Concept

Diffusion MRI

Related publications (320)

White Matter Mapping in DT-MRI Using Geometric Flows

Jean-Philippe Thiran, Reto Meuli, Patric Hagmann, Xavier Bresson, Olivier Cuisenaire, Lisa Jonasson

We present a 3D geometric flow designed to evolve in Diffusion Tensor Magnetic Resonance Images(DT-MRI) along fiber tracts by measuring the diffusive similarity between voxels. Therefore we define a front propagation speed that is proportional to the simil ...

EUROCAST2003

Validation of Tissue Modelization and Classification Techniques in T1-Weighted MR Brain Images

Jean-Philippe Thiran, Meritxell Bach Cuadra, Torsten Butz, Bram Platel

We propose a deep study on tissue modelization and classification Techniques on T1-weighted MR images. Three approaches have been taken into account to perform this validation study. Two of them are based on Finite Gaussian Mixture (FGM) model. The first o ...

EUSIPCO2002

Registration and visualization of transcranial magnetic stimulation on magnetic resonance images

Olivier Cuisenaire, Benoît Macq

We propose a method for the registration of MRI brain images with the physical space. Points on the patients scalp are acquired using a magnetic-field digitizer. The registration transform is the rigid transform that minimizes the mean square distance bet ...

IEEE2001

Extracellular-intracellular distribution of glucose and lactate in the rat brain assessed noninvasively by diffusion-weighted 1H nuclear magnetic resonance spectroscopy in vivo

Rolf Gruetter

To determine the distribution of cerebral glucose and lactate between the intracellular and the extracellular space of the rat brain in vivo, the diffusion characteristic of glucose and lactate was compared with that of metabolites known to be mainly intra ...

2000

MRI, (1)H-MRS, and functional MRI during and after prolonged nonconvulsive seizure activity

Olaf Blanke

Various structural and functional changes, such as focal edema, blood flow, and metabolism, occur in the cerebral cortex after focal status epilepticus. These changes can be assessed noninvasively by means of MRI techniques, such as fluid-attenuated invers ...

American Academy of Neurology2000

Water diffusion in rat brain in vivo as detected at very large b values is multicompartmental

Rolf Gruetter

The diffusion-weighted signal attenuation of water in rat brain was measured with pulsed-field gradient nuclear magnetic resonance methods in a single voxel under in vivo and global ischemic conditions. The diffusion- attenuated water signal was observed i ...

1999

Rapid induction of functional and morphological continuity between severed ends of mammalian or earthworm myelinated axons

Jeffrey Alan Hubbell

The inability to rapidly restore the loss of function that results from severance (cutting or crushing) of PNS and CNS axons is a severe clinical problem. As a novel strategy to help alleviate this problem, we have developed in vitro procedures using Ca2+- ...

1999

Band-to-band recombination in N+ InP substrate: Evidence of photon recycling

Jean-Daniel Ganière

Quantitative nondispersive cathodoluminescence (CL) measurements and dispersive CL experiments are performed at room temperature on n(+)-InP substrates as a function of the accelerating voltage (Eo). The results are explained in terms of band-to-band recom ...

Iop Publishing Ltd1995

Comparison of the Lateral Carrier Transport between a Gaas Single-Quantum-Well and the Algaas Barrier During Cathodoluminescence Excitation

Franz-Karl Reinhart, Jean-Daniel Ganière

In a recent paper we measured the lateral hole diffusion in a GaAs/AlGaAs single quantum well (SQW) by a novel method. At helium temperature, we estimate a lateral hole diffusion length in the QW of 1.5 mum. However, the assumption that diffusion takes pla ...

1994

Structural Brain Network Reorganization and Social Cognition Related to Adverse Perinatal Condition from Infancy to Early Adolescence

Jean-Philippe Thiran, Elda Fischi Gomez

Adverse conditions during fetal life have been associated to both structural and functional changes in neurodevelopment from the neonatal period to adolescence. In this study, connectomics was used to assess the evolution of brain networks from infancy to ...

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