Contrast agent-intravenous, CT-Quantitative, Cardiac, Ischaemia / Infarction
T. Rienmüller1, C. Baumgartner1, V. Makarenko2, L. Bockeria2, P. Ourednicek3, R. Rienmüller4; 1Hall in Tirol/AT, 2Moscow/RU, 3Brno/CZ, 4Graz/AT
In this study,
we quantitatively evaluated differences in absolute CT numbers resulting from various image reconstruction methods in simulated MBF measurements using a phantom body and MBF measurements of one patient.
The mean values of large ROIs and smaller ROIs in the images remain almost unchanged with different levels of iterative reconstruction.
The range of HU-values (MIN -- MAX) dicreases as well as the standard deviation.
Myocardial blood flow parameters also remained almost unchanged for all different reconstruction methods.
we can confirm that IR preserves stable mean values with lower variance compared to FBP allowing for a better quantitative estimation of global and regional MBF,
especially when selecting small ROIs.