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Fat attenuation using a dual steady-state balanced-SSFP sequence with periodically variable flip angles.

J Absil·V Denolin·T Metens
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Abstract

A refocused-SSFP sequence based on balanced-FFE (TrueFisp, Fiesta) that attenuates fat signal is presented. The sequence uses periodically variable flip angles and produces a dual steady state of the signal, which is obtained after a dual transient phase if an appropriate preparation is used. The off-resonance profile of the steady-state signal exhibits large stopbands that can be employed for fat suppression. Numerical simulations were performed to investigate the signal behavior and the off-resonance properties of the sequence. Experimental results obtained with a Philips Gyroscan Intera 1.5T MR scanner demonstrated fat attenuation in phantoms and abdominal images in volunteers.

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Abdominal FatArtifactsComputer SimulationHumansImage EnhancementImage Processing, Computer-AssistedMagnetic Resonance ImagingPhantoms, ImagingJournal ArticleResearch Support, Non-U.S. Gov't

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J Absil, V Denolin, T Metens. 2006. Fat attenuation using a dual steady-state balanced-SSFP sequence with periodically variable flip angles.. https://doi.org/10.1002/mrm.20766

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