Search Results for author: Demian Wassermann

Found 12 papers, 0 papers with code

PAVI: Plate-Amortized Variational Inference

no code implementations30 Aug 2023 Louis Rouillard, Alexandre Le Bris, Thomas Moreau, Demian Wassermann

Given observed data and a probabilistic generative model, Bayesian inference searches for the distribution of the model's parameters that could have yielded the data.

Bayesian Inference Variational Inference

PAVI: Plate-Amortized Variational Inference

no code implementations10 Jun 2022 Louis Rouillard, Thomas Moreau, Demian Wassermann

Given some observed data and a probabilistic generative model, Bayesian inference aims at obtaining the distribution of a model's latent parameters that could have yielded the data.

Bayesian Inference Variational Inference

Scalable Query Answering under Uncertainty to Neuroscientific Ontological Knowledge: The NeuroLang Approach

no code implementations23 Feb 2022 Gaston Zanitti, Yamil Soto, Valentin Iovene, Maria Vanina Martinez, Ricardo Rodriguez, Gerardo Simari, Demian Wassermann

Researchers in neuroscience have a growing number of datasets available to study the brain, which is made possible by recent technological advances.

Inverting brain grey matter models with likelihood-free inference: a tool for trustable cytoarchitecture measurements

no code implementations15 Nov 2021 Maëliss Jallais, Pedro Luiz Coelho Rodrigues, Alexandre Gramfort, Demian Wassermann

Solving the problem of relating the dMRI signal with cytoarchitectural characteristics calls for the definition of a mathematical model that describes brain tissue via a handful of physiologically-relevant parameters and an algorithm for inverting the model.

Inferring the Localization of White-Matter Tracts using Diffusion Driven Label Fusion

no code implementations4 Oct 2021 Guillermo Gallardo, Gaston Zanitti, Mat Higger, Sylvain Bouix, Demian Wassermann

Inferring which pathways are affected by a brain lesion is key for both pre and post-treatment planning.

ADAVI: Automatic Dual Amortized Variational Inference Applied To Pyramidal Bayesian Models

no code implementations ICLR 2022 Louis Rouillard, Demian Wassermann

Frequently, population studies feature pyramidally-organized data represented using Hierarchical Bayesian Models (HBM) enriched with plates.

Density Estimation Variational Inference

Complex Coordinate-Based Meta-Analysis with Probabilistic Programming

no code implementations2 Dec 2020 Valentin Iovene, Gaston Zanitti, Demian Wassermann

We demonstrate results for two-term conjunctive queries, both on simulated meta-analysis databases and on the widely-used Neurosynth database.

Probabilistic Programming

PEP: Parameter Ensembling by Perturbation

no code implementations NeurIPS 2020 Alireza Mehrtash, Purang Abolmaesumi, Polina Golland, Tina Kapur, Demian Wassermann, William M. Wells III

In most experiments, PEP provides a small improvement in performance, and, in some cases, a substantial improvement in empirical calibration.

Fine-grain atlases of functional modes for fMRI analysis

no code implementations5 Mar 2020 Kamalaker Dadi, Gaël Varoquaux, Antonia Machlouzarides-Shalit, Krzysztof J. Gorgolewski, Demian Wassermann, Bertrand Thirion, Arthur Mensch

We demonstrate the benefits of extracting reduced signals on our fine-grain atlases for many classic functional data analysis pipelines: stimuli decoding from 12, 334 brain responses, standard GLM analysis of fMRI across sessions and individuals, extraction of resting-state functional-connectomes biomarkers for 2, 500 individuals, data compression and meta-analysis over more than 15, 000 statistical maps.

Data Compression

Text to brain: predicting the spatial distribution of neuroimaging observations from text reports

no code implementations4 Jun 2018 Jérôme Dockès, Demian Wassermann, Russell Poldrack, Fabian Suchanek, Bertrand Thirion, Gaël Varoquaux

In this paper, we propose to mine brain medical publications to learn the spatial distribution associated with anatomical terms.

Probabilistic Diffeomorphic Registration: Representing Uncertainty

no code implementations12 Jan 2017 Demian Wassermann, Matt Toews, Marc Niethammer, William Wells III

The Bayesian posterior distribution over the deformations aligning a moving and a fixed image is approximated via a variational formulation.

Image Registration

Deformable Registration of Feature-Endowed Point Sets Based on Tensor Fields

no code implementations CVPR 2014 Demian Wassermann, James Ross, George Washko, William M. Wells III, Raul San Jose-Estepar

Our framework relies on a dense tensor field representation which we implement sparsely as a kernel mixture of tensor fields.

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