Abstract
Peripheral arterial disease (PAD) is a common manifestation of systemic atherosclerosis. Although clinical history in conjunction with ankle–brachial index and evaluation of segmental pressures/waveforms is sufficient to diagnose PAD in a large percentage of patients, imaging is required for disease localization and treatment planning. Contrast-enhanced magnetic resonance angiography (CE-MRA) is a noninvasive, three-dimensional technique that has emerged as a front-line imaging approach for comprehensive evaluation of PAD. Technical advances such as parallel imaging and moving-table, time-resolved angiography and extended field-of-view approaches have greatly improved the accuracy of CE-MRA. In the clinical setting, CE-MRA can be extremely helpful in the initial diagnosis as well as subsequent management of patients with PAD. Continued hardware and software improvements will enable further refinements in imaging protocol for peripheral MRA, consolidating its clinical role for the evaluation of patients with PAD.
Key Points
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Peripheral arterial disease (PAD) represents a common manifestation of systemic atherosclerosis
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Peripheral magnetic resonance angiography (MRA) could aid in the management of patients with PAD and, in particular, in those with an indication for revascularization
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MRA techniques, with and without contrast, can be used in the study of lower-extremity vessels; however, contrast-enhanced MRA represent the preferred approach because of its ability to provide a high-resolution three-dimensional data-set of images
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High-quality peripheral MRA studies incorporate a series of technical advancements (e.g. moving-table technique, parallel imaging, strategies for correct timing of image acquisition)
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With peripheral contrast-enhanced MRA, unwanted venous contrast opacification during image acquisition at the calf level (venous contamination) remains one of the most common pitfalls
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Peripheral MRA is a safe and accurate technique for the diagnosis and management of lower-extremity arterial disease, with important advantages such as safety, higher diagnostic accuracy and better repeatability when compared with other techniques such as invasive angiography CT angiography and duplex ultrasonography
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Acknowledgements
Charles P Vega, University of California, Irvine, CA, is the author of and is solely responsible for the content of the learning objectives, questions and answers of the Medscape-accredited continuing medical education activity associated with this article.
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OP Simonetti has served as Director of Cardiovascular MRI Research and Development at Siemens Medical Solutions, Inc.
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Dellegrottaglie, S., Sanz, J., Macaluso, F. et al. Technology Insight: magnetic resonance angiography for the evaluation of patients with peripheral artery disease. Nat Rev Cardiol 4, 677–687 (2007). https://doi.org/10.1038/ncpcardio1035
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DOI: https://doi.org/10.1038/ncpcardio1035