Evaluation of aortic aneurysms and dissection by magnetic resonance imaging and computed tomography

ABSTRACT

The proper management of aneurysms of the aorta and of aortic dissection requires the precise evaluation of the target vessel. It is important to have a correct definition of the artery diameter and the full extent of the diseased segment. Besides it is also mandatory to have an exact appreciation of the morphology of the vessel and the relation of the affected segments and the branches of the aorta. In case of dissection it is also important to have information on the left ventricular function, the aortic valve function and the presence of pericardial or pleural effusion. Computed tomography and magnetic resonance imaging are non-invasive imaging modalities that may be used to evaluate the aorta and define the diagnosis. Recent technological developments made the results of both methods similar in many instances, making the selection between them confusing. The goal of this paper is to review the relative contribution of each of these powerful techniques, trying to help the physician in selecting the most adequate test for each particular patient.