Spatially varying steady state longitudinal magnetization in distant dipolar field-based sequences

C. A. Corum, A. F. Gmitro

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Sequences based on the distant dipolar field (DDF) have shown great promise for novel spectroscopy and imaging. Unless spatial variation in the longitudinal magnetization, Mz(s), is eliminated by relaxation, diffusion, or spoiling techniques by the end of a single repetition, unexpected results can be obtained due to spatial harmonics in the steady state M zss(s) profile. This is true even in a homogeneous single-component sample. We have developed an analytical expression for the Mzss(s) profile that occurs in DDF sequences when smearing by diffusion is negligible in the TR period. The expression has been verified by directly imaging the Mzss(s) profile after establishing the steady state.

Original languageEnglish (US)
Pages (from-to)131-134
Number of pages4
JournalJournal of Magnetic Resonance
Volume171
Issue number1
DOIs
StatePublished - Nov 2004

Bibliographical note

Funding Information:
This work and preparation leading to it was carried out under the support of the Flinn Foundation, a State of Arizona Prop. 301 Imaging Fellowship, and NIH 5R24CA083148-05.

Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.

Keywords

  • DDF
  • Distant dipolar field
  • IMQC
  • Intermolecular multiple quantum coherence
  • Steady state longitudinal magnetization

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