Fig. 4
Results of the in vivo measurements at high Trec variability. The recovery times recorded during the data acquisition are shown in A. The different colored curves show the individual Trec times for 10 repetitions of the T1ρ mapping sequence in animal I. In B the calculated relaxation time maps (short axis view, isotropic resolution 250 µm) for the monoexponential fit (left) and the corrected fit (right) are shown. 5 repetitions with different Trec times are exemplary shown. The mean T1 value 1391 ± 34 ms in myocardial tissue was obtained by an inversion recovery snapshot flash (IRSF) sequence and used to calculate the corrected maps. The maps show distinct artifact formation, which is primarily due to the unsteady breathing. The region-of-interest (ROI) based correlation analysis with Trec is shown in Fig. 6A