Fig. 3.
Example of multiple T2 maps acquired on the same subject using the T2P20TE sequence acquired under free breathing conditions with respiratory navigator gating. T2 maps were reconstructed with all T2prep echo times (20 TEs) or only a subset of the T2prep echo times (0 ms, 25 ms, 50 ms, ∞) (4 TEs). While the remaining in-plane motion generates artifacts on the directly reconstructed T2 maps (uncorrected), substantial improvement of T2 map quality was obtained using in-plane motion correction (motion corrected). As expected, the homogeneity of the T2 maps greatly improved when using all 20 T2prep echo times compared to only 4 T2prep echo times