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Fig. 5 | EJNMMI Physics

Fig. 5

From: Innovative procedure for measuring left ventricular ejection fraction from 18F-FDG first-pass ultra-sensitive digital PET/CT images: evaluation with an anthropomorphic heart phantom

Fig. 5

Left ventricle A volumes and B ejection fractions of the heart-phantom pair. These values were measured by MRI, SPECT, planar scintigraphy, native 3D PET/CT, and “pseudo-planar” PET/CT projections on the cardiac small axis and horizontal long axis. LVEF, left ventricular ejection fraction. The prefixes “a” and “m” signify automated and manual calculations, respectively. Left ventricle end-diastole and end-systole volumes are not shown in A for planar scintigraphy or the “pseudo-planar” PET/CT projections because these modalities do not provide information about left ventricle volumes. The automated left ventricle volumes and LVEF values shown for SPECT and native PET were calculated by using the surface-based QBS method. 1“Full automated” computations represent analysis with no human intervention, so no variability expected nor observed. 2“Semi-automated” processes stand for automated computation of LVEF after a manual placement of anatomical landmarks (valves and septum). For semi-automated and manual processes, the value corresponds to the average of 4 repetitions of the image treatment with 4 different operators, and the error bar represents the standard deviation (inter-operator variability)

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