• Volume: 7
• Issue: 3
• Pages: ztag024
• Article number: ztag024
• Publication date: 2026-02-09
• Acceptance date: 2026-01-05
• DOI: 10.1093/ehjdh/ztag024
• EISSN: 2634-3916
• ISSN: 2634-3916
• Language: English
• Keywords: Artificial intelligence; Optical coherence tomography; Coronary computed tomography angiography; Plaque vulnerability; Automatic co-registration; Plaque characterization