INTRODUCTION: Many recent techniques have been introduced for high angular resolution diffusion imaging (HARDI) [1 and references therein], to infer the diffusion or fiber orientation distribution function (ODF) of the underlying tissue structure. These methods, mostly designed for fiber tractography, are normally based on a single shell acquisition and can only recover some angular information...

In this work, we propose an original and efficient approach to exploit the ability of Compressed Sensing (CS) to recover diffusion MRI (dMRI) signals from a limited number of samples while efficiently recovering important diffusion features such as the ensemble average propagator (EAP) and the orientation distribution function (ODF). Some attempts to sparsely represent the diffusion signal have...

The tongue consists of a complex, multiscale array of myofibers that comprise the anatomical underpinning of lingual mechanical function. 3-D myoarchitecture was imaged in mouse tongues with diffusion spectrum magnetic resonance imaging (DSI) at 9.4 T (b(max) 7000 smm, 150-microm isotropic voxels), a method that derives the preferential diffusion of water/voxel, and high-throughput (10 fps) two...

Effects of electroshock treatment (EST) on the microstructural evolution and mechanical properties near-β titanium alloy (Ti-55531) formed by directed energy deposition (DED) was studied in this work. With increase EST time, average hardness specimen decreased from 426 HV to 316 HV, fracture strain increased significantly, which attributed uniform dispersion α phase along grain boundaries insid...

The r-value of a sheet metal is a measure of plastic anisotropy frequently used for prediction of performance in deep-drawing. It has also gured prominently in the literature for validation of theories where the predicted angular dependence of r is compared with the measured dependence. As plastic anisotropy in sheet metals is caused mainly by the preferred orientations of grains within the pol...

Cold rolled sheet metal often used in laser forming exhibits anisotropic properties, which are mostly caused by preferred orientations of grains developed during the severe plastic deformation. In present study, the textures of cold-rolled mild steel sheets are characterized and the influence of the plastic anisotropy on laser forming process is investigated. Deformation textures are measured i...

Diffusion tensor imaging allows for the non-invasive in vivo mapping of the brain tractography. However, fiber bundles have complex structures such as fiber crossings, fiber branchings and fibers with large curvatures that tensor imaging (DTI) cannot accurately handle. This study presents a novel brain white matter tractography method using Q-ball imaging as the data source instead of DTI, beca...

Based on the principle of maximum entropy method (MEM) for quantitative texture analysis, the differential evolution (DE) algorithm was effectively introduced. Using a DE-optimized algorithm with a faster but more stable convergence rate of iteration, more reliable complete orientation distribution functions (C-ODF) have been obtained for deep-drawn IF steel sheets and the recrystallized alumin...

Introduction In recent years, data-driven analysis of diffusion-weighted imaging (DWI) has been extended beyond white matter (WM), explicitly modelling partial voluming with adjacent tissues. Supervised methods such as singleand multi-tissue constrained spherical deconvolution (CSD) reconstruct orientation distribution functions (ODF) of WM, grey matter (GM), and cerebrospinal fluid (CSF), give...

Electromigration, as one of the main failure mechanismus of VLSI circuits, is of great concern to microelectronics industry. The effects of grain morphology as well as texture can be studied on a mesoscale by Automated Crystal Orientation Mapping (ACOM) in the SEM since it provides a detailed description of the microstructure. Textural functions (e.g. pole figures, ODF, MODF), statistical param...