Mukherjee P, Chung S W, Berman J I, Hess C P, Henry R G
Department of Radiology, University of California, San Francisco, San Francisco, CA 94143-0628, USA.
AJNR Am J Neuroradiol. 2008 May;29(5):843-52. doi: 10.3174/ajnr.A1052. Epub 2008 Mar 13.
This second article of the 2-part review builds on the theoretic background provided by the first article to cover the major technical factors that affect image quality in diffusion imaging, including the acquisition sequence, magnet field strength, gradient amplitude, and slew rate as well as multichannel radio-frequency coils and parallel imaging. The sources of many common diffusion image artifacts are also explored in detail. The emphasis is on optimizing these technical factors for state-of-the-art diffusion-weighted imaging and diffusion tensor imaging (DTI) based on the best available evidence in the literature. An overview of current methods for quantitative analysis of DTI data and fiber tractography in clinical research is also provided.
这篇分为两部分的综述的第二篇文章，基于第一篇文章提供的理论背景，涵盖了影响扩散成像中图像质量的主要技术因素，包括采集序列、磁场强度、梯度幅度和 slew 率，以及多通道射频线圈和平行成像。还详细探讨了许多常见扩散图像伪影的来源。重点是根据文献中现有的最佳证据，为先进的扩散加权成像和扩散张量成像（DTI）优化这些技术因素。还提供了临床研究中 DTI 数据定量分析和纤维束成像的当前方法概述。
