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Abstract #1275

Effect of Dilution of Different Gadolinium Agents on Signal Intensity at 1.5 Tesla: Implications for Direct MR Arthrography

Roula Bou Sader 1 , William B. Morrison 2 , Alex Dresner 2 , Luke Maj 2 , Yulia Gombar 2 , and Adam Zoga 2

1 Radiology, Thomas Jefferson University Hospital, Philadelphia, PA, United States, 2 Thomas Jefferson University Hospital, PA, United States

We sought to optimize direct MR arthrography by determining the optimal concentration of three contrast agents. Magnevist, Gadavist and Optimark dilutions were scanned at 1.0, 1.5T, and 3.0T. On T1-SE, all contrast agents tested showed peak signal at a dilution of 2.0-2.6 mmol/L. On FSE-PD and T2, signal decreased rapidly with increasing concentrations. On 2D-GRE, there was less variation in signal intensity, with a peak at 2.0 mmol/L for each contrast agent. On STIR imaging two peaks were observed, one at the minimum concentration and another at 4.0 mmol/L. There was very little difference between contrast agents tested.

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