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

被引：18
作者：
Absil, J
Denolin, V
Metens, T
机构：
[1] Free Univ Brussels, Hop Erasme, Unite IRM Radiol, B-1070 Brussels, Belgium
[2] Univ Libre Bruxelles, Fac Sci, CENOLI, Brussels, Belgium
来源：
MAGNETIC RESONANCE IN MEDICINE | 2006年 / 55卷 / 02期
关键词：
steady-state free precession; fast imaging; variable flip angles; fat suppression; off-resonance profile;
D O I：
10.1002/mrm.20766
中图分类号：
R8 [特种医学]; R445 [影像诊断学];
学科分类号：
1002 ; 100207 ; 1009 ;
摘要：
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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收藏
页码：343 / 351
页数：9
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