Eva Alonso‐Ortiz

A Realistic In Silico Brain Phantom for Quantifying Susceptibility Anisotropy‐Induced Error in Susceptibility Separation

Daniel Ridani, Benjamin De Leener, Eva Alonso‐Ortiz

ABSTRACT Purpose To create a realistic in silico brain phantom for positive and negative magnetic susceptibility that incorporates susceptibility anisotropy, enabling the evaluation of how susceptibility anisotropy influences susceptibility separation algorithm performance. Methods We expanded an existing QSM validation phantom by creating …

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Tensor Decomposition‐Based Multi‐Signal Matrix Pencil Method for Myelin Water Fraction Estimation

Deepu Kurian, Eva Alonso‐Ortiz, Faheem Arshad, Joseph Suresh Paul

PURPOSE: To develop a robust method for estimating myelin water fraction (MWF) from multi-echo gradient-recalled echo (mGRE) data under acquisition regimes that limit echo-train length and support higher spatial sampling. METHODS: A tensor decomposition-based multi-signal matrix pencil (T-MP) framework is proposed to …

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Ultra-high field cervical spinal cord quantitative MRI: A 7T multi-center study of traveling spines

Virginie Callot, Mohammed Bennasser, Samira Mchinda, Daniel S. Papp et autres

Motivation: A reliable standardized 7T qMRI protocol for cervical spinal cord (c-SC) is essential for enabling consistent data collection across multiple centers and maximizing the impact of collaborative studies. Goal(s): To provide reliable multiparametric MRI (qT1,T2*-CSA,DTI) sensitive to microstructural SC tissue for …

Multi-center benchmarking of cervical spinal cord RF coils at 7T: A traveling spines study

Eva Alonso‐Ortiz, Daniel S. Papp, Robert Barry, Kyota Poëti et autres

Motivation: The small diameter, long length, and varying tissue surrounding the spinal cord (SC) impose specific considerations when designing radio-frequency (RF) coils. The optimal coil configuration for 7T SC MRI is unknown and, currently, there are few coil options. Goal(s): To develop …

Anatomy-Based Simulations of B0 Field Maps: A Large Database for Head and Spine Shim Coil Development

Mathieu Boudreau, Charles Pageot, Nathan Molinier, Nilser Laines-Medina et autres

Motivation: B0 field inhomogeneity, particularly near airways and in the spine, degrades MRI quality. While conventional shimming addresses some of these challenges, a resource of B0 maps with diverse anatomies would further support tailored shim coil design. Goal(s): To develop an open-access …

Representation in Brain Imaging Research: A Quebec Demographic Overview

Olujide Oyeniran, Tudor Sintu, Udunna Anazodo, Benjamin De Leener et autres

Neuroimaging research must reflect the diversity of the populations it aims to serve. This scoping review examines the demographic characteristics (age, sex, race and ethnicity, and geographic representation) of participants in brain MRI and positron-emission tomography studies conducted in Quebec, Canada, between …

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Representation in Brain Imaging Research: A Quebec demographic overview

Tudor Sintu, Olujide Oyeniran, Udunna Anazodo, Benjamin De Leener et autres

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Multi‐center benchmarking of cervical spinal cord RF coils for 7 T MRI : A traveling spines study

Eva Alonso‐Ortiz, Daniel S. Papp, Robert Barry, Kyota Poëti et autres

PURPOSE: The depth within the body, small diameter, long length, and varying tissue surrounding the spinal cord impose specific considerations when designing RF coils. The optimal coil configuration for 7 T cervical spinal cord MRI is unknown and currently there are very …

ca, us, de, gb, no, ch, fr (code pays fourni par la source)

Multi-center benchmarking of cervical spinal cord RF coils for 7 T MRI: A traveling spines study

Eva Alonso‐Ortiz, Daniel S. Papp, Robert Barry, Kyota Poëti et autres

Purpose: The depth within the body, small diameter, long length, and varying tissue surrounding the spinal cord impose specific considerations when designing radiofrequency coils. The optimal coil configuration for 7 T cervical spinal cord MRI is unknown and, currently, there are very …

ca, us, de, gb, no, ch, fr (code pays fourni par la source)

Body size and intracranial volume interact with the structure of the central nervous system: A multi-center in vivo neuroimaging study

René Labounek, Monica T. Bondy, Amy Paulson, Sandrine Bédard et autres

Clinical research emphasizes the implementation of rigorous and reproducible study designs that rely on between-group matching or controlling for sources of biological variation such as subject's sex and age. However, corrections for body size (i.e., height and weight) are mostly lacking in …

us, ca, ch, au, gb, de, fr, cz, it, jp, es, cn, pl (code pays fourni par la source)

Whole-Body Phantom with high-resolution Spinal Cord

Q. Sebastian A. Rios, Eva Alonso‐Ortiz

Customized segmentation of a high-resolution CT phantom that includes realistic anatomy and surroundings of the spinal cord along the spine.

Longitudinal reproducibility of brain and spinal cord quantitative MRI biomarkers

Mathieu Boudreau, Agâh Karakuzu, Arnaud Boré, Basile Pinsard et autres

Abstract Quantitative MRI (qMRI) promises better specificity, accuracy, repeatability, and reproducibility relative to its clinically-used qualitative MRI counterpart. Longitudinal reproducibility is particularly important in qMRI. The goal is to reliably quantify tissue properties that may be assessed in longitudinal clinical studies throughout …

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