Axial Multiplanar Reconstruction Contrast-Enhanced Magnetic Resonance Angiography of Supra-aortic Vessels in Predicting Degree of Stenosis: Comparison with Digital Subtraction Angiography
Journal Title: International Journal of Medical Science and Innovative Research (IJMSIR) - Year 2018, Vol 3, Issue 10
Abstract
Purpose: Contrast-enhanced MR angiography (CE MRA) is a noninvasive, screening and preoperative imaging method used for the evaluation of supraaortic vessels. There might be difficulty during the evaluation of CE MRA from MIP or coronal source images if there is jugular vein enhancement or marked tortuosity of the supraaortic vessels. In this study we evaluated the specificity, sensitivity, and accuracy of axial multiplanar reconstruction (MPR) images of CE MRA and compared the results with digital subtraction angiography (DSA). Materials And Methods: Two radiologists evaluated supraaortic vessels in a consensual manner blinded to clinical symptoms and DSA results on axial MPR CE MRA images in 168 vessels of 21 symptomatic patients. The severity of stenosis was defined as normal (0%), mild stenosis (1-29%), moderate stenosis (30-69%), severe stenosis (70-99%), and occluded (100%). Axial MPR CE MRA results and corresponding DSA results were compared. Results: In the detection of stenosis, axial MPR CE MRA sensitivities were 78%, 75%, 62%, and 50% for common carotid artery (CCA), subclavian artery (SA), internal carotid artery (ICA), and vertebral artery (VA), respectively. Axial MPR CE MRA had specificity of 70%, 100%, 50%, and 60% for CCA, SA, ICA and VA, respectively. Conclusion: Although axial MPR CE MRA imaging provides relatively high sensitivity and specificity for the detection of especially CCA and SA stenoses, axial MPR images alone may not be sufficient. Furthermore, if jugular vein enhancement occurs or marked tortuosity of the arteries is present, evaluation of CE MRA may be difficult. In such a situation, axial MPR images may be used as an adjunctive to MIP and coronal source images.
Authors and Affiliations
Hale AYDIN
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