Figure 3. (A) T1 without fs and (B) T1 with fs weight images also demonstrate high signal intensity without fat suppression. (C) Ten-minute delayed MR images with phase-sensitive inversion recovery technique after administration of gadopentetate dimeglumine demonstrated the infiltrative mass (arrows) clearly with heterogeneous enhancement. (D, E). 4-chamber and RV in and out views in SSFP sequence, there is a large intrapericardial mass (arrow) that invades into the right atrium and inter-atrial septum with intra-cavitary portion of the mass in the right atrium, no invasion of the Coronary Sinus and RCA. There is an associated small pericardial effusion