Simultaneous echo refocusing in EPI
Simultaneous echo refocusing in EPI
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DOI：
10.1002/mrm.10227
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发表时间：
2002-07-01
影响因子：
3.3
通讯作者：
Wedeen, VJ
中科院分区：
文献类型：
--
作者：
Feinberg, DA;Reese, TG;Wedeen, VJ
提出了一种在单个回波串内对多个二维傅里叶变换（2D FT）图像进行编码的方法。这种新的方法，同时回波重聚焦（SER），是从以前的回波平面图像（EPI）序列，使用重复的单次发射回波序列多层成像的出发。SER利用共享的重新聚焦过程在单次激发回波序列中同时采集多个切片。SER技术比传统的多层EPI更快地采集数据，因为它使用更少的梯度切换和更少的准备脉冲，如扩散梯度。SER引入了一种新的功能，可以在亚秒级图像采集中同时记录多个空间分离的生理信息源，这使得几种依赖于MRI数据中时间相干性的应用成为可能，包括速度矢量场映射和大脑激活映射。(C)2002 Wiley-Liss，Inc.
A method to encode multiple two-dimensional Fourier transform (2D FT) images within a single echo train is presented. This new method, simultaneous echo refocusing (SER), is a departure from prior echo planar image (EPI) sequences which use repeated single-shot echo trains for multislice imaging. SER simultaneously acquires multiple slices in a single-shot echo train utilizing a shared refocusing process. The SER technique acquires data faster than conventional multislice EPI since it uses fewer gradient switchings and fewer preparation pulses such as diffusion gradients. SER introduces a new capability to simultaneously record multiple spatially separated sources of physiologic information in subsecond image acquisitions, which enables several applications that are dependent on temporal coherence in MRI data including velocity vector field mapping and brain activation mapping. (C) 2002 Wiley-Liss, Inc.