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

C. A. Corum; A. F. Gmitro

doi:10.1016/j.jmr.2004.08.005

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

C. A. Corum, A. F. Gmitro

Research output: Contribution to journal › Article › peer-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, M_z(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 _z^ss(s) profile. This is true even in a homogeneous single-component sample. We have developed an analytical expression for the M_z^ss(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 M_z^ss(s) profile after establishing the steady state.

Original language	English (US)
Pages (from-to)	131-134
Number of pages	4
Journal	Journal of Magnetic Resonance
Volume	171
Issue number	1
DOIs	https://doi.org/10.1016/j.jmr.2004.08.005
State	Published - Nov 2004

Keywords

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

ASJC Scopus subject areas

Biophysics
Biochemistry
Nuclear and High Energy Physics
Condensed Matter Physics

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10.1016/j.jmr.2004.08.005

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title = "Spatially varying steady state longitudinal magnetization in distant dipolar field-based sequences",

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.",

keywords = "DDF, Distant dipolar field, IMQC, Intermolecular multiple quantum coherence, Steady state longitudinal magnetization",

author = "Corum, {C. A.} and Gmitro, {A. F.}",

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.",

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AU - Corum, C. A.

AU - Gmitro, A. F.

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PY - 2004/11

Y1 - 2004/11

N2 - 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.

AB - 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.

KW - DDF

KW - Distant dipolar field

KW - IMQC

KW - Intermolecular multiple quantum coherence

KW - Steady state longitudinal magnetization

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

Abstract

Keywords

ASJC Scopus subject areas

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