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Abstract #1197

Non-contrast Diffusion-weighted MRI for Detection of Synovitis using DESS

Emily J McWalter 1 , Bragi Sveinsson 1 , Edwin H Oei 1,2 , William H Robinson 1 , Mark C Genovese 1 , Garry E Gold 1 , and Brian A Hargreaves 1

1 Stanford University, Stanford, CA, United States, 2 Erasmus MC, Netherlands

Synovitis is frequently observed osteoarthritis and is characterized by synovial thickening and joint effusion. Contrast enhanced T1-weighted imaging is the current gold standard for detecting synovitis; however, introducing contrast enhanced images at the end of a knee protocol increases time, cost and risk to patients. We propose double echo in the steady state (DESS) imaging for synovitis detection without the need for administration of an intravenous contrast agent and demonstrate that with a linear combination of the DESS echoes, improved contrast between the synovial membrane and fluid can be achieved.

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