Abstract #0003

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

Sai Abitha Srinivas^1,2, Stephen F Cauley^3,4, Jason P Stockmann^3,4, Charlotte R Sappo^1,2, Christopher E Vaughn^1,2, Lawrence Wald^3,4,5, William Grissom^1,2,6,7, and Clarissa Cooley^3,4

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

Synopsis

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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