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Spatial Normalization of Diffusion Tensor MRI Using Multiple Channels

 Hae-Jeong Park  ;  Marek Kubicki  ;  Carl-Fredrik Westin  ;  Ferenc A. Jolesz  ;  Ron Kikinis  ;  Stephan E. Maier  ;  Robert W. McCarley  ;  Alexandre Guimond  ;  Martha E. Shenton 
 NEUROIMAGE, Vol.20(4) : 1995-2009, 2003 
Journal Title
Issue Date
Adult ; Algorithms ; Brain/anatomy & histology* ; Brain Mapping ; Female ; Humans ; Magnetic Resonance Imaging/standards* ; Male ; Middle Aged ; Nerve Fibers/physiology ; Reference Standards ; Reference Values
diffusion tensor ; spatial normalization ; Tractography
Diffusion Tensor MRI (DT-MRI) can provide important in vivo information for the detection of brain abnormalities in diseases characterized by compromised neural connectivity. To quantify diffusion tensor abnormalities based on voxel-based statistical analysis, spatial normalization is required to minimize the anatomical variability between studied brain structures. In this article, we used a multiple input channel registration algorithm based on a demons algorithm and evaluated the spatial normalization of diffusion tensor image in terms of the input information used for registration. Registration was performed on 16 DT-MRI data sets using different combinations of the channels, including a channel of T2-weighted intensity, a channel of the fractional anisotropy, a channel of the difference of the first and second eigenvalues, two channels of the fractional anisotropy and the trace of tensor, three channels of the eigenvalues of the tensor, and the six channel tensor components. To evaluate the registration of tensor data, we defined two similarity measures, i.e., the endpoint divergence and the mean square error, which we applied to the fiber bundles of target images and registered images at the same seed points in white matter segmentation. We also evaluated the tensor registration by examining the voxel-by-voxel alignment of tensors in a sample of 15 normalized DT-MRIs. In all evaluations, nonlinear warping using six independent tensor components as input channels showed the best performance in effectively normalizing the tract morphology and tensor orientation. We also present a nonlinear method for creating a group diffusion tensor atlas using the average tensor field and the average deformation field, which we believe is a better approach than a strict linear one for representing both tensor distribution and morphological distribution of the population.
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1. College of Medicine (의과대학) > Dept. of Nuclear Medicine (핵의학교실) > 1. Journal Papers
Yonsei Authors
Park, Hae Jeong(박해정) ORCID logo https://orcid.org/0000-0002-4633-0756
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