Introduction Using Diffusion Tensor Imaging (DTI) sequence provided by magnetic resonance imaging system, the diffusion properties of water can be quantified by measuring the diffusion anisotropy within each voxel [1]. Thus, one is able to track axons in white matter since their diffusivity is significantly higher than that of the rest of the tissue. The aim of this work is to use DTI to assess...

Acknowledgements. This paper summarises the results of updating and extending a previous study of Britain's relative productivity performance. Funding for this work was provided jointly by the Department of Trade and Industry, HM-Treasury and The Office for National Statistics, to whom we owe thanks. The research benefited from frequent meetings and detailed comments from representatives of the...

In the processing and analysis of diffusion tensor imaging (DTI) data, certain predefined morphological features of diffusion tensors are often represented as simplified scalar indices, termed diffusion anisotropy indices (DAIs). When comparing tensor morphologies across differing voxels of an image, or across corresponding voxels in different images, DAIs are mathematically and statistically m...

OBJECTIVE To provide an overview of diffusion tensor imaging (DTI) and its application to the study of white matter in the developing brain in both healthy and clinical samples. METHOD The development of DTI and its application to brain imaging of white matter tracts is discussed. Forty-eight studies using DTI to examine diffusion properties of the developing brain are reviewed in the context...

Quantitative-diffusion-tensor MRI consists of deriving and displaying parameters that resemble histological or physiological stains, i.e., that characterize intrinsic features of tissue microstructure and microdynamics. Specifically, these parameters are objective, and insensitive to the choice of laboratory coordinate system. Here, these two properties are used to derive intravoxel measures of...

BACKGROUND Diffusion imaging tractography is increasingly used to trace critical fiber tracts in brain tumor patients to reduce the risk of post-operative neurological deficit. However, the effects of peritumoral edema pose a challenge to conventional tractography using the standard diffusion tensor model. The aim of this study was to present a novel technique using a two-tensor unscented Kalma...

BACKGROUND AND PURPOSE The increase in fractional anisotropy (FA) in acute stroke has yet to be explained. Using an engineering methodology known as pq diagrams, we sought to explain the increase in FA by describing changes in the total magnitude of the diffusion tensor (L) as well as the isotropic (p) and anisotropic (q) components. METHODS Diffusion tensor imaging was performed in 10 patien...

As diffusion tensor imaging gains widespread use, many researchers have been motivated to go beyond the tensor model and fit more complex diffusion models, to gain a more complete description of white matter microstructure and associated pathology. Two such models are diffusion kurtosis imaging (DKI) and diffusion basis spectrum imaging (DBSI). It is not clear which DKI parameters are most clos...