Pipe James G, Farthing Victoria G, Forbes Kirsten P
MRI Department, Barrow Neurological Institute, Phoenix, Arizona 85013, USA.
Magn Reson Med. 2002 Jan;47(1):42-52. doi: 10.1002/mrm.10014.
A method for obtaining diffusion-weighted images that are free from the artifacts associated with echo-planar acquisitions, such as signal pile-up and geometric warping, is introduced. It uses an ungated, multishot fast spin-echo (FSE) acquisition that is self-navigated. The phase of the refocusing pulses is alternated to minimize non-Carr-Purcell-Meiboom-Gill (CPMG) artifacts. Several reconstruction methods are combined to make this method robust against motion artifacts. Examples are shown of clinical diffusion-weighted imaging and high-resolution diffusion tensor imaging.
介绍了一种获取扩散加权图像的方法，该方法可避免与回波平面采集相关的伪影，如信号堆积和几何扭曲。它使用一种非门控的、多激发快速自旋回波（FSE）采集，这种采集是自导航的。重聚焦脉冲的相位交替以最小化非卡彭-珀塞尔-梅博姆-吉尔（CPMG）伪影。几种重建方法相结合，使该方法对运动伪影具有鲁棒性。展示了临床扩散加权成像和高分辨率扩散张量成像的示例。
