Fig. 2
Analysis of the self-gating signal. A Cardiac signal. B Calculation of variable thresholds using a moving maximum algorithm. C Calculation of trigger time stamps. The first value above the thresholds is defined as trigger point. D Calculation of relative heart cycle phases for each time stamp. Data points detected during respiration are assigned to a phase value Φh = − 1 (this algorithm was presented first by our group in [13])