نتایج جستجو برای: spherical deconvolution
تعداد نتایج: 54852 فیلتر نتایج به سال:
Introduction: It has been shown [1] that one third of voxels in a brain volume include more than one orientation of fibre bundles. To better consider this condition, recently, HARDI methods such as q-ball, DSI, PASMRI, Spherical Deconvolution methods [2, 3, 4, 5, 6], have been proposed. These solutions have demonstrated to be more accurate to describe white matter in regions with complex tissue...
Spherical deconvolution (SD) methods are widely used to estimate the intra-voxel white-matter fiber orientations from diffusion MRI data. However, while some of these methods assume a zero-mean Gaussian distribution for the underlying noise, its real distribution is known to be non-Gaussian and to depend on many factors such as the number of coils and the methodology used to combine multichanne...
BACKGROUND A number of imaging factors can affect the orientation distribution function (ODF) reconstruction in high angular resolution diffusion imaging (HARDI). The aim of this study was to investigate the effect of the b-value on the HARDI reconstruction and to seek for the appropriate b-value for ODF reconstruction from clinical HARDI data. METHODS Diffusion MRI data with various b-values...
There is accumulating evidence that at current acquisition resolutions for diffusion-weighted (DW) MRI, the vast majority of white matter voxels contains "crossing fibers", referring to complex fiber configurations in which multiple and distinctly differently oriented fiber populations exist. Spherical deconvolution based techniques are appealing to characterize this DW intra-voxel signal heter...
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