Abstract #1404

Joint effusion contrast differences in 2D fat-saturated T2-weighted pulse sequences in 3T and 7T MRI

Sina Tafti^1,2, Bruce Damon³, and Dean Hoffmeister⁴

¹Siemens Medical Solutions USA, Inc., Urbana, IL, United States, ²Beckman Institute, University of Illinois at Urbana-Champaign, Urbana, IL, United States, ³Stevens Family Clinical Research Institute, Carle Health, Urbana, IL, United States, ⁴Radiology, Carle Health, Urbana, IL, United States

Synopsis

7T MRI provides excellent resolution of the structures in the knee. Fat-saturated T2-weighted imaging at 7T has been used clinically for assessing knee joint effusion, but may provide different contrast than 3T MRI in cases of acute injury involving suspected blood products in the fluid. Here, we show three cases in which joint effusion due to acute injury had dark contrast in T2-weighted images acquired at 7T. For one case, T2-weighted 3T MRI was acquired in which the effusion appeared bright. These differences illustrate the potential for high field MRI to elucidate pathological components not observable at lower field strength.

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