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

ABSTRACT:

Purpose

Point-of-care MRI requires operation outside of Faraday shielded rooms normally used to block image-degrading electromagnetic interference (EMI). To address this, we introduce the EDITER method (External Dynamic InTerference Estimation and Removal), an external sensor-based method to retrospectively remove image artifacts from time-varying external interference sources.

Theory and methods

The method acquires data from multiple EMI detectors (tuned receive coils as well as untuned electrodes placed on the body) simultaneously with the primary MR coil during and between image data acquisition. We calculate impulse response functions dynamically that map the data from the detectors to the time varying artifacts then remove the transformed detected EMI from the MR data.

SUBMITTER: Srinivas SA 

PROVIDER: S-EPMC8920578 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature