Fluctuating equilibrium MRI.
A new fast, spectrally selective imaging method called fluctuating equilibrium magnetic resonance is presented. With all gradients refocused 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 T(2) 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.
Vasanawala
S S
SS
Magnetic Resonance Systems Research Laboratory, Department of Electrical Engineering, Stanford University, Stanford, California 94305-9510, USA. vasanawala@stanford.edu
Pauly
J M
JM
Nishimura
D G
DG
D000005:Abdomen / Q000033:anatomy & histology; D001826:Body Fluids / Q000737:chemistry; D001921:Brain / Q000033:anatomy & histology; D001940:Breast / Q000033:anatomy & histology; D005260:Female; D006801:Humans; D008055:Lipids / Q000737:chemistry; D018810:Magnetic Resonance Angiography / Q000379:methods; D008279:Magnetic Resonance Imaging / Q000379:methods*; D009141:Musculoskeletal System / Q000033:anatomy & histology; D019047:Phantoms, Imaging; D013997:Time Factors; D014867:Water / Q000032:analysis
D008055:Lipids; D014867:Water