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Abstract #0003

External Dynamic InTerference Estimation and Removal (EDITER) for low field MRI

Sai Abitha Srinivas1,2, Stephen F Cauley3,4, Jason P Stockmann3,4, Charlotte R Sappo1,2, Christopher E Vaughn1,2, Lawrence Wald3,4,5, William Grissom1,2,6,7, and Clarissa Cooley3,4
1Vanderbilt University Institute of Imaging Science, Nashville, TN, United States, 2Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, United States, 3Harvard Medical School, Boston, MA, United States, 4Dept. of Radiology, Massachusetts General Hospital, Athinoula A Martinos Center for Biomedical Imaging, Boston, MA, United States, 5Harvard-MIT Division of Health Sciences and Technology, Cambridge, MA, United States, 6Department of Electrical Engineering, Vanderbilt University, Nashville, TN, United States, 7Department of Radiology, Vanderbilt University, Nashville, TN, United States


Point of care MRI requires operation outside of an MR shielded room where electromagnetic interference can degrade image quality. To address this, we demonstrate a self-calibrated generalized dynamic model to retrospectively remove time-varying external interference. The method uses data acquired from multiple Electromagnetic Interference (EMI) detectors simultaneous with the primary MR coil. We test the approach both in a controlled EMI setting on an 80mT Halbach scanner and an uncontrolled real-world EMI setting on a 47.5mT permanent magnet open MRI system.

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