Catarina Domingos

Low-Cost Raman Spectroscopy Setup Combined with a Machine Learning Model

Catarina Domingos, Alessandro Fantoni, M. Fernandes, Jorge Fidalgo et autres

The diagnosis of kidney diseases presents significant challenges, including the reliance on variable and unstable biomarkers and the necessity for complex and expensive laboratory tests. Raman spectroscopy emerges as a promising technique for analyzing complex fluids, like urine, and detecting important disease …

pt (code pays fourni par la source)

Cerebrovascular reactivity mapping using breath-hold BOLD-fMRI: Comparison of signal models combined with voxelwise lag optimization

Catarina Domingos, Inês Esteves, Ana R. Fouto, Amparo Ruiz‐Tagle et autres

Abstract Cerebrovascular reactivity (CVR) can be mapped noninvasively using blood oxygenation level dependent (BOLD) fMRI during a breath-hold (BH) task. Previous studies showed that the BH BOLD response is best modeled as the convolution of the partial pressure of end-tidal CO2 (PetCO2) …

pt, es (code pays fourni par la source)

Cerebrovascular reactivity mapping using breath-hold BOLD-fMRI: comparison of signal models when using voxelwise lag optimization

Catarina Domingos, Inês Esteves, Ana R. Fouto, Amparo Ruiz‐Tagle et autres

We investigate the best modeling approach for mapping cerebrovascular reactivity (CVR) using voxelwise lag optimization. We considered two types of regressors (Block, PetCO2), three convolution models (no convolution, single gamma, double gamma), and a variable haemodynamic delay. We found that the CVR …

Cerebrovascular reactivity mapping using breath-hold BOLD-fMRI: comparison of signal models combined with voxelwise lag optimization

Catarina Domingos, Inês Esteves, Ana R. Fouto, Amparo Ruiz‐Tagle et autres

ABSTRACT Cerebrovascular reactivity (CVR) can be mapped noninvasively using blood oxygenation level dependent (BOLD) fMRI during a breath-hold (BH) task. Previous studies showed that the BH BOLD response is best modeled as the convolution of the partial pressure of end-tidal CO2 (PetCO2) …

pt (code pays fourni par la source)

Reproducibility of arterial spin labeling cerebral blood flow image processing: A report of the ISMRM open science initiative for perfusion imaging (OSIPI) and the ASL MRI challenge

André Monteiro Paschoal, Joseph G. Woods, Joana Pinto, Esther E. Bron et autres

PURPOSE: Arterial spin labeling (ASL) is a widely used contrast-free MRI method for assessing cerebral blood flow (CBF). Despite the generally adopted ASL acquisition guidelines, there is still wide variability in ASL analysis. We explored this variability through the ISMRM-OSIPI ASL-MRI Challenge, …

br, us, gb, nl, de, pt, ca (code pays fourni par la source)

Neuronal modulation in cerebrovascular reactivity measurements using a breath-hold task: a simultaneous EEG-fMRI study

Inês Esteves, Beatriz Raposo, Marta Xavier, Ana R. Fouto et autres

fMRI can be used to assess cerebrovascular reactivity by measuring BOLD changes during a breath hold task. This is assumed to be isometabolic so that BOLD changes cannot be attributed to neuronal activity. We performed simultaneous EEG-fMRI recordings during a breath-hold task …

Impact of susceptibility-induced distortion correction on perfusion imaging by pCASL with a segmented 3D GRASE readout

Catarina Domingos, Ana R. Fouto, Rita G. Nunes, Amparo Ruiz‐Tagle et autres

PURPOSE: The consensus for the clinical implementation of arterial spin labeling (ASL) perfusion imaging recommends a segmented 3D Gradient and Spin-Echo (GRASE) readout for optimal signal-to-noise-ratio (SNR). The correction of the associated susceptibility-induced geometric distortions has been shown to improve diagnostic precision, …

pt (code pays fourni par la source)