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Journal of Magnetic Resonance
Volume 171, Issue 1, November 2004, Pages 131-134
 
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doi:10.1016/j.jmr.2004.08.005    How to Cite or Link Using DOI (Opens New Window)
Copyright © 2004 Elsevier Inc. All rights reserved.

Communication

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

C.A. CorumCorresponding Author Contact Information, E-mail The Corresponding Author, E-mail The Corresponding Author and A.F. Gmitro

Optical Sciences Center, University of Arizona, AHSC, P.O. Box 245067, Tucson, AZ 85724-5067, USA

Received 1 April 2004; 
revised 28 July 2004. 
Available online 17 September 2004.

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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 View the MathML source profile. This is true even in a homogeneous single-component sample. We have developed an analytical expression for the View the MathML source 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 View the MathML source profile after establishing the steady state.

Keywords: Distant dipolar field; DDF; Intermolecular multiple quantum coherence; iMQC; Steady state longitudinal magnetization

PACS: 82.56.Jn; 82.56.Na; 87.61.Cd

Article Outline

1. Introduction
2. Experimental methods
3. Theory
4. Results
5. Conclusions
Acknowledgements
References





 
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