Julien Wojak
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View article: Comparative Evaluation of Graph Construction Methods for Individual Brain Metabolic Network from FDG-PET Images: an ADNI study in Healthy Subjects
Comparative Evaluation of Graph Construction Methods for Individual Brain Metabolic Network from FDG-PET Images: an ADNI study in Healthy Subjects Open
Purpose: Connectivity analyses of fluorodeoxyglucose positron emission tomography (FDG-PET) static images provides a valuable means of investigating brain network organization by capturing metabolic activity at rest. Graph theory is emerge…
View article: NIR and SWIR Continuous Wave Diffuse Optical Tomography from a Wearable Device Setup
NIR and SWIR Continuous Wave Diffuse Optical Tomography from a Wearable Device Setup Open
This paper presents absorption reconstruction by diffuse optical tomography from two infrared wavelength measurements using a reflection configuration proposed on a wearable device dedicated to diffuse imaging of biological tissues.
View article: Simulated Near Infrared Database for Fluorescence Diffuse Optical Tomography
Simulated Near Infrared Database for Fluorescence Diffuse Optical Tomography Open
This paper presents a methodology for constructing a simulated fluorescence tomography database. It details dataset generation, geometry, optical properties, solvers and data processing. The database ensures reproducibility and supports AI…
View article: Reconstruction of the opto-mechanical properties of the intervertebral disc with photoacoustic imaging
Reconstruction of the opto-mechanical properties of the intervertebral disc with photoacoustic imaging Open
The intervertebral disc (IVD) is an essential component of the spine, serving as a shock absorber that enables flexibility and movement. Due to aging, the IVD undergoes degeneration, characterised by dehydration, which can lead to conditio…
View article: Reconstruction of the opto-mechanical properties of the intervertebral disc with photoacoutic imaging
Reconstruction of the opto-mechanical properties of the intervertebral disc with photoacoutic imaging Open
The intervertebral disc (IVD) is an essential component of the spine, serving as a shock absorber that enables flexibility and movement. Due to aging, the IVD undergoes degeneration, characterised by dehydration, which can lead to conditio…
View article: A comprehensive model of depth-resolved polarization gating imaging
A comprehensive model of depth-resolved polarization gating imaging Open
A simplified Mueller Matrix decomposition model is proposed to describe depth probing of biological tissues using wide-field polarization gating. The model, with elliptically polarized light, facilitates quantitative retrieval of polarizat…
View article: Reconstruction of the opto-mechanical properties of the intervertebral disc with photoacoutic imaging
Reconstruction of the opto-mechanical properties of the intervertebral disc with photoacoutic imaging Open
The intervertebral disc undergoes degeneration, resulting in its dehydration and the development of degenerative diseases. This study introduces quantitative photoacoustic imaging as a method for assessing the state of the disc.
View article: Abstracts from the MYO-MRI+ 2023 | Imaging in Neuromuscular Disease Conference
Abstracts from the MYO-MRI+ 2023 | Imaging in Neuromuscular Disease Conference Open
Background: Many patients with Duchenne muscular dystrophy (DMD) have neurobehavioral problems. Corticosteroids, the primary pharmacological treatment for DMD, have been shown to affect brain morphology in other conditions, but data in DMD…
View article: Assessing the internal composition of the intervertebral disc with photoacoustic imaging: a numerical study
Assessing the internal composition of the intervertebral disc with photoacoustic imaging: a numerical study Open
International audience
View article: Connecting Coronal 3D Electron Density from Tomographic Reconstruction to In-situ Measurements from Parker Solar Probe
Connecting Coronal 3D Electron Density from Tomographic Reconstruction to In-situ Measurements from Parker Solar Probe Open
There are few possibilities to put the in-situ measurements of the coronal electron density such as obtained by the Parker Solar Probe (PSP) in the context of the 3D configuration of the corona and its structure. One of them consists in us…
View article: Synthetic computed tomography generation for abdominal adaptive radiotherapy using low-field magnetic resonance imaging
Synthetic computed tomography generation for abdominal adaptive radiotherapy using low-field magnetic resonance imaging Open
U-Net and cGAN architectures are able to generate abdominal sCT images fast and accurately from low field MRI.
