Results 81 to 90 of about 389,778 (240)
Power Euclidean metrics for covariance matrices with application to diffusion tensor imaging [PDF]
arXiv, 2010 Various metrics for comparing diffusion tensors have been recently proposed in the literature. We consider a broad family of metrics which is indexed by a single power parameter. A likelihood-based procedure is developed for choosing the most appropriate metric from the family for a given dataset at hand.
arxiv
Discovering Hidden Physics Behind Transport Dynamics [PDF]
arXiv, 2020 Transport processes are ubiquitous. They are, for example, at the heart of optical flow approaches; or of perfusion imaging, where blood transport is assessed, most commonly by injecting a tracer. An advection-diffusion equation is widely used to describe these transport phenomena.
arxiv
Image Analysis and Stereology, 2011 Water diffusion tensor magnetic resonance imaging (DT-MRI) is a non-invasive and sensitive modality that is becoming increasingly popular in diagnostic radiology. DT-MRI provides in vivo directional information about the organization and microdynamics of
Khader M Hasan +2 more
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Neural Regeneration Research, 2019 Multiple sclerosis is a neurodegenerative and inflammatory disease, a hallmark of which is demyelinating lesions in the white matter. We hypothesized that alterations in white matter microstructures can be non-invasively characterized by advanced ...
Sourajit M Mustafi +6 more
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Characterization of imaging gradients in diffusion tensor imaging [PDF]
Journal of Magnetic Resonance, 2010 For obtaining a complete model the diffusion tensor imaging (DTI) method is derived in a new linear algebraic framework in order to include the effect of all of the magnetic field gradients on the MRI signal. In the framework, the coefficient matrix of the estimation equations consists of the sum of three matrices corresponding to diffusion gradients ...
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Neuropsychiatric Disease and Treatment, 2015 Meng Zhang, Gengfan Ye, Lin Deng, Shuo Xu, Yunyan Wang Department of Neurosurgery, Qi Lu Hospital, Shandong University, Jinan, People’s Republic of China Abstract: Hypertrophic olivary degeneration is a transsynaptic form of degeneration, which ...
Zhang M, Ye G, Deng L, Xu S, Wang Y
doaj
Anisotropic Diffusion in ITK [PDF]
arXiv, 2015 Anisotropic Non-Linear Diffusion is a powerful image processing technique, which allows to simultaneously remove the noise and enhance sharp features in two or three dimensional images. Anisotropic Diffusion is understood here in the sense of Weickert, meaning that diffusion tensors are anisotropic and reflect the local orientation of image features ...
arxiv
Diffusion tensor mapping of the human brain using single-shot line scan imaging [PDF]
, 2000 J�rgen Finsterbusch, Jens Frahm
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Tensor-valued diffusion magnetic resonance imaging in a radiotherapy setting
Physics and Imaging in Radiation Oncology, 2022 Background and purpose: Diagnostic information about cell density variations and microscopic tissue anisotropy can be gained from tensor-valued diffusion magnetic resonance imaging (MRI).
Patrik Brynolfsson +6 more
doaj
Loss of connectivity in Alzheimer's disease: an evaluation of white matter tract integrity with colour coded MR diffusion tensor imaging [PDF]
, 2000 Sarah Rose
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