|ECR 2013 / C-0789|
|Measuring thoracic aortic diameter with different MR techniques: concordance of 3D CE-MRA (contrast-enhanced magnetic resonance angiography), 4D-trMRA (time-resolved contrast-enhanced magnetic resonance angiography) and 2D SSPP (steady-state free-precession) in evaluation of thoracic aortic diameter|
MR angiography (MRA) has become an established technique for the evaluation of a variety of aortic diseases, particularly suited for evaluating the thoracic aorta. Over the past several years, contrast-enhanced MR angiography (CE-MRA) techniques have largely replaced unenhanced MRA techniques for the evaluation of the thoracic aorta because of their high spatial resolution and reliability. However, gadolinium-containing contrast agents are contraindicated during pregnancy, because have been shown to be teratogenic in animal studies, and in patients with advanced renal failure, because of their association with nephrogenic systemic fibrosis (NSF). Also, CE-MRA is usually performed at injection rates of 2–3 mL/s, which requires a large IV catheter. Thus, in patients who are pregnant, who have extremely poor renal function or who have inadequate IV access, the use of gadolinium-based contrast material may be contraindicated or not feasible. In these patients would be desirable MRA techniques that do not require contrast material but are of equal quality and reliability as CE-MRA techniques.
Objective of our study is to evaluate the concordance of 3D CE-MRA, 4D trMRA and 2D-SSPP sequences in measurement of thoracic aortic diameters.
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