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Abstract #0310

A Mechanism for Quantifiable MRI-Based Detection of Cobalt-Chromium Particulate Deposits Near Total Hip Replacements

Kevin M Koch 1 , Matthew F Koff 2 , Parina Shah 2 , and Hollis G Potter 2,3

1 Biophysics and Radiology, Medical College of Wisconsin, Milwaukee, WI, United States, 2 Radiology and Imaging, Hospital for Special Surgery, NYC, NY, United States, 3 Weill Cornell Medical College of Cornell University, NYC, NY, United States

Recent clinical patterns have shown an increasing trend of soft-tissue complications near total hip replacements, particularly those with metal on metal bearing surfaces. The presence of substantial metallic debris can highlight implant malfunction correlated to wear of the bearing surfaces. Metallic debris generates a resonance frequency shift that can be detected using MRI methods. Unfortunately, conventional image artifacts confound traditional methods for detailed frequency shift assessments near implants. Here, we demonstrate quantifiable image contrast highlighting cobalt-chromium particle deposits near metal implants using MAVRIC field maps and locally applied dipolar projection background field removal methods.

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