|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|
Methods and Materials
From 2010 to 2011, 60 patients, with suspected or note aortic dilatation, underwent a MRI using a 1,5T MRI. Patients were divided in two groups: in 40 cases we use both3DCE-MRA and 2D-SSPP sequences while in the other 20 cases we use both 4DTRMRA and 2D-SSPP sequences.
Quantitative assessment of the image sets was performed by comparing the aortic lumen diameter. Indeed, all obtained images were evaluated by three independent radiologist, expert in the field, who measured aortic size at five specified locations (aortic bulb, sinotubular junction, middle of ascending aorta, aortic arch and middle of descending aorta). We use inter-operator concordance (interclass correlation, ICC), Pearson and t-test to evaluate the concordance of this sequences.
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