A B(0) shift correction method based on edge RMS reduction for EPI fMRI

Peter V. Kochunov, Ho Ling Liu, Trevor Andrews, Jia Hong Gao, Peter T. Fox, Jack L. Lancaster

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Shifting of echoplanar images (EPI) in the phase-encoding direction during functional magnetic resonance imaging (fMRI) experiments can be observed due to B(o) drift. These shifts can cause artifacts in functional activation maps that can be corrected using a navigator echo (NE) technique, but the NE correction requires pulse sequence modifications not available on many clinical systems. A fast, postprocessing correction method based on edge root-mean-square error reduction (ERMSR) is introduced and shown to provide an equivalent correction. (C) 2000 Wiley-Liss, Inc.

Original languageEnglish (US)
Pages (from-to)956-959
Number of pages4
JournalJournal of Magnetic Resonance Imaging
Volume12
Issue number6
DOIs
StatePublished - 2000

Keywords

  • Algorithm
  • Artifacts
  • B(0) shift
  • MRI
  • Navigator echo
  • fMRI

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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