Abstract
Carotid plaque MRI can identify components indicative of stroke risk, including the thin/ruptured fibrous cap and lipid core. Gadolinium contrast, typically administered for routine MR angiography acquisitions, can be used to improve plaque characterization, extending risk assessment beyond the plaque's hemodynamic impact on the lumen. Gadolinium preferentially enhances the cap, improves reliability of vessel wall measurements, and highlights neovessels, improving stroke risk stratification. Additionally, the precontrast series from the contrast-enhanced MR angiography can help identify intraplaque hemorrhage, another important risk marker. Prospective validation of these features is needed to develop a carotid plaque risk profile for clinical implementation.
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