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unknown title

by J. Dubois, L. Hertz-pannier, D G. Dehaene-lambertz, Y. Cointepas, D. Le Bihan A , 2005
"... Assessment of the early organization and maturation of infants’ cerebral white matter fiber bundles: A feasibility study using quantitative diffusion tensor imaging and tractography ..."
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Assessment of the early organization and maturation of infants’ cerebral white matter fiber bundles: A feasibility study using quantitative diffusion tensor imaging and tractography

Asynchrony of the Early Maturation of White Matter Bundles in Healthy Infants: Quantitative Landmarks Revealed Noninvasively by Diffusion

by Tensor Imaging, Denis Le Bihan, Lucie Hertz-pannier, Inserm U Orsay
"... Abstract: Normal cognitive development in infants follows a well-known temporal sequence, which is assumed to be correlated with the structural maturation of underlying functional networks. Postmortem studies and, more recently, structural MR imaging studies have described qualitatively the heteroge ..."
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the heterogeneous spatiotemporal progression of white matter myelination. However, in vivo quantification of the maturation phases of fiber bundles is still lacking. We used noninvasive diffusion tensor MR imaging and tractography in twentythree 1–4-month-old healthy infants to quantify the early maturation

Quantitative Tractography

by J. H. Gilmore, W. Lin, I. Corouge, Y. S. K. Vetsa, J. K. Smith, C. Kang, H. Gu, R. M. Hamer, J. A. Lieberman, G. Gerig
"... BACKGROUND AND PURPOSE: The early postnatal period is perhaps the most dynamic phase of white matter development. We hypothesized that the early postnatal development of the corpus callosum and corticospinal tracts could be studied in unsedated healthy neonates by using novel approaches to diffusion ..."
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BACKGROUND AND PURPOSE: The early postnatal period is perhaps the most dynamic phase of white matter development. We hypothesized that the early postnatal development of the corpus callosum and corticospinal tracts could be studied in unsedated healthy neonates by using novel approaches

Quantitative Analysis of Cerebral White Matter . . .

by Mahnaz Maddah , 2008
"... In this thesis we develop algorithms for quantitative analysis of white matter fiber tracts from diffusion MRI. The presented methods enable us to look at the variation of a diffusion measure along a fiber tract in a single subject or a population, which allows important clinical studies toward unde ..."
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In this thesis we develop algorithms for quantitative analysis of white matter fiber tracts from diffusion MRI. The presented methods enable us to look at the variation of a diffusion measure along a fiber tract in a single subject or a population, which allows important clinical studies toward

Abnormal Diffusion of Cerebral White Matter in Early Blindness

by unknown authors
"... Abstract: Early visual deprivation may lead to both abnormal and plastic changes in the visual and other systems of the brain. Such secondary changes in the gray matter of the early blind have been well studied, but not so well in the cerebral white matter whose subtle changes may be revealed by dif ..."
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by diffusion tensor imag-ing. The first purpose of this study is to explore the possible changed white matter regions of the early blind in whole brain manners, using voxel-based analysis (VBA) and tract-based spatial statistics (TBSS) methods. The second purpose is to investigate the changes of diffusion

Diffusion Tractography and Neuromotor Outcome in Very Preterm Children with White Matter

by Meredith E. Estep, Christopher D. Smyser, Peter J. Anderson, Cynthia M. Ortinau, Michael Wallendorf, Charles S. Katzman, Lex W Doyle, Deanne K. Thompson, Jeffery J. Neil, Terrie E. Inder, Joshua S. Shimony
"... Background—Moderate-severe white matter abnormality (WMA) in the newborn has been shown to produce persistent disruptions in cerebral connectivity, but does not universally result in neurodevelopmental disability in very preterm (VPT) children. The aims of this hypothesis driven study were to apply ..."
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Background—Moderate-severe white matter abnormality (WMA) in the newborn has been shown to produce persistent disruptions in cerebral connectivity, but does not universally result in neurodevelopmental disability in very preterm (VPT) children. The aims of this hypothesis driven study were to apply

Varying Coefficient Models for Modeling Diffusion Tensors Along White Matter Bundles

by Ying Yuan, Hongtu Zhu, J. S. Marron, John H. Gilmore , 2011
"... Abstract. This paper develops a functional data analysis framework to model diffusion tensors along fiber bundles as functional responses with a set of covariates of interest, such as age, diagnostic status and gender. This framework has a wide range of clinical applications including the characteri ..."
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the characterization of normal brain development, the neural bases of neuropsychiatric disorders, and the joint effects of environmental and genetic factors on white matter fiber bundles. A challenging statistical issue is how to appropriately handle diffusion tensors along fiber bundles as functional data in a

Diffusion Tensor Imaging of the

by Andrew L. Alex, Ph. D, Jee Eun Lee, Ph. D, Aaron S. Field, Ph. D, Andrew L. Alex, Ph. D
"... Diffusion tensor imaging (DTI) is a promising method for characterizing microstructural changes or differences with neuropathology and treatment. The diffusion tensor may be used to characterize the magnitude, anisotropy and orientation of the diffusion tensor. This paper reviews the biological mech ..."
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Diffusion tensor imaging (DTI) is a promising method for characterizing microstructural changes or differences with neuropathology and treatment. The diffusion tensor may be used to characterize the magnitude, anisotropy and orientation of the diffusion tensor. This paper reviews the biological

Maturation of thalamic radiations between 34 and 41 weeks3 gestation: a combined voxel-based study and probabilistic tractography with diffusion tensor imaging

by A. Aeby, Y. Liu, X. De Tiège, V. Denolin, P. David, M. Kavec, T. Metens, P. Van Bogaert - A.J.N.R. Am. J. Neuroradiol , 2009
"... BACKGROUND AND PURPOSE: This study aimed to investigate brain maturation along gestational age with diffusion tensor imaging in healthy preterm and term neonates. Therefore, a voxel-based study of fractional anisotropy (FA) and mean diffusivity (Dav) was performed to reveal the brain regions experie ..."
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BACKGROUND AND PURPOSE: This study aimed to investigate brain maturation along gestational age with diffusion tensor imaging in healthy preterm and term neonates. Therefore, a voxel-based study of fractional anisotropy (FA) and mean diffusivity (Dav) was performed to reveal the brain regions

RESEARCH ARTICLE New Insights into the Developing Rabbit Brain Using Diffusion Tensor Tractography and Generalized q-Sampling MRI

by Seong Yong Lim, Yeu-sheng Tyan, Yi-ping Chao, Fang-yu Nien
"... The use of modern neuroimaging methods to characterize the complex anatomy of brain development at different stages reveals an enormous wealth of information in understand-ing this highly ordered process and provides clues to detect neurological and neurobeha-vioral disorders that have their origin ..."
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in early structural and functional cerebral maturation. Non-invasive diffusion tensor magnetic resonance imaging (DTI) is able to distinguish cere-bral microscopic structures, especially in the white matter regions. However, DTI is unable to resolve the complicated neural structure, i.e., the fiber
Results 1 - 10 of 453