Figure 19b. Organized pericardial hematoma in a 70-year-old woman with a history of coronary artery disease and angioplasty of the right coronary artery. (a) Axial ECG-gated T1-weighted SE image shows a mass (M) with heterogeneous signal intensity in the right atrioventricular groove. (b) Axial gadolinium-enhanced T1-weighted image shows no enhancement of the mass (M). (c, d) Magnitude (c) and phase velocity-encoded (d) cine images show no blood flow in the mass (M), a finding indicative of hematoma rather than pseudoaneurysm.