An analysis of the intrinsic resonance offset dependence of magnetization generated by stimulated echo pulse sequences for noncoupled spins

D. Ballon; M. Garwood; J. A. Koutcher

doi:10.1016/0730-725X(91)90044-M

An analysis of the intrinsic resonance offset dependence of magnetization generated by stimulated echo pulse sequences for noncoupled spins

D. Ballon, M. Garwood, J. A. Koutcher

Center for Magnetic Resonance Research

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

It is demonstrated that the basic radiofrequency pulse train used to generate stimulated echoes (90_x-τ_TE-90_x-τ_TM-90_x-τ_TE-Acq.) is in general characterized by strong amplitude and phase modulations of the transverse magnetization as a function of the resonance offset. Two dephasing techniques which eliminate the modulations are investigated both theoretically and experimentally, and a simple formula is derived for calculating the relative modulation across a spectrum as a function of gradient strength and duration, echo delay, and spectral linewidth.

Original language	English (US)
Pages (from-to)	569-575
Number of pages	7
Journal	Magnetic Resonance Imaging
Volume	9
Issue number	4
DOIs	https://doi.org/10.1016/0730-725X(91)90044-M
State	Published - 1991

Bibliographical note

Funding Information:
Acknowledgments-This research was supported in part by NIH grants #HL32427, #CA50703, and #R29CA43841.

Keywords

In vivo spectroscopy
Resonance offset
STEAM
Spectroscopic localization
Stimulated echo

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abstract = "It is demonstrated that the basic radiofrequency pulse train used to generate stimulated echoes (90x-τTE-90x-τTM-90x-τTE-Acq.) is in general characterized by strong amplitude and phase modulations of the transverse magnetization as a function of the resonance offset. Two dephasing techniques which eliminate the modulations are investigated both theoretically and experimentally, and a simple formula is derived for calculating the relative modulation across a spectrum as a function of gradient strength and duration, echo delay, and spectral linewidth.",

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note = "Funding Information: Acknowledgments-This research was supported in part by NIH grants #HL32427, #CA50703, and #R29CA43841.",

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doi = "10.1016/0730-725X(91)90044-M",

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T1 - An analysis of the intrinsic resonance offset dependence of magnetization generated by stimulated echo pulse sequences for noncoupled spins

AU - Ballon, D.

AU - Garwood, M.

AU - Koutcher, J. A.

N1 - Funding Information: Acknowledgments-This research was supported in part by NIH grants #HL32427, #CA50703, and #R29CA43841.

PY - 1991

Y1 - 1991

N2 - It is demonstrated that the basic radiofrequency pulse train used to generate stimulated echoes (90x-τTE-90x-τTM-90x-τTE-Acq.) is in general characterized by strong amplitude and phase modulations of the transverse magnetization as a function of the resonance offset. Two dephasing techniques which eliminate the modulations are investigated both theoretically and experimentally, and a simple formula is derived for calculating the relative modulation across a spectrum as a function of gradient strength and duration, echo delay, and spectral linewidth.

AB - It is demonstrated that the basic radiofrequency pulse train used to generate stimulated echoes (90x-τTE-90x-τTM-90x-τTE-Acq.) is in general characterized by strong amplitude and phase modulations of the transverse magnetization as a function of the resonance offset. Two dephasing techniques which eliminate the modulations are investigated both theoretically and experimentally, and a simple formula is derived for calculating the relative modulation across a spectrum as a function of gradient strength and duration, echo delay, and spectral linewidth.

KW - In vivo spectroscopy

KW - Resonance offset

KW - STEAM

KW - Spectroscopic localization

KW - Stimulated echo

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An analysis of the intrinsic resonance offset dependence of magnetization generated by stimulated echo pulse sequences for noncoupled spins

Abstract

Bibliographical note

Keywords

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