Key result
PureCalcium virtual non-contrast CCTA estimates EAT volume within ~3% of true non-contrast scans.
Why the study?
To assess epicardial adipose tissue volume and attenuation using virtual non-contrast reconstructions from photon-counting detector coronary CTA datasets to potentially replace true non-contrast series.
Can virtual non-contrast reconstructions derived from photon-counting detector coronary CTA datasets reliably assess epicardial adipose tissue volume and attenuation compared to true non-contrast series?
Observational (n=42)
No
Can virtual non-contrast reconstructions derived from photon-counting detector coronary CTA datasets reliably assess epicardial adipose tissue volume and attenuation compared to true non-contrast series?
A novel calcium-preserving virtual non-contrast algorithm derived from photon-counting detector coronary CTA datasets enables highly accurate assessment of epicardial adipose tissue volume and attenuation, potentially obviating the need for true non-contrast scans and reducing radiation dose.
Answers are grounded in this paper and cite their sources.
May enable EAT assessment from photon-counting CCTA without dedicated non-contrast scans; extends validation of virtual reconstructions but remains hypothesis-generating.
OBJECTIVES: To assess epicardial adipose tissue (EAT) volume and attenuation of different virtual non-contrast (VNC) reconstructions derived from coronary CTA (CCTA) datasets of a photon-counting detector (PCD) CT-system to replace true non-contrast (TNC) series. METHODS: ). EAT volumes and their histograms were assessed for each series. Linear regression was used to correlate EAT volumes and the Euclidian distance for histograms. The paired t-test and the Wilcoxon signed-rank test were used to assess differences for parametric and non-parametric data. RESULTS: (mean attenuation difference +7% vs. +2%; Euclidean distance of histograms 0.029 vs. 0.016). Substitution of TNC would significantly decrease patient's radiation dose. KEY POINTS: ) enables reliable assessment of EAT volume and attenuation with superior accuracy compared to measurements on conventional VNC- and CCTA-series.
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Risch et al. (2022) conducted an observational in Clinically indicated coronary CTA (n=42). PureCalcium virtual non-contrast (VNCPC) reconstruction vs. True non-contrast (TNC) series was evaluated on Epicardial adipose tissue (EAT) volume (mL) (-5.7 mL difference, p=0.001). PureCalcium virtual non-contrast reconstructions from photon-counting CCTA datasets assessed epicardial adipose tissue volume with only a 3% mean difference compared to true non-contrast series.
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