Explanipedia

In Vitro and In Vivo Photothermal and Photoacoustic Activities of Polymeric Nanoparticles Loaded with Nickel, Palladium, and Platinum‐Bis(dithiolene) Complexes Open

Franck Camerel, Jean‐Baptiste Pluta, Lamiaa M. A. Ali, Romain Guecheichia, V. Masse , et al. · 2025

The development of nanosystems with enhanced photothermal and photoacoustic properties is crucial for advancing theranostic applications in cancer therapy. This study explores polymeric nanoparticles (NPs) constituted by a biocompatible po…

Twelve Years of LabEx PRIMES (2012-2024) Open

Françoise Peyrin, D. Dauvergne, Olivier Beuf, Jean-François Adam, Olivier Bernard , et al. · 2025

An overview of the research performed in the Auvergne Rhône Alpes Region within theLaboratoire d’Excellence Physics, Radiobiology, Medical Imaging, and Simulation

Volumetric Estimation of the Backscatter Coefficient With a Matrix Probe Open

Valentin Mazellier, François Varray, Pauline Muleki-Seya · 2025

Evaluation of the backscatter coefficient (BSC) from soft tissues has many applications for medical diagnosis. However, electronic noise and spatial variations often affect BSC estimation, requiring spatial averaging inside a region of in…

Computationally Efficient SVD Filtering for Ultrasound Flow Imaging and Real-Time Application to Ultrafast Doppler Open

Baptiste Pialot, Francesco Guidi, Giulio Bonciani, François Varray, T. Loupas , et al. · 2024

Over the past decade, ultrasound microvasculature imaging has seen the rise of highly sensitive techniques, such as ultrafast power Doppler (UPD) and ultrasound localization microscopy (ULM). The cornerstone of these techniques is the acqu…

Microbubble detection using Neyman-Pearson theory for volumetric ultrasound localization microscopy Open

Valentin Mazellier, Georges Chabouh, Olivier Couture, Pauline Muleki-Seya, François Varray · 2024

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RF Channel-Based Adaptive Beamforming for 3D Ultrasound Localization Microscopy Open

Georges Chabouh, Baptiste Pialot, Louise Denis, Raphaël Dumas, Olivier Couture , et al. · 2024

Ultrasound Localization Microscopy (ULM) has been applied in various preclinical settings and in the clinic to reveal the microvasculature in deep organs. However, most ULM images employ standard Delay-and-Sum (DAS) beamforming. In standar…

Boosting Cardiac Color Doppler Frame Rates With Deep Learning Open

Julia Puig, Denis Friboulet, Hang Jung Ling, François Varray, Michael Mougharbel , et al. · 2024

Color Doppler echocardiography enables visualization of blood flow within the heart. However, the limited frame rate impedes the quantitative assessment of blood velocity throughout the cardiac cycle, thereby compromising a comprehensive a…

Investigating the three-dimensional myocardial micro-architecture in the laminar structure using X-ray phase-contrast microtomography Open

Shunli Wang, Yan Wang, Zhaorui Li, Yifei Zhao, Ying Zhang , et al. · 2024

An Inverse Method Using Cross-Spectral Matrix Fitting for Passive Cavitation Imaging Open

Célestine Lachambre, Adrian Basarab, Jean-Christophe Béra, Barbara Nicolas, François Varray , et al. · 2024

High-intensity focused ultrasound (HIFU) can produce cavitation, which requires monitoring for specific applications such as sonoporation, targeted drug delivery, or histotripsy. Passive acoustic mapping has been proposed in the literature…

SIMUS3: An open-source simulator for 3-D ultrasound imaging Open

Damien Garcia, François Varray · 2024

This work extends the capabilities of existing CUI tools and provides researchers with valuable resources for advanced ultrasound simulations.

Simus3: An Open-Source Simulator for 3-D Ultrasound Imaging Open

Damien Garcia, François Varray · 2024

3-D Passive Cavitation Imaging Using Adaptive Beamforming and Matrix Array Transducer With Random Apodization Open

Audrey sivadon, François Varray, Jean-Christophe Béra, Barbara Nicolas, B. Gilles · 2023

With the development of promising cavitation-based treatments, the interest in cavitation monitoring with passive acoustic mapping (PAM) is significantly increasing. While most of studies regarding PAM are performed in 2-D, 3-D imaging mod…

Ultrafast Cardiac Imaging Using Deep Learning for Speckle-Tracking Echocardiography Open

Jingfeng Lu, Fabien Millioz, François Varray, Jonathan Porée, Jean Provost , et al. · 2023

High-quality ultrafast ultrasound imaging is based on coherent compounding from multiple transmissions of plane waves (PW) or diverging waves (DW). However, compounding results in reduced frame rate, as well as destructive interferences fr…

Cross-spectral matrix fitting for passive mapping of the ultrasonic cavitation based on Elastic-net regularization Open

Célestine Lachambre, Adrian Basarab, Jean-Christophe Béra, Barbara Nicolas, François Varray , et al. · 2023

