Diffusion Tensor MRI (DT-MRI) is a relatively new imaging technique that measures anisotropic diffusion of molecules in biological tissue [1, 2]. This diffusion anisotropy reflects the presence of spatially oriented structures and therefore allows to study in vivo and non-invasively the architecture of axonal fibers in the central nervous system. Several methods have been developed to reconstru...

Diffusion tensor magnetic resonance imaging (DT-MRI) is becoming a prospective imaging technique in clinical applications because of its potential for in vivo and non-invasive characterization of tissue organization. However, the acquisition of diffusion-weighted images (DWIs) is often corrupted by noise and artifacts, and the intensity of diffusion-weighted signals is weaker than that of class...

Diffusion-tensor MRI (DT-MRI) yields information about the magnitude, anisotropy, and orientation of water diffusion of brain tissues. Although white matter tractography and eigenvector color maps provide visually appealing displays of white matter tract organization, they do not easily lend themselves to quantitative and statistical analysis. In this study, a set of visual and quantitative too...

In Multiple Sclerosis (MS) patients, conventional magnetic resonance imaging (MRI) shows a pattern of white matter (WM) disruption but may also overlook some WM damage. Diffusion tensor MRI (DT-MRI) can provide important in-vivo information about fiber direction that is not provided by conventional MRI. The geometry of diffusion tensors can quantitatively characterize the local structure in tis...

Introduction Diffusion weighted images (DWIs) used for Diffusion Tensor (DT) calculation are commonly acquired with Echo-planar imaging (EPI). Unfortunately, EPI is very sensitive to magnetic field (B0 ) inhomogeneities, which result in local geometric distortions in regions close to air-tissue interfaces. These distortions degrade the anatomical accuracy of DT-MRI maps and potentially increase...

DT-MRI fields measure the self-diffusion of water in biological tissue and, hence, tensors from these fields must be symmetric positive definite (PSD). However, due to a number of reasons this is not true for real data. Furthermore, it would be desirable to maintain that condition when tensor data are filtered. In this paper, we propose a homomorphic processing cascade that guarantees PSD tenso...

Background Diffusion tensor magnetic resonance imaging (DT-MRI) enables 3D evaluation of whole heart microstructure. DT invariants evaluate microstructural remodeling by quantifying trace (increases with decreasing cellularity), fractional anisotropy (FA, decreases with increasing fibrosis), and tissue mode (decreases with increasing fiber disarray) [1]. We have shown that DT invariant data ide...

The current study combined structural magnetic resonance imaging (sMRI) and diffusion tensor MRI (DT-MRI) to investigate both gray matter density (GMD) and white matter integrity (WMI) in 18 pianists and 21 age-matched non-musicians. The pianists began their piano training at a mean age of 12. Voxel-based morphometry of the sMRI data showed that the pianists had higher GMD in the left primary s...

Diffusion-tensor magnetic resonance imaging (DT-MRI) allows of most brain pathways, quantifying their integrity and even suggesting a leading mechanism damage (demyelination or ischemia). However, it is difficult to use this technique without good knowledge the anatomy. This article provides an overview literature on structure function main pathways.

Introduction Conventional magnetic resonance imaging (MRI) is the best imaging modality to demonstrate ligamentous injury, hematoma, disk herniation, spinal cord edema and hemorrhage that occur following trauma. Quantitative and qualitative image parameters like lesion length, maximum spinal cord compression, spinal cord swelling and, presence of hemorrhage within the cord has been reported to ...