Key result
The mean CT attenuation of aortic blood (46 HU) was significantly higher than that of the myocardium (39 HU, p<0.01), with large variations suggesting an adaptive threshold may improve coronary calcification detection.
Cross-Sectional (n=54)
No
Absolute Event Rate: 46% vs 39%
p-value: p=<0.01
While historical thresholds of 90 and 130 HU offer high confidence for excluding blood and myocardium in calcium scoring, large variations suggest an adaptive threshold may be more accurate.
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Large attenuation variations in calcium scoring CT warrant caution with fixed thresholds; leaves open whether adaptive models improve detection accuracy.
Qanadli et al. (2015) conducted a cross-sectional in Healthy volunteers (n=54). Non-enhanced multi-detector CT was evaluated on Mean attenuation of aortic blood compared to left ventricular myocardium (p=<0.01). The mean CT attenuation of aortic blood (46 HU) was significantly higher than that of the myocardium (39 HU, p<0.01), with large variations suggesting an adaptive threshold may improve coronary calcification detection.
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