“…For T1 mapping, prior COVID-19 studies have used an array of pulse sequences that vary with respect to saturation/inversion pulse design, sampling interval, and fitting algorithm. 48-50,5-80,51,52,61,72,82-84,86,87 Similarly, among the T2 mapping studies reported, different pulse sequences, fitting algorithms, and signal equations have been used to estimate decay curves 48,49,51,52,61,72,76-80,82-87 —each of which is capable of impacting the derived T2. Additionally, as is the case for LGE, variable spatial resolution provides a potential source of data heterogeneity of particular importance to the post-COVID athlete, given that endurance and strength-trained athletes can manifest differential LV remodeling 90,91 and that some studies have reported athletes to manifest increased LV trabeculations 92 (providing a source of partial voxel admixture of LV blood pool and myocardium).…”