Three-dimensional fluid attenuated inversion recovery imaging with isotropic resolution and nonselective adiabatic inversion provides improved three-dimensional visualization and cerebrospinal fluid suppression compared to two-dimensional flair at 3 tesla

被引:58
作者
Chagla, Gulzar Hameed [2 ]
Busse, Reed F. [3 ]
Sydnor, Ryan [1 ]
Rowley, Howard A. [1 ]
Turski, Patrick A. [1 ]
机构
[1] Univ Wisconsin, Sch Med & Publ Hlth, Dept Radiol, Madison, WI 53792 USA
[2] Liaquat Natl Hosp, Karachi, Pakistan
[3] GE Healthcare, MR Appl Sci Lab, Madison, WI USA
关键词
isotropic three-dimensional fluid-attenuated inversion recovery; extended echo train; fast spin echo;
D O I
10.1097/RLI.0b013e3181814d28
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
Objectives: In this investigation, we compare two-dimensional (2D) fluid-attenuated inversion recovery (FLAIR) imaging of the brain to an isotropic three-dimensional (31)) FLAIR technique that uses a modulated refocusing flip angle echo train and parallel imaging with 2D acceleration. Materials and Methods: Two-dimensional and 3D FLAIR sequences were obtained in 16 patients. All examinations were performed on a 3 Tesla (T) magnetic resonance (MR) system. Flow artifacts within the subarachnoid space and ventricles were scored using a 4-point scale. For 2D and 3D FLAIR, the signal-to-noise ratios and contrast-to-noise ratios were calculated. Results: Compared to 2D FLAIR, the 3D FLAIR images were less degraded by flow artifacts in the subarachnoid space and ventricle (P < 0.03) based on the qualitative imaging scores. Signal-to-noise ratios and contrast-to-noise ratios were higher for 3D FLAIR (P < 0.02) for all variables when compared with 2D FLAIR sequence. Conclusions: The acquisition time for whole brain isotropic fast spin echo 3D FLAIR can be dramatically reduced by using an extended echo train with flip angle modulation and parallel imaging. The adiabatic, nonselective inversion pulse encompasses the entire volume and provides uniform suppression of the cerebrospinal fluid signal eliminating cerebrospinal fluid pulsation artifacts. Other advantages include reformatting in any desired plane, volume measurements, displays of surface anatomy, and coregistration.
引用
收藏
页码:547 / 551
页数:5
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