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Abstract #4134

Active Shimming of Metallic Probes for Interventional MRI

Saikat Sengupta1 and Xinqiang Yan1
1Department of Radiology, Vanderbilt University Institute of Imaging Science, Nashville, TN, United States

Artifacts caused by large magnetic susceptibility differences between metallic probes and the surrounding tissue are a persistent problem in interventional MRI. In 2019, we presented the concept, design and modeling of active shims for metallic probes inspired from naval degaussing systems. Field disturbance induced by a metallic probe at 3 Tesla was modeled and an active shim insert design was presented to shim the field variation around the probe. In this abstract we present the first experimental results showing effective recovery of metallic probe induced signal loss at 3 Tesla.

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