Evolution of pulmonary perfusion defects demonstrated with contrast-enhanced dynamic MR perfusion imaging

Pulmonary perfusion defects can be demonstrated; with contrast-enhanced dyn amic MR perfusion imaging. We present the case of a patient with a pulmonar y artery sarcoma who presented with a post-operative pulmonary embolus and was followed in the post-operative period with dynamic contrast-enhanced MR perfusion imaging. This technique allows rapid imaging of the first passag e of contrast material through the lung after bolus injection in a pe:perip heral vein. To our knowledge, this case report is the first to describe the use of this MR technique in showing the evolution of peripheral pulmonary per;fusion defects associated with pulmonary emboli.