... 256 mm，矩阵 256 × 256，体素 1.0 mm× 1.0 mm× 1.0 mm，翻转角：9°；静息态fMRI 扫描序列采 用梯度回波-平面回波序列(GRE-EPI): TR/TE= 2330/30 ms，层厚 3 mm，层数 36 FOV=240 mm× 240mm，矩阵 64 × 64，体素 3.8 mm× 3.8 mm× 3.0 mm，翻转角：90°。
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扫描技术为梯度回波单次激发平面回波成像(gradient echo-echo planar imaging, GRE-EPI)序列；词语联想任务扫描参数如下：TR/TE=2500/60ms, FOV=24cm, Matrix=...
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扫描序列为梯度回波单次激发平面回波成像(gradient echo-echo planar imaging, GRE-EPI); TR/TE=2500/60ms, FOV=24cm, Matrix=64×64,层厚=5mm,层...
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Therefore, to retain the original GRE pulse sequence form, we combined different K space-filling model of the EPI form with several different GRE-EPI sequences.
因此，保留GRE序列原有的脉冲形式，并与不同K空间填充模式的EPI相结合形成几种不同的GRE - EPI序列。
During analyzing the timing diagrams and K space-filling models of these several different GRE-EPI sequences, the BEST series is selected to combine with GRE sequence to improve SWI.
对这几种不同gre - EPI序列的时序图和K空间填充模式进行分析之后，选定与BEST序列相结合的GRE - EPI序列来改进SWI。
Metal artifact around the crown was found on all images with different size and shape. In the T1, T2, PD, GRE images, the artifacts were circular. While in the GE EPI images which were patch-shaped.
铸造冠周围组织的影像在T1、T2、PD、GRE畸变为近似圆形的低信号金属伪影，在GE EPI畸变为大范围的不规则的片状信号失落；
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