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

par Absil, Julie ;Denolin, Vincent ;Metens, Thierry
Référence Magnetic resonance in medicine, 55, 2, page (343-351)
Publication Publié, 2006-02

Article révisé par les pairs

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Résumé :

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.