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Abstract #2791

Quantitative Assessment of Diffusion Weighted Imaging Near Metal Implants

John P. Neri1, Matthew F. Koff1, Kevin M. Koch2, and Ek T. Tan1
1Hospital for Special Surgery, New York, NY, United States, 2Medical College of Wisconsin, Milwaukee, WI, United States


Conventional echo-planar imaging (EPI) DWI suffers from substantial artifact when imaging orthopedic hardware. DWI with multi-acquisition with variable resonance image combination (MAVRIC) can reduce susceptibility artifact around metal implants. The purpose of this work was to evaluate the quantitative accuracy of DWI-MAVRIC near metal components using a diffusion phantom. DWI-MAVRIC sequences were acquired in the presence of no metal, cobalt-chromium, titanium, and stainless steel. It was found that DWI-MAVRIC can accurately measure apparent diffusion coefficient (ADC) in the presence of metal. Among tested metals, stainless steel creates the greatest artifact that prevented the acquisition of accurate ADC data.

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