AI Calcium Scoring on Non-Gated Chest CT Shows High Agreement with ECG-Gated CTA, One Algorithm More Accurate

In 182 patients, AI calcium scoring on non-gated chest CT agreed well with manual ECG-gated CTA: ICC 0.90 (95% CI 0.871-0.926) and 0.96 (0.943-0.968), but correlation with stenosis severity was weak-to-moderate (r=0.151-0.560).

• Software B showed smaller bias (mean difference -80.35) and narrower limits of agreement (±292.99) than Software A (23.59 ±442.35).
• Correlation between calcium score and degree of coronary stenosis was weak-to-moderate (r=0.151–0.560, P<0.05), prompting authors to recommend combining scores with vascular remodeling assessment.

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