Article
Acoustics
Fabian Reuter, Carsten Deiter, Claus -Dieter Ohl
Summary: This study reveals the mechanism behind energy focusing during the non-spherical collapse of cavitation bubbles, leading to the erosion of hardened metals. Using high-speed imaging and shockwave recording, the conditions for this focusing process and its damage to solids are resolved.
ULTRASONICS SONOCHEMISTRY
(2022)
Article
Mechanics
Ulisses J. Gutierrez-Hernandez, Fabio De Colle, Claus-Dieter Ohl, Pedro A. Quinto-Su
Summary: In this work, a Fresnel-lens-inspired method is proposed and demonstrated for focusing multiple laser-induced shock waves through time-delay superposition at arbitrary locations. The method has been successfully demonstrated experimentally, showing effectiveness under specific geometric conditions and good agreement with simulation results.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Mechanics
Mohammad Khavari, Abhinav Priyadarshi, Andrew Hurrell, Koulis Pericleous, Dmitry Eskin, Iakovos Tzanakis
Summary: This study investigates the shock wave pressures emitted by cavitating bubbles in water under ultrasonic excitation, revealing a resonance peak at a narrow range of frequencies and suggesting its association with shock wave emissions from collapsing bubbles. Results show an increasing pressure shielding effect with higher input power.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Mechanics
Ulisses J. Gutierrez-Hernandez, Hendrik Reese, Claus-Dieter Ohl, Pedro A. Quinto-Su
Summary: Researchers have discovered that acoustic cavitation at high frequencies can be achieved through wave propagation in a solid medium. By nucleating cavitation bubbles at nano-sized fractures on a glass substrate and driving their expansion with a leaky Rayleigh wave, and their collapse with a trailing shock wave, the lifetime of the bubbles can be controlled. Experimental results align with simulation models.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Mechanics
Wangxia Wu, Qingquan Liu, Bing Wang
Summary: The study numerically investigates high-speed droplet impingement on typical curved surfaces to analyze complex wave structures and cavitation. The analysis includes the evolution of confined shock waves, cavities, and pressure distribution on concave, convex, and flat surfaces, showing different impacts on shock wave strength and cavitation behavior.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Materials Science, Multidisciplinary
Jianhui Liu, Sarah L. Perry, Ben Zhong Tang, Matthew V. Tirrell
Summary: This study reports pH-responsive complex coacervates that remain intact under acidic conditions and dissolve in alkaline conditions, showing potential for oral delivery to the gastrointestinal tract.
Article
Mechanics
Jing Luo, Weilin Xu, Boo Cheong Khoo
Summary: The study found that the relative distance and size between the cavitation bubble and air bubble play a dominant role in the stratification effect exerted by the air bubble on the shock wave. When the two bubbles merge, the energy and pressure peak of the shock wave decrease significantly to less than 40% of the original values.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Mechanics
Xiao-Xuan Liang, Norbert Linz, Sebastian Freidank, Gunther Paltauf, Alfred Vogel
Summary: The dynamics of spherical laser-induced cavitation bubbles in water were investigated using experimental techniques and numerical simulations. The study revealed the oscillation characteristics, gas content, and shock wave emission of the bubbles, and analyzed the motion velocity of the bubble wall and energy distribution.
JOURNAL OF FLUID MECHANICS
(2022)
Article
Chemistry, Multidisciplinary
Elahe Memari, Fiona Hui, Hossein Yusefi, Brandon Helfield
Summary: This study aimed to investigate the effect of fluid flow rate and repeated short-pulse ultrasound on microbubble-mediated endothelial cell permeability. The results demonstrate that fast-flowing microbubbles significantly increased cell membrane permeability, and multiple short pulses of ultrasound also elevated endothelial cell permeability.
JOURNAL OF CONTROLLED RELEASE
(2023)
Article
Multidisciplinary Sciences
Louis William Rogowski, Min Jun Kim
Summary: A newly discovered propulsion mechanism allows chemically coated microparticles to swim through mucus solution, with certain functionalizations altering propulsion behavior. The relationship between different chemical coatings, microparticle velocity, and controllability was explored, showing potential to enhance drug delivery methods and medical techniques utilizing micro/nanoparticles.
SCIENTIFIC REPORTS
(2022)
Article
Acoustics
Randall P. Williams, Maria M. Karzova, Petr V. Yuldashev, Azamat Z. Kaloev, Fedor A. Nartov, Vera A. Khokhlova, Bryan W. Cunitz, Kyle P. Morrison, Tatiana D. Khokhlova
Summary: Pulsed high-intensity focused ultrasound (pHIFU) is used to induce inertial cavitation in tissue without contrast agents. The performance of a dual-mode ultrasound array for image-guided pHIFU therapies was characterized. The array showed the ability to produce inertial cavitation and ultrasound imaging, as well as B-mode imaging of targets in phantoms and pig tissues at depths relevant to pHIFU applications.
