Format

Send to:

Choose Destination
See comment in PubMed Commons below
Neuroimage. 2010 May 15;51(1):206-13. doi: 10.1016/j.neuroimage.2010.01.101. Epub 2010 Feb 12.

Improved tractography alignment using combined volumetric and surface registration.

Author information

  • 1Martinos Center for Biomedical Imaging, MGH, Boston, MA, USA. lzollei@nmr.mgh.harvard.edu

Abstract

Previously we introduced an automated high-dimensional non-linear registration framework, CVS, that combines volumetric and surface-based alignment to achieve robust and accurate correspondence in both cortical and sub-cortical regions (Postelnicu et al., 2009). In this paper we show that using CVS to compute cross-subject alignment from anatomical images, then applying the previously computed alignment to diffusion weighted MRI images, outperforms state-of-the-art techniques for computing cross-subject alignment directly from the DWI data itself. Specifically, we show that CVS outperforms the alignment component of TBSS in terms of degree-of-alignment of manually labeled tract models for the uncinate fasciculus, the inferior longitudinal fasciculus and the corticospinal tract. In addition, we compare linear alignment using FLIRT based on either fractional anisotropy or anatomical volumes across-subjects, and find a comparable effect. Together these results imply a clear advantage to aligning anatomy as opposed to lower resolution DWI data even when the final goal is diffusion analysis.

Copyright (c) 2010 Elsevier Inc. All rights reserved.

PMID:
20153833
[PubMed - indexed for MEDLINE]
PMCID:
PMC2847021
Free PMC Article
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Elsevier Science Icon for PubMed Central
    Loading ...
    Write to the Help Desk