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Alessandro Daducci

Cette personne n’est plus à l’EPFL

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Publications associées (82)

A convex optimization framework for global tractography

Jean-Philippe Thiran, Alia Lemkaddem, Alessandro Daducci

In this article we present a novel approach for diffusion MRI global tractography. Our formulation models the signal in each voxel as a linear combination of fiber-tract basis func- tions, which consist of a comprehensive set of plausible fiber tracts that ...

2013

3D Residual Eddy Current Field Characterisation: applied to Diffusion Weighted Magnetic Resonance Imaging

François Lazeyras, Rolf Gruetter, Gunnar Krüger, Alessandro Daducci, Kieran O'Brien

Clinical use of the Stejskal-Tanner diffusion weighted images is hampered by the geometric distortions that result from the large residual 3D eddy current field induced. In this work we aimed to predict, using linear response theory, the residual 3D eddy c ...

Institute of Electrical and Electronics Engineers2013

Micro-Structural Brain Alterations in Aviremic HIV+ Patients with Minor Neurocognitive Disorders: A Multi-Contrast Study at High Field

Djalel Eddine Meskaldji, Reto Meuli, François Lazeyras, Gunnar Krüger, Tobias Kober, Cristina Granziera, Alessandro Daducci, Alexis Roche

Objective Mild neurocognitive disorders (MND) affect a subset of HIV+ patients under effective combination antiretroviral therapy (cART). In this study, we used an innovative multi-contrast magnetic resonance imaging (MRI) approach at high-field to assess ...

Public Library of Science2013

Migraineurs without aura show microstructural abnormalities in the cerebellum and frontal lobe

Nouchine Hadjikhani, David Paul Roger Romascano, Gunnar Krüger, Cristina Granziera, Alessandro Daducci, Alexis Roche

The involvement of the cerebellum in migraine pathophysiology is not well understood. We used a biparametric approach at high-field MRI (3 T) to assess the structural integrity of the cerebellum in 15 migraineurs with aura (MWA), 23 migraineurs without aur ...

Springer US2013

A new early and automated MRI-based predictor of motor improvement after stroke

Jean-Philippe Thiran, Djalel Eddine Meskaldji, Reto Meuli, Nouchine Hadjikhani, Gunnar Krüger, Cristina Granziera, Alessandro Daducci, Alexis Roche, Richard Frackowiak

Objectives: In this study, we investigated the structural plasticity of the contralesional motor network in ischemic stroke patients using diffusion magnetic resonance imaging (MRI) and explored a model that combines a MRI-based metric of contralesional ne ...

2012

Microstructural alterations in the brain of well treated HIV+ patients with minor neurocognitive disorders: a multi-contrast study at high field

Djalel Eddine Meskaldji, Gunnar Krüger, Cristina Granziera, Alessandro Daducci, Alexis Roche

2012

Structural abnormalities in the thalamus of migraine patients: a multi-parametric study at high field

Nouchine Hadjikhani, David Paul Roger Romascano, Gunnar Krüger, Cristina Granziera, Alessandro Daducci, Alexis Roche

2012

Microstructural alterations in the brain of well treated HIV+ patients with minor neurocognitive disorders: a multi-contrast MRI study at 3T

Djalel Eddine Meskaldji, Gunnar Krüger, Cristina Granziera, Alessandro Daducci, Alexis Roche

2012

Altered structural connectivity in patients with medial temporal lobe epilepsy: A Diffusion Spectrum Imaging and Graph Analysis study

Jean-Philippe Thiran, Alia Lemkaddem, Alessandra Griffa, Alessandro Daducci

In this study we investigated the effect of medial temporal lobe epilepsy (MTLE) on the global characteristics of brain connectivity estimated by topological measures. We used DSI (Diffusion Spectrum Imaging) to construct a connectivity matrix where the no ...

2012

Whole-brain structural connectivity in temporal lobe epilepsy: a Diffusion Spectrum Imaging study

Jean-Philippe Thiran, François Lazeyras, Alia Lemkaddem, Alessandra Griffa, Alessandro Daducci

Introduction: Medial Temporal Lobe Epilepsy (mTLE) with hippocampal sclerosis is the most frequent cause of drug-resistant focal epilepsy in adults. These patients suffer from widespread subtle white matter abnormalities and abnormal functional connectivit ...

