Fig. 4From: The effect of high count rates on cardiac perfusion quantification in a simultaneous PET-MR system using a cardiac perfusion phantomTop—Net trues and prompt rates from each injected activity experiment performed with the cardiac perfusion phantom. Of note is that above a net trues rate of approximately 2.6 × 106 (corresponding to A INJ = 398 MBq), the trues rate at peak input function actually begins to decrease due to the decrease in live-time fractionBack to article page