Quantitative assessment of motion correction for high angular resolution diffusion imaging
نویسندگان
چکیده
منابع مشابه
Diffusion Simulation Tractography for High Angular Resolution Diffusion Imaging
Introduction While the standard diffusion tensor imaging (DTI) approach has proven to be a valuable tool in detecting local tissue structure and reconstructing neural fiber networks in brain, it cannot accurately reveal the white matter structure in the presence of multiple fiber orientations within a single voxel. In particular, for crossed fibers, the second-order diffusion tensor model fails...
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Two canonical representations for regularization of unit sphere functions encountered in the context of high angular resolution diffusion imaging (HARDI) are discussed. One of these is based on spherical harmonic decomposition, and its one-parameter extension via Tikhonov regularization. This case is well-established, and is mainly reviewed for the sake of completeness. The second one is new, a...
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Diffusion MRI allows the examination of neuronal pathways in vivo. In contrast to diffusion tensor imaging (DTI) high angular resolution diffusion imaging (HARDI) [5,6] is able to reconstruct more than one fiber population within a voxel. HARDI-based tractography approaches need to identify voxels with multiple diffusion directions. In addition, fiber integrity information is vital in neuro-app...
متن کاملCorrection of eddy current distortions in high angular resolution diffusion imaging.
PURPOSE To correct distortions caused by eddy currents induced by large diffusion gradients during high angular resolution diffusion imaging without any auxiliary reference scans. MATERIALS AND METHODS Image distortion parameters were obtained by image coregistration, performed only between diffusion-weighted images with close diffusion gradient orientations. A linear model that describes dis...
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ژورنال
عنوان ژورنال: Magnetic Resonance Imaging
سال: 2010
ISSN: 0730-725X
DOI: 10.1016/j.mri.2009.07.004