2012

A multi-center study: Intra-scan and inter-scan variability of Diffusion Spectrum Imaging

Jean-Philippe Thiran, François Lazeyras, Alia Lemkaddem, Gunnar Krüger, Alessandro Daducci, Kieran O'Brien

The objective of this study was to investigate whether it is possible to pool together diffusion spectrum imaging data from four different scanners, located at three different sites. Two of the scanners had identical configuration whereas two did not. To m ...

Elsevier2012

The Connectome Mapper: an open-source processing pipeline to map connectomes with MRI

Jean-Philippe Thiran, Xavier Gigandet, Patric Hagmann, Reto Meuli, Alia Lemkaddem, Alessandra Griffa, Alessandro Daducci, Leila Cammoun

Researchers working in the field of global connectivity analysis using diffusion magnetic resonance imaging (MRI) can count on a wide selection of software packages for processing their data, with methods ranging from the reconstruction of the local intra- ...

Public Library of Science2012

Graph theory to analyse developmental plasticity in connectivity of preterm children

Jean-Philippe Thiran, François Lazeyras, Alessandra Griffa, Elda Fischi Gomez, Alessandro Daducci

2012

Brain tissue segmentation on diffusion weighted magnetic resonance data

Jean-Philippe Thiran, Meritxell Bach Cuadra, Subrahmanyam Venkata Ravi Mohana Sai Gorthi, Alessandro Daducci, Oscar Esteban-Sanz

2012

The Connectome Viewer Toolkit: an open source framework to manage, analyze, and visualize connectomes

Jean-Philippe Thiran, Patric Hagmann, Reto Meuli, Alia Lemkaddem, Alessandro Daducci

Advanced neuroinformatics tools are required for methods of connectome mapping, analysis, and visualization. The inherent multi-modality of connectome datasets poses new challenges for data organization, integration, and sharing. We have designed and imple ...

Frontiers Research Foundation2011

Testing the variability of Diffusion Spectrum Imaging (DSI): Inter- and intra-site comparison on "identical" 3T scanners

Jean-Philippe Thiran, Reto Meuli, François Lazeyras, Alia Lemkaddem, Gunnar Krüger, Alessandro Daducci

Multi-center neuroimaging studies have more power than smaller ones to conduct sophisticated studies of basic neuroanatomy and clinical disorders. One important confound of combining images obtained from different scanners is the potential for scanner effe ...

2011

Towards a diffusion image processing validation and accuracy prediction framework

Gloria Menegaz, Jean-Philippe Thiran, Meritxell Bach Cuadra, Alia Lemkaddem, Cristina Granziera, Alessandro Daducci

Validation is the main bottleneck preventing the adoption of many medical image processing algorithms in the clinical practice. In the classical approach, a-posteriori analysis is performed based on some objective metrics. In this work, a different approac ...

2011

Diffusion Spectrum Imaging after stroke shows structural changes in the contra-lateral motor network correlating with functional recovery

Jean-Philippe Thiran, Djalel Eddine Meskaldji, Xavier Gigandet, Reto Meuli, Gunnar Krüger, Cristina Granziera, Alessandro Daducci, Leila Cammoun

There is growing interest in understanding the role of the non-injured contra-lateral hemisphere in stroke recovery. In the experimental field, histological evidence has been reported that structural changes occur in the contra-lateral connectivity and cir ...

2011

Harmonic analysis of spherical sampling in diffusion MRI

Jean-Philippe Thiran, Dimitri Nestor Alice Van De Ville, Yves Wiaux, Alessandro Daducci, Jason Douglas McEwen

In the last decade diffusion MRI has become a powerful tool to non-invasively study white-matter integrity in the brain. Recently many research groups have focused their attention on multi-shell spherical acquisitions with the aim of effectively mapping th ...

2011

On the reproducibility and anatomical correspondence of DSI tractography

Jean-Philippe Thiran, Xavier Gigandet, Patric Hagmann, Reto Meuli, Gunnar Krüger, Cristina Granziera, Alessandro Daducci, Leila Cammoun

Diffusion spectrum imaging (DSI) is increasingly explored in clinical research. The quantitative value of the DSI technique, however, has still to be established. In this context, a better understanding of the reproducibility and the anatomical corresponde ...

2010

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