High-pitch Low-dose Chest Computed Tomography With Calcium-aware Reconstruction for Coronary Artery Calcium Scoring
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Overview
Randomized trial evaluates accuracy and radiation dose of high-pitch CT in coronary artery calcium scoring, suggesting clinical feasibility.
Key Points
This study aims to assess the accuracy, radiation dose, and feasibility of a high-pitch low-dose CT scanning protocol for coronary artery calcium scoring.
Prospective study involving 90 patients undergoing standard and high-pitch low-dose chest CT protocols.
CAC scoring evaluated using Agatston score and other metrics.
Comparison of protocols involved intraclass correlation, Bland-Altman analysis, and weighted kappa.
CAC metrics showed excellent agreement (ICC = 0.983 to 0.996) between protocols.
Sa36LDCT significantly reduced effective radiation dose by 62% (0.74 vs. 0.28 mSv, P < 0.001) without compromising image quality.
Risk stratification based on Agatston categories demonstrated near-perfect consistency (weighted k = 0.957) across heart rate subgroups.