Fast diffusion imaging with high angular resolution
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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There is a major effort in medical imaging to develop algorithms to extract information from DTI and HARDI, which provide detailed information on brain integrity and connectivity. As the images have recently advanced to provide extraordinarily high angular resolution and spatial detail, including an entire manifold of information at each point in the 3D images, there has been no readily availab...
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The recent challenge in diffusion imaging is to find acquisition schemes and analysis approaches that can represent non-gaussian diffusion profiles in a clinically feasible measurement time. In this work we investigate the effect of b-value and the number of gradient vector directions on Q-ball imaging and the Diffusion Orientation Transform (DOT) in a structured way using computational simulat...
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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...
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ژورنال
عنوان ژورنال: Magnetic Resonance in Medicine
سال: 2016
ISSN: 0740-3194,1522-2594
DOI: 10.1002/mrm.26163