This paper deals with the finite element solution of the convection diffusion equation in one and two dimensions. Two main techniques are adopted and compared. The first one includes Petrov-Galerkin based on Lagrangian tensor product elements in conjunction with streamlined upwinding. The second approach represents Bubnov/Petrov-Galerkin schemes based on a new group of exponential elements. It ...

Diffusion tensor imaging (DTI) is a quantitative magnetic resonance imaging (MRI) method that is used to study the microstructural properties of white matter in the brain. Tensor-derived quantities, such as the trace and fractional anisotropy (FA), are important for characterizing the normal, diseased, and developing brain. Consequently, determining the statistical properties of the diffusion t...

While mouse brain development has been extensively studied using histology, quantitative characterization of morphological changes is still a challenging task. This paper presents how developing brain structures can be quantitatively characterized with magnetic resonance diffusion tensor microimaging coupled with techniques of computational anatomy. High resolution diffusion tensor images of ex...

Two- and three-dimensional (3D) white matter atlases were created on the basis of high-spatial-resolution diffusion tensor magnetic resonance (MR) imaging and 3D tract reconstruction. The 3D trajectories of 17 prominent white matter tracts could be reconstructed and depicted. Tracts were superimposed on coregistered anatomic MR images to parcel the white matter. These parcellation maps were the...

Introduction: Functional MRI (fMRI) and diffusion tensor imaging (DTI) including diffusion tractography have allowed scientists to make great strides in understanding how the brain functions. However, these techniques have also have made possible advances in the clinical arena, which will be the focus of this presentation. We will address current and emerging applications of fMRI and DTI in the...

PURPOSE Our aim was to determine whether diffusion anisotropy and diffusivity of white matter tracts of the temporal stem in patients with Alzheimer (AD) can be evaluated independently by using diffusion tensor tractography. MATERIALS AND METHODS Subjects included 15 patients with AD (11 women and 4 men; mean age, 74 years) and 15 age-matched control subjects (11 women and 4 men; mean age, 72...