Comparison of fast acquisition strategies in whole-heart four-dimensional flow cardiac MR: Two-center, 1.5 Tesla, phantom and in vivo validation study
Comparison of fast acquisition strategies in whole-heart four-dimensional flow cardiac MR: Two-center, 1.5 Tesla, phantom and in vivo validation study
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DOI：
10.1002/jmri.25746
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发表时间：
2018-01-01
影响因子：
4.4
通讯作者：
Plein, Sven
中科院分区：
文献类型：
--
作者：
Garg, Pankaj;Westenberg, Jos J. M.;Plein, Sven
PurposeTo validate three widely-used acceleration methods in four-dimensional (4D) flow cardiac MR; segmented 4D-spoiled-gradient-echo (4D-SPGR), 4D-echo-planar-imaging (4D-EPI), and 4D-k-t Broad-use Linear Acquisition Speed-up Technique (4D-k-t BLAST).Materials and MethodsAcceleration methods were investigated in static/pulsatile phantoms and 25 volunteers on 1.5 Tesla MR systems. In phantoms, flow was quantified by 2D phase-contrast (PC), the three 4D flow methods and the time-beaker flow measurements. The later was used as the reference method. Peak velocity and flow assessment was done by means of all sequences. For peak velocity assessment 2D PC was used as the reference method. For flow assessment, consistency between mitral inflow and aortic outflow was investigated for all pulse-sequences. Visual grading of image quality/artifacts was performed on a four-point-scale (0=no artifacts; 3=nonevaluable).ResultsFor the pulsatile phantom experiments, the mean error for 2D PC=1.01.1%, 4D-SPGR=4.91.3%, 4D-EPI=7.61.3% and 4D-k-t BLAST=4.41.9%. In vivo, acquisition time was shortest for 4D-EPI (4D-EPI=8 +/- 2min versus 4D-SPGR=9 +/- 3min, P
