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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