title: Magnetic resonance imaging of the superior pericardial recesses.
abstract: The potential of magnetic resonance imaging (MRI) of the superior pericardial space was evaluated in a retrospective review of MR images of 46 subjects. The superior pericardial space and its two recesses had low signal intensity. The preaortic recess was demonstrated on 82% of nongated transverse scans. The retroaortic recess was demonstrated on 67% of nongated transverse scans. Generally, both recesses were shown with an even higher frequency on ECG-gated and ECG-permutation-gated scans. Knowledge of the location and typical appearance of these pericardial recesses should preclude mistaking them on MRI for a vascular structure, aortic dissection, or an atherosclerotic plaque or mural thrombus within the ascending aorta.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D004562:Electrocardiography; D006801:Humans; D007223:Infant; D009682:Magnetic Resonance Spectroscopy; D008875:Middle Aged; D010496:Pericardium / Q000033:anatomy & histology*; D012189:Retrospective Studies