IMPROVED T1-WEIGHTED 2-DIMENSIONAL MP-GRE IMAGING OF THE LIVER WITH VARIABLE FLIP ANGLES FOR SHAPING THE SIGNAL EVOLUTION

被引：6

作者：

EPSTEIN, FH ^{[1
]}

MUGLER, JP ^{[1
]}

BROOKEMAN, JR ^{[1
]}

机构：

[1] UNIV VIRGINIA,HLTH SCI CTR,DEPT RADIOL,MRI FACIL,CHARLOTTESVILLE,VA 22908

来源：

JMRI-JOURNAL OF MAGNETIC RESONANCE IMAGING | 1994年 / 4卷 / 01期

关键词：

LIVER; MR; MODEL; MATHEMATICAL; PULSE SEQUENCES; RAPID IMAGING;

D O I：

10.1002/jmri.1880040118

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：

The recently introduced method of shaping the transient signal evolution in magnetization-prepared gradient-echo (MP-GRE) imaging with variable flip angles has been applied to two-dimensional (2D) MP-GRE imaging of the abdomen. The technique was analyzed by using theoretical models and was implemented on a standard 1.5-T whole-body imager with a segmented acquisition. Theoretical models predicted that the variable-flip-angle 2D MP-GRE sequence would increase liver-spleen signal difference-to-noise ratios by 290%, 110%, and 160% compared with a 2D MP-GRE sequence with a flip angle of 10-degrees and sequential phase encoding. a 2D MP-GRE sequence with a flip angle of 30-degrees and centric phase encoding, and the fast low-angle shot sequence, respectively. Experimental measurements supported the theoretical predictions.

引用

页码：91 / 98

页数：8

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