Carotid bifurcation: Evaluation of time-resolved three-dimensional contrast-enhanced MR angiography

被引:36
|
作者
Carroll, TJ
Korosec, FR
Petermann, GM
Grist, TM
Turski, PA
机构
[1] Univ Wisconsin, Clin Sci Ctr E3 311, Dept Phys Med, Madison, WI 53792 USA
[2] Univ Wisconsin, Clin Sci Ctr E3 311, Dept Radiol, Madison, WI 53792 USA
[3] Tripler Army Med Ctr, Dept Radiol, Honolulu, HI 96859 USA
关键词
carotid arteries; MR; magnetic resonance (MR); technology;
D O I
10.1148/radiology.220.2.r01au43525
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 magnetic resonance (MR) angiographic protocol was evaluated in the carotid bifurcation with use of a pulse sequence for time-resolved three-dimensional imaging of contrast material kinetics. The enhancement ratio, a quantitative measure of contrast enhancement, indicated that all studies included an image obtained near the peak of the intraarterial concentration of contrast agent (enhancement ratio, 90% +/- 9 [standard deviation]). Studies acquired at a higher frame rate (4.1-4.9 seconds) exhibited less venous enhancement (enhancement ratio, 25% +/- 16) than studies acquired with slower (6.0-9.6-second) frame rates (enhancement ratio, 46% +/- 25).
引用
收藏
页码:525 / 532
页数:8
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