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL
(2023)
Article
Chemistry, Multidisciplinary
Yi-Ju Ho, Ho-Chun Chang, Chia-Wei Lin, Ching-Hsiang Fan, Yu-Chun Lin, Kuo-Chen Wei, Chih-Kuang Yeh
Summary: Drug-loaded microbubbles combined with ultrasound excitation for targeted drug release have shown to improve drug delivery efficiency by modulating targeted microbubble oscillation. Stable cavitation enhances cell permeability and cell viability, leading to increased in vivo vesicle release on tumor vessels. This strategy may have potential applications in tissue repair or neuromodulation.
JOURNAL OF CONTROLLED RELEASE
(2021)
Review
Engineering, Biomedical
Sepehr Talebian, Timothy Schofield, Peter Valtchev, Aaron Schindeler, John M. Kavanagh, Qayyum Adil, Fariba Dehghani
Summary: The potential health benefits of probiotics may not be realized due to their reduced viability during storage and gastrointestinal transit. Microencapsulation using biopolymers has been utilized to improve the resistance of probiotics to critical conditions. However, most existing methods only provide single layer protection, which is less effective than more sophisticated approaches. This review discusses emerging methods for multilayer encapsulation of probiotics using biopolymers, and examines the correlation between fabrication techniques and microparticle properties. Novel materials and approaches for multilayer structures are highlighted.
ADVANCED HEALTHCARE MATERIALS
(2022)
Article
Biophysics
L. Somaglino, L. Mousnier, A. Giron, W. Urbach, N. Tsapis, N. Taulier
Summary: Polymeric nanoparticles are being studied as potential drug carriers, and their drug release can be enhanced by triggering with ultrasound. However, the release is only significantly increased in the presence of detectable inertial cavitation.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Chuanhui Song, Xiangyi Wu, Yu Wang, Jinglin Wang, Yuanjin Zhao
Summary: Inspired by the behavior of cuttlefish expelling ink, this study developed thermal-responsive melanin-integrated porous microparticles for periodontitis treatment. These microparticles can release melanin nanoparticles under near-infrared irradiation, exhibiting antibacterial activity and anti-inflammatory properties, demonstrating promising therapeutic effects.
Article
Clinical Neurology
Nicolas Asquier, Guillaume Bouchoux, Michael Canney, Cyril Martin, Bruno Law-Ye, Delphine Leclercq, Jean-Yves Chapelon, Cyril Lafon, Ahmed Idbaih, Alexandre Carpentier
JOURNAL OF NEUROSURGERY
(2020)
Article
Gastroenterology & Hepatology
Marine Camus, Ariane Vienne, Jean-Louis Mestas, Carlos Pratico, Carole Nicco, Christiane Chereau, Jean-Martial Marie, Alexei Moussatov, Gilles Renault, Frederic Batteux, Cyril Lafon, Frederic Prat
CLINICS AND RESEARCH IN HEPATOLOGY AND GASTROENTEROLOGY
(2019)
Article
Urology & Nephrology
Thomas Hostiou, Albert Gelet, Jean-Yves Chapelon, Olivier Rouviere, Florence Mege-Lechevalier, Cyril Lafon, Helene Tonoli-Catez, Lionel Badet, Sebastien Crouzet
Article
Acoustics
Francis Bessiere, Ali Zorgani, Jade Robert, Loic Daunizeau, Elodie Cao, Fanny Vaillant, Emma Abell, Bruno Quesson, Stephane Catheline, Philippe Chevalier, Cyril Lafon
ULTRASOUND IN MEDICINE AND BIOLOGY
(2020)
Article
Acoustics
C. -A. Philip, S. Warembourg, M. Dairien, C. Lefevre, A. Gelet, F. Chavrier, N. Guillen, H. Tonoli, E. Maissiat, C. Lafon, G. Dubernard
ULTRASOUND IN OBSTETRICS & GYNECOLOGY
(2020)
Article
Multidisciplinary Sciences
R. Leenhardt, M. Camus, J. L. Mestas, M. Jeljeli, E. Abou Ali, S. Chouzenoux, B. Bordacahar, C. Nicco, F. Batteux, C. Lafon, F. Prat
SCIENTIFIC REPORTS
(2019)
Article
Chemistry, Applied
Karthik Subramani, Balu Kolathupalayam Shanmugam, Suriyaprabha Rangaraj, Vinoth Murugan, Surendhiran Srinivasan, Oscar Komla Awitor, Chiristophe Massard, Rajendran Venkatachalam
JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH
(2020)
Article
Acoustics
Cyril Lafon, David Moore, Matthew D. C. Eames, John Snell, Robert Andrew Drainville, Frederic Padilla
Summary: Transcranial high-intensity focused ultrasound is a promising treatment for brain disorders, but high energy can lead to undesired cavitation. This study evaluated the use of gated sonication to increase cavitation threshold and assessed heating capabilities. Results showed that gated sonication required higher pressure levels for cavitation initiation after propagation through a human skull and resulted in lower cavitation activity compared to continuous sonication. Additionally, heating capabilities were not affected by gated sonication, making it a potential alternative to continuous sonication when cavitation onset is a concern.
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL
(2021)
Article
Acoustics
Jade Robert, Francis Bessiere, Elodie Cao, Virginie Loyer, Emma Abell, Fanny