"Shim pulses" for NMR spectroscopy and imaging

Daniel Topgaard; RW Martin; D Sakellariou; CA Meriles; A Pines

doi:10.1073/pnas.0408296102

"Shim pulses" for NMR spectroscopy and imaging

Daniel Topgaard, RW Martin, D Sakellariou, CA Meriles, A Pines

University of California, Berkeley

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

Abstract

A way to use adiabatic radiofrequency pulses and modulated magnetic-field gradient pulses, together constituting a "shim pulse," for NMR spectroscopy and imaging is demonstrated. These pulses capitalize on phase shifts derived from probe gradient coils to compensate for nonlinear intrinsic main magnetic field homogeneity for spectroscopy, as well as for deviations from linear gradients for imaging. This approach opens up the possibility of exploiting cheaper, less-than-perfect magnets and gradient coils for NMR applications.

Original language	English
Pages (from-to)	17576-17581
Journal	Proceedings of the National Academy of Sciences
Volume	101
Issue number	51
DOIs	https://doi.org/10.1073/pnas.0408296102
Publication status	Published - 2004
Externally published	Yes

Subject classification (UKÄ)

Physical Chemistry (including Surface- and Colloid Chemistry)

Free keywords

numerical
pulse sequence
MRI
adiabatic
modulated gradient
optimization

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10.1073/pnas.0408296102

Cite this

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abstract = "A way to use adiabatic radiofrequency pulses and modulated magnetic-field gradient pulses, together constituting a {"}shim pulse,{"} for NMR spectroscopy and imaging is demonstrated. These pulses capitalize on phase shifts derived from probe gradient coils to compensate for nonlinear intrinsic main magnetic field homogeneity for spectroscopy, as well as for deviations from linear gradients for imaging. This approach opens up the possibility of exploiting cheaper, less-than-perfect magnets and gradient coils for NMR applications.",

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T1 - "Shim pulses" for NMR spectroscopy and imaging

AU - Topgaard, Daniel

AU - Martin, RW

AU - Sakellariou, D

AU - Meriles, CA

AU - Pines, A

PY - 2004

Y1 - 2004

N2 - A way to use adiabatic radiofrequency pulses and modulated magnetic-field gradient pulses, together constituting a "shim pulse," for NMR spectroscopy and imaging is demonstrated. These pulses capitalize on phase shifts derived from probe gradient coils to compensate for nonlinear intrinsic main magnetic field homogeneity for spectroscopy, as well as for deviations from linear gradients for imaging. This approach opens up the possibility of exploiting cheaper, less-than-perfect magnets and gradient coils for NMR applications.

AB - A way to use adiabatic radiofrequency pulses and modulated magnetic-field gradient pulses, together constituting a "shim pulse," for NMR spectroscopy and imaging is demonstrated. These pulses capitalize on phase shifts derived from probe gradient coils to compensate for nonlinear intrinsic main magnetic field homogeneity for spectroscopy, as well as for deviations from linear gradients for imaging. This approach opens up the possibility of exploiting cheaper, less-than-perfect magnets and gradient coils for NMR applications.

KW - numerical

KW - pulse sequence

KW - MRI

KW - adiabatic

KW - modulated gradient

KW - optimization

U2 - 10.1073/pnas.0408296102

DO - 10.1073/pnas.0408296102

M3 - Article

SN - 1091-6490

VL - 101

SP - 17576

EP - 17581

JO - Proceedings of the National Academy of Sciences

JF - Proceedings of the National Academy of Sciences

IS - 51

ER -

"Shim pulses" for NMR spectroscopy and imaging

Abstract

Subject classification (UKÄ)

Free keywords

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