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Ultrafast Cardiac Imaging Using Deep Learning For Speckle-Tracking Echocardiography Open

Jingfeng Lu, Fabien Millioz, François Varray, Jonathan Porée, Jean Provost , et al. · 2023

High-quality ultrafast ultrasound imaging is based on coherent compounding from multiple transmissions of plane waves (PW) or diverging waves (DW). However, compounding results in reduced frame rate, as well as destructive interferences fr…

Nonlinear Beamforming Based on Amplitude Coherence Applied to Ultrasonic Imaging of Coarse-Grained Steels Open

Ewen Carcreff, Nans Laroche, François Varray, Barbara Nicolas · 2023

This paper deals with ultrasonic imaging in a nondestructive evaluation (NDE) context. In particular, we are focused on the inspection of coarse-grained steels having a heterogeneous composition that creates structural noise in the ultraso…

3-D High Frame Rate Imaging With Motion Compensation (3-D HFR With MoCo): An Experimental Evaluation Open

Sébastien Salles, François Varray, Damien Garcia, Hervé Liebgott, Barbara Nicolas · 2023

Improving the image quality of 3D high-frame-rate (HFR) echocardiography has become an important research focus. Diverging Waves techniques have already shown promising results in 3D ultrasound imaging. However, phase delays induced by lar…

Adaptive noise reduction for power Doppler imaging using SVD filtering in the channel domain and coherence weighting of pixels Open

Baptiste Pialot, Célestine Lachambre, Antonio Lorente Mur, Lionel Augeul, Lorena Petrusca , et al. · 2022

Objective . Ultrafast power Doppler (UPD) is an ultrasound method that can image blood flow at several thousands of frames per second. In particular, the high number of data provided by UPD enables the use of singular value decomposition (…

Oscillation of the orientation of cardiomyocyte aggregates in human left ventricle free wall Open

Shunli Wang, Junning Cui, Yuhan Jing, François Varray · 2022

Orientation of local cardiomyocyte aggregates in the human left ventricle free wall experiences an oscillation in the laminar structure regions, besides its gradual change trend. We described this oscillation using five transmural samples …

L'imagerie spectrale pour améliorer le diagnostic médical Open

Simon Rit, Bruno Montcel, François Varray, Pauline Muleki Seya, H. Ratiney · 2022

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Utilisation des Outils de Recherche pour la Pédagogie en Imagerie Médicale Ultrasonore Open

Adeline Bernard, Julien Huillery, Hervé Liebgott, François Varray, Barbara Nicolas · 2022

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SIMUS: An open-source simulator for medical ultrasound imaging. Part II: Comparison with four simulators Open

Amanda Cigier, François Varray, Damien Garcia · 2022

Sensitivity Enhancement Using Chirp Transmission for an Ultrasound Arthroscopic Probe Open

Baptiste Pialot, Adeline Bernard, Hervé Liebgott, François Varray · 2022

International audience

The IPASC data format: A consensus data format for photoacoustic imaging Open

Janek Gröhl, Lina Hacker, Ben Cox, Kris K. Dreher, Stefan Morscher , et al. · 2022

Measurement of local orientation of cardiomyocyte aggregates in human left ventricle free wall samples using X-ray phase-contrast microtomography Open

Shunli Wang, François Varray, Wanyu Liu, Patrick Clarysse, Isabelle E. Magnin · 2021

Block-Wise 3D Ultrasound Image Super-Resolution Open

K. T. Nwigbo, Duong-Hung Pham, François Varray, Adrian Basarab, Denis Kouamé · 2021

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In Vitro and In Vivo Multispectral Photoacoustic Imaging for the Evaluation of Chromophore Concentration Open

Aneline Dolet, Rita Ammanouil, Virginie Pétrilli, Cédric Richard, Piero Tortoli , et al. · 2021

Multispectral photoacoustic imaging is a powerful noninvasive medical imaging technique that provides access to functional information. In this study, a set of methods is proposed and validated, with experimental multispectral photoacousti…

Sparse Convolutional Beamforming for 3-D Ultrafast Ultrasound Imaging Open

Regev Cohen, Nitai Fingerhut, François Varray, Hervé Liebgott, Yonina C. Eldar · 2021

Real-time three dimensional (3D) ultrasound provides complete visualization of inner body organs and blood vasculature, which is crucial for diagnosis and treatment of diverse diseases. However, 3D systems require massive hardware due to t…

SIMUS: an open-source simulator for ultrasound imaging. Part II: comparison with three popular simulators Open

Amanda Cigier, François Varray, Damien Garcia · 2021

Computational ultrasound imaging has become a well-established methodology in the ultrasound community. In the accompanying paper (part I), we described a new ultrasound simulator (SIMUS) for Matlab, which belongs to the Matlab UltraSound …

Simus: An Open-Source Simulator for Medical Ultrasound Imaging. Part II: Comparison with Three Popular Simulators Open

Amanda Cigier, François Varray, Damien Garcia · 2021

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