Fluctuating equilibrium MRI

A new fast, spectrally selective imaging method called fluctuating equilibrium magnetic resonance is presented. With all gradients refocussed over a repetition interval, certain phase schedules of radiofrequency excitation pulses produce an equilibrium magnetization that fluctuates from excitation t...

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Bibliographic Details
Published in:Magnetic resonance in medicine 1999-11, Vol.42 (5), p.876-883
Main Authors: Vasanawala, Shreyas S., Pauly, John M., Nishimura, Dwight G.
Format: Article
Language:English
Subjects:
Abdomen - anatomy & histology
abdominal imaging
Biological and medical sciences
Body Fluids - chemistry
Brain - anatomy & histology
Breast - anatomy & histology
fast imaging
Female
FEMR
fluctuating equilibrium magnetic resonance
Humans
Investigative techniques, diagnostic techniques (general aspects)
lipid suppression
Lipids - chemistry
magnetic resonance angiography
Magnetic Resonance Angiography - methods
Magnetic Resonance Imaging - methods
Medical sciences
Miscellaneous. Technology
MRA
musculoskeletal imaging
Musculoskeletal System - anatomy & histology
Phantoms, Imaging
Radiodiagnosis. Nmr imagery. Nmr spectrometry
steady-state free precession
T2 contrast
Time Factors
Water - analysis
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Summary:A new fast, spectrally selective imaging method called fluctuating equilibrium magnetic resonance is presented. With all gradients refocussed over a repetition interval, certain phase schedules of radiofrequency excitation pulses produce an equilibrium magnetization that fluctuates from excitation to excitation, thus permitting simultaneous acquisition of several images with different contrast features. For example, lipid and water images can be rapidly acquired. The effective echo time can be adjusted using the flip angle, thus providing control over the T2 contribution to the contrast. Several applications of the technique are presented, including fast musculoskeletal, abdominal, breast, and brain imaging, in addition to MR angiography. A technique for combining lipid and water images generated with this sequence for angiography is described and other potential applications are suggested. Magn Reson Med 42:876–883, 1999. © 1999 Wiley‐Liss, Inc.
ISSN:0740-3194
1522-2594
DOI:10.1002/(SICI)1522-2594(199911)42:5<876::AID-MRM6>3.0.CO;2-Z