When performing equilibrium-gated blood pool imaging, temporal smoothing should be used only when

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Temporal smoothing should be used only when the heart rate is regular.If the R-R interval has significant variation, temporal smoothing causes errors.The latter frames of the acquisition, which contain fewer counts, are averaged with the initial frames.If these data are used to calculate the ejection fraction, the end-diastolic counts in the left ventricle are lower than they should be, resulting in a calculated ejection fraction that is too low.

When Performing Equilibrium-Gated Blood Pool Imaging, Temporal Smoothing Should Be