期刊
NMR IN BIOMEDICINE
卷 23, 期 7, 页码 794-802出版社
WILEY
DOI: 10.1002/nbm.1490
关键词
diffusion; DTI; motion; b-matrix correction; high-resolution DTI
资金
- NIH [2R01EB002711, 1R01EB008706, 1R21EB006860]
- Center of Advanced MR Technology at Stanford [P41RR09784]
- Lucas Foundation
- Oak Foundation
Short-axis PROPELLER-EPI (SAP-EPI) has been proven to be very effective in providing high-resolution diffusion-weighted and diffusion tensor data. The self-navigation capabilities of SAP-EPI allow one to correct for motion, phase errors, and geometric distortion. However, in the presence of patient motion, the change in the effective diffusion-encoding direction (i.e. the b-matrix) between successive PROPELLER 'blades' can decrease the accuracy of the estimated diffusion tensors, which might result in erroneous reconstruction of white matter tracts in the brain. In this study, we investigate the effects of alterations in the b-matrix as a result of patient motion on the example of SAP-EPI DTI and eliminate these effects by incorporating our novel single-step non-linear diffusion tensor estimation scheme into the SAP-EPI post-processing procedure. Our simulations and in-vivo studies showed that, in the presence of patient motion, correcting the b-matrix is necessary in order to get more accurate diffusion tensor and white matter pathway reconstructions. Copyright (C) 2010 John Wiley & Sons, Ltd.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据