ArticleLa Radiologia medica2026
Improving aortic calcium assessment in contrast-enhanced CT: exploring Hounsfield Unit thresholds for cardiovascular scoring.
Article in La Radiologia medica, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
purposeCardiovascular disease is the leading global cause of death, and vascular calcification is a key marker of atherosclerotic burden. This study aimed to determine optimal Hounsfield Unit (HU) thresholds for quantifying aortic calcification on contrast-enhanced CT. MATERIAL AND
methodsThis retrospective single-center study included 1125 patients (344 women, 781 men) who underwent triphasic CT angiography. Fixed (100-900 HU) and dynamic thresholds were applied to arterial and venous phases and compared with non-contrast Agatston scores. Correlation, linear regression and Bland-Altman analyses were used to assess agreement and predictive performance.
resultsIn the venous phase, the 300 HU threshold demonstrated the strongest correlation with the Agatston score (thoracic aorta Spearman's rank correlation coefficient ρ = 0.93; abdominal aorta: ρ = 0.92; all p < 0.001) and the highest predictive accuracy (R
conclusionA fixed threshold of 300 HU in the venous phase may represent a pragmatic surrogate marker for estimating aortic calcification on contrast-enhanced CT when non-contrast imaging is unavailable.
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