Aurélien Delphin
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View article: Microvascular and astrocytic responses to repeated magnetic resonance-guided focused ultrasound
Microvascular and astrocytic responses to repeated magnetic resonance-guided focused ultrasound Open
Focused ultrasound (FUS), in combination with microbubbles, enables the transient and localized opening of the blood-brain barrier (BBB) for targeted drug delivery. While this technique has shown promise in preclinical models, the safety a…
View article: Fast MR signal simulations of microvascular and diffusion contributions using histogram‐based approximation and recurrent neural networks
Fast MR signal simulations of microvascular and diffusion contributions using histogram‐based approximation and recurrent neural networks Open
Purpose Accurate MR signal simulation, including microvascular structures and water diffusion, is crucial for MRI techniques like fMRI BOLD modeling and MR vascular Fingerprinting (MRF), which use susceptibility effects on MR signals for t…
View article: “ <scp>MR</scp> Fingerprinting for Imaging Brain Hemodynamics and Oxygenation”
“ <span>MR</span> Fingerprinting for Imaging Brain Hemodynamics and Oxygenation” Open
Over the past decade, several studies have explored the potential of magnetic resonance fingerprinting (MRF) for the quantification of brain hemodynamics, oxygenation, and perfusion. Recent advances in simulation models and reconstruction …
View article: Cluster Globally, Reduce Locally: Scalable Efficient Dictionary Compression for Magnetic Resonance Fingerprinting
Cluster Globally, Reduce Locally: Scalable Efficient Dictionary Compression for Magnetic Resonance Fingerprinting Open
With the rapid advancements in medical data acquisition and production, increasingly richer representations exist to characterize medical information. However, such large-scale data do not usually meet computing resource constraints or alg…
View article: The Road to a Realistic 3D Model for Estimating <i>R</i><sub>2</sub> and <i>R</i><sub>2</sub>* Relaxation Versus Gd‐DTPA Concentration in Whole Blood and Brain Tumor Vasculature
The Road to a Realistic 3D Model for Estimating <i>R</i><sub>2</sub> and <i>R</i><sub>2</sub>* Relaxation Versus Gd‐DTPA Concentration in Whole Blood and Brain Tumor Vasculature Open
Dynamic susceptibility contrast (DSC) MRI is commonly part of brain tumor imaging. For quantitative analysis, measurement of the arterial input function and tissue concentration time curve is required. Usually, a linear relationship betwee…
View article: Contrast-free Blood Volume, Microvascular Properties and Relaxometry mapping using bSSFP MR Fingerprinting
Contrast-free Blood Volume, Microvascular Properties and Relaxometry mapping using bSSFP MR Fingerprinting Open
Motivation: Most MR methods for quantifying microvascular properties involve the injection of exogenous contrast agents (CA). Goal(s): We propose an innovative MRI method that simultaneously maps the deoxygenated cerebral blood volume (CBV…
View article: Relaxometry and contrast-free cerebral microvascular quantification using balanced Steady-State Free Precession MR Fingerprinting
Relaxometry and contrast-free cerebral microvascular quantification using balanced Steady-State Free Precession MR Fingerprinting Open
This study proposes a novel, contrast-free Magnetic Resonance Fingerprinting (MRF) method using balanced Steady-State Free Precession (bSSFP) sequences for the quantification of cerebral blood volume (CBV), vessel radius (R), and relaxomet…
View article: Within-exam automatic brain segmentation for accurate and reproducible geometry planning - An open-source tool, illustrated for MRS volume selection
Within-exam automatic brain segmentation for accurate and reproducible geometry planning - An open-source tool, illustrated for MRS volume selection Open
International audience
View article: Enhancing MR vascular Fingerprinting with realistic microvascular geometries
Enhancing MR vascular Fingerprinting with realistic microvascular geometries Open
Magnetic resonance (MR) vascular Fingerprinting proposes to use the MR Fingerprinting framework to quantitatively and simultaneously map several characteristics that emerge from vascular structure much smaller than voxel size. The initial …
View article: Searching for an MR Fingerprinting sequence to measure brain oxygenation without contrast agent
Searching for an MR Fingerprinting sequence to measure brain oxygenation without contrast agent Open
We propose to use numerical simulations and Monte Carlo approaches to test 40 MR fingerprinting sequences for their ability to quantify the BOLD effect and provide maps of baseline blood oxygen saturation without the need for contrast agen…
View article: Enhancing MR vascular Fingerprinting through realistic microvascular geometries
Enhancing MR vascular Fingerprinting through realistic microvascular geometries Open
MR vascular Fingerprinting proposes to use the MR Fingerprinting framework to quantitatively and simultaneously map several microvascular characteristics at a sub-voxel scale. The initial implementation assessed the local blood oxygenation…
View article: Using 3D realistic blood vessel structures machine learning for MR vascular Fingerprinting
Using 3D realistic blood vessel structures machine learning for MR vascular Fingerprinting Open
International audience
View article: MP3: Medical Software for Processing Multi-Parametric Images Pipelines
MP3: Medical Software for Processing Multi-Parametric Images Pipelines Open
This article presents an open source software able to convert, display, and process medical images. It differentiates itself from the existing software by its ability to design complex processing pipelines and to wisely execute them on a l…
View article: Optimizing signal patterns for MR vascular fingerprinting
Optimizing signal patterns for MR vascular fingerprinting Open
International audience
View article: Dictionary-based Learning in MR Fingerprinting: Statistical Learning versus Deep Learning
Dictionary-based Learning in MR Fingerprinting: Statistical Learning versus Deep Learning Open
International audience
View article: MRI Signals Simulation for Validation of a New Microvascular Characterization
MRI Signals Simulation for Validation of a New Microvascular Characterization Open
Conventional MRI techniques are not convenient when it comes to study cerebral microvascularization due to the length of the scans needed. A technique called Magnetic Resonance Fingerprinting (MRF) is an excellent candidate to solve this p…