View article: Schéma de segmentation par apprentissage profond sur des images de microscopie de Mueller pour la quantification du collagène et de l’élastine du col de l’utérus
Schéma de segmentation par apprentissage profond sur des images de microscopie de Mueller pour la quantification du collagène et de l’élastine du col de l’utérus Open
International audience
View article: DÉTERMINATION DE LA VIABILITÉ DU DISQUE INTERVERTÉBRAL PAR IMAGERIE PHOTOACOUSTIQUE QUANTITATIVE
DÉTERMINATION DE LA VIABILITÉ DU DISQUE INTERVERTÉBRAL PAR IMAGERIE PHOTOACOUSTIQUE QUANTITATIVE Open
International audience
View article: Bladder Wall Segmentation and Characterization on MR Images: Computer-Aided Spina Bifida Diagnosis
Bladder Wall Segmentation and Characterization on MR Images: Computer-Aided Spina Bifida Diagnosis Open
(1) Background: Segmentation of the bladder inner’s wall and outer boundaries on Magnetic Resonance Images (MRI) is a crucial step for the diagnosis and the characterization of the bladder state and function. This paper proposes an optimiz…
View article: Quantitative Photoacoustic Reconstruction of the Optical Properties of Intervertebral Discs Using a Gradient Descent Scheme
Quantitative Photoacoustic Reconstruction of the Optical Properties of Intervertebral Discs Using a Gradient Descent Scheme Open
The intervertebral discs (IVD) are among the essential organs of the human body, ensuring the mobility of the spine. These organs possess a high proportion of water. However, as the discs age, this content decreases, which can potentially …
View article: Assessment of intervertebral disks viability with quantitative photoacoustic tomography
Assessment of intervertebral disks viability with quantitative photoacoustic tomography Open
International audience
View article: Multi-View Separable Pyramid Network for AD Prediction at MCI Stage by <sup>18</sup>F-FDG Brain PET Imaging
Multi-View Separable Pyramid Network for AD Prediction at MCI Stage by <sup>18</sup>F-FDG Brain PET Imaging Open
Alzheimer's Disease (AD), one of the main causes of death in elderly people, is characterized by Mild Cognitive Impairment (MCI) at prodromal stage. Nevertheless, only part of MCI subjects could progress to AD. The main objective of this p…
View article: Validation of the Alfvén Wave Solar Atmosphere Model (AWSoM) with Observations from the Low Corona to 1 au
Validation of the Alfvén Wave Solar Atmosphere Model (AWSoM) with Observations from the Low Corona to 1 au Open
We perform a validation study of the latest version of the Alfvén Wave Solar atmosphere Model (AWSoM) within the Space Weather Modeling Framework. To do so, we compare the simulation results of the model with a comprehensive suite of obser…
View article: Stimulated Raman histology: one to one comparison with standard hematoxylin and eosin staining
Stimulated Raman histology: one to one comparison with standard hematoxylin and eosin staining Open
We present for the first time one-to-one correspondence between standard hematoxylin/eosin (H&E) stained tissue sections and stimulated Raman histology (SRH) - a label-free technique in which stimulated Raman scattering (SRS) and second ha…
View article: Fast stimulated Raman and second harmonic generation imaging for intraoperative gastro-intestinal cancer detection
Fast stimulated Raman and second harmonic generation imaging for intraoperative gastro-intestinal cancer detection Open
View article: Diffuse optical tomography with polarized light: a GPU-accelerated polarization-sensitive Monte Carlo simulations for efficient sensitivity kernel computation
Diffuse optical tomography with polarized light: a GPU-accelerated polarization-sensitive Monte Carlo simulations for efficient sensitivity kernel computation Open
An efficient GPU-based Monte Carlo (MC) simulator for modeling polarized light propagation in scattering media is reported.By using reciprocity relations, the inverse problem for Diffuse Optical Tomography with polarized light is formulate…
View article: Coronal Mass Ejections over Solar Cycles 23 and 24
Coronal Mass Ejections over Solar Cycles 23 and 24 Open
View article: Diffuse Optical Tomography with polarized light: a GPU-accelerated polarization-sensitive Monte Carlo simulations for efficient Sensitivity Kernel computation
Diffuse Optical Tomography with polarized light: a GPU-accelerated polarization-sensitive Monte Carlo simulations for efficient Sensitivity Kernel computation Open
View article: Alzheimer’s Disease Computer-Aided Diagnosis on Positron Emission Tomography Brain Images Using Image Processing Techniques
Alzheimer’s Disease Computer-Aided Diagnosis on Positron Emission Tomography Brain Images Using Image Processing Techniques Open
International audience
View article: Fast stimulated Raman imaging for intraoperative gastro-intestinal cancer detection
Fast stimulated Raman imaging for intraoperative gastro-intestinal cancer detection Open
Conventional haematoxylin, eosin and saffron (HES) histopathology, currently the gold-standard for pathological diagnosis of cancer, requires extensive sample preparations that are achieved within time scales that are not compatible with i…
View article: Fast stimulated Raman imaging for intraoperative gastro-intestinal\n cancer detection
Fast stimulated Raman imaging for intraoperative gastro-intestinal\n cancer detection Open
Conventional haematoxylin, eosin and saffron (HES) histopathology, currently\nthe gold-standard for pathological diagnosis of cancer, requires extensive\nsample preparations that are achieved within time scales that are not\ncompatible wit…
View article: Periodic behaviour of coronal mass ejections, eruptive events, and solar activity proxies during solar cycles 23 and 24
Periodic behaviour of coronal mass ejections, eruptive events, and solar activity proxies during solar cycles 23 and 24 Open
View article: Time-dependent tomographic reconstruction of the solar corona
Time-dependent tomographic reconstruction of the solar corona Open