OPTIMIZATION OF 3-DIMENSIONAL T1-WEIGHTED GRADIENT-ECHO IMAGING OF THE CERVICAL-SPINE

被引:6
作者
ROSS, JS
TKACH, JA
DILLINGER, J
RUGGIERI, PM
MASARYK, TJ
MODIC, MT
机构
[1] Division of Radiology, Cleveland Clinic Foundation, Cleveland, Ohio, 44195-5129
来源
JMRI-JOURNAL OF MAGNETIC RESONANCE IMAGING | 1992年 / 2卷 / 03期
关键词
PULSE SEQUENCES; RAPID IMAGING; SPINE; MR; 3-DIMENSIONAL IMAGING;
D O I
10.1002/jmri.1880020318
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
Various parameters of the three-dimensional (3D) T1-weighted magnetization-prepared rapid acquisition gradient-echo (MP-RAGE) sequence were evaluated to improve spatial resolution while maintaining T1 contrast and a short examination time in imaging of the cervical spine in volunteers. The most dramatic improvements in image resolution occurred by decreasing section thickness to 1.2 mm and increasing the in-plane matrix to 192 x 256. with a 230-mm field of view. The increase in imaging time due to the increased matrix was offset by the elimination of the preparation pulse and wait time, without dramatic changes in contrast-to-noise ratio or overall image quality. Optimum parameters included elimination of the preparation pulse and wait time, 12-degrees flip angle, 192 x 256 matrix, 1.2-mm section thickness, nonselective excitation (coronal acquisition), RF spoiling. and standard k-space ordering, for an examination time of 5 minutes 21 seconds.
引用
收藏
页码:359 / 364
页数:6
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