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Abstract #0855

Minimal Artifact Actively Shimmed Metallic Needles for Interventional MRI

Saikat Sengupta1, Xinqiang Yan1, Tamarya Hoyt2, Anthony Gunderman3, and Yue Chen3
1Department of Radiology, Vanderbilt University Institute of Imaging Science, Nashville, TN, United States, 2Department of Radiology, Vanderbilt University Medical Center, Nashville, TN, United States, 3Department of Mechanical Engineering, University of Arkansas, Fayetteville, AR, United States

Artifacts caused by large magnetic susceptibility differences between metallic probes and the surrounding tissue are a persistent problem in many interventional MRI applications. In previous work, we presented the concept, design and modeling of active shims for metallic needles. In this work, we present the experimental demonstration of recovery of metallic probe induced signal loss at 3 Tesla. Effective recovery of lost signal and correction of field inhomogeneity is shown across needle orientations and imaging sequences.

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