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Abstract #3480

Influence of Field Strength on the Appearance of Peripheral Vascular Calcifications using Magnetic Resonance Imaging

Ali Serhal1, Ioannis Koktzoglou2,3, Pascale Aouad1, James Carr1, Shivraman Giri4, Omar Morcos5, and Robert R Edelman1,2

1Radiology, Feinberg School of Medicine, Northwestern University, Chicago, IL, United States, 2Radiology, NorthShore University HealthSystem, Evanston, IL, United States, 3Radiology, Prtizker School of Medicine, University of Chicago, Chicago, IL, United States, 4Siemens Healthineers, Chicago, IL, United States, 5Surgery, NorthShore University HealthSystem, Evanston, IL, United States

A major deficiency of MR angiography compared with CT angiography (CTA) has been its inability to detect and characterize peripheral vascular calcifications. Recently, MRI using a proton density-weighted, in-phase stack of stars technique proved capable of identifying these calcifications. However, the diamagnetic susceptibility and short T2* of calcifications have the potential to cause clinically relevant, field strength-dependent changes in lesion appearance with MRI. Since the impact of field strength on the appearance of vascular calcifications is unknown, we performed a two-center clinical study which demonstrated that MRI accurately depicts peripheral vascular calcifications at both 1.5 Tesla and 3.0 Tesla.

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