Compensation for spin-lock artifacts using an off-resonance rotary echo in T1rhooff-weighted imaging.

Compensation for spin-lock artifacts using an off-resonance rotary echo in T1rhooff-weighted imaging. Research Abstract Details 

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Compensation for spin-lock artifacts using an off-resonance rotary echo in T1rhooff-weighted imaging. Abstract Text:

Walter R T Witschey,Arijitt Borthakur,Mark A Elliott,Eric Mellon,Sampreet Niyogi,Chenyang Wang,Ravinder Reddy,

The origin of image artifacts in an off-resonance spin-locking experiment is shown to be imperfections in the excitation flip angle. A pulse sequence for off-resonance spin locking is implemented that compensates for imperfections in the excitation flip angle through an off-resonance rotary echo. The off-resonance rotary echo alternates the frequency offset and phase of the RF transmitter during two spin-locking pulses of equal duration. The underlying theory is detailed, and MR images demonstrate the effectiveness of the technique in agarose gel phantoms and in in vivo human brain at 3T.

Compensation for spin-lock artifacts using an off-resonance rotary echo in T1rhooff-weighted imaging. Publishing Authors By Initials

WR Witschey,A Borthakur,MA Elliott,E Mellon,S Niyogi,C Wang,R Reddy,

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Compensation for spin-lock artifacts using an off-resonance rotary echo in T1rhooff-weighted imaging. Journal Published:

PUBLICATION TYPE: Research Support, N.I.H., Extr

Journal: Magnetic resonance in medicine : official journal

VOLUME: 57

Page Numbers: 2-7

Journal Abbreviation:

ISSN: 0740-3194

DAY: 3

MONTH: Jan

YEAR: 2007

Compensation for spin-lock artifacts using an off-resonance rotary echo in T1rhooff-weighted imaging. Information

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LANGUAGE: eng

NlmUniqueID: 8505245

Compensation for spin-lock artifacts using an off-resonance rotary echo in T1rhooff-weighted imaging. Keywords Mesh Terms:

KEYWORDS: Reference Values

MESH TERMS: methods

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Grant and Affiliation Information for Compensation for spin-lock artifacts using an off-resonance rotary echo in T1rhooff-weighted imaging.

AFFILIATION: Department of Biochemistry & Molecular Biophysics, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6100, USA. witschey@med.upenn.edu

Country: United States

AGENCY: United States NIAMS

GRANT: R01AR051041

ACRONYM: AR

MEDLINETA: Magn Reson Med

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