Magnetic resonance (MR) is well suited to imaging the pericardium. High res
olution images synchronized with the cardiac cycle can be obtained in any p
lane. The wide field of view allows additional anatomical and functional in
formation to be obtained from adjacent structures such as the aorta, pleura
, lungs and mediastinum. MR is particularly useful in cases of pericardial
constriction without an associated effusion, in patients with complex or lo
culated pericardial effusions and in pericardial tumours. In this article w
e illustrate the characteristic MR features of a variety of pericardial pat
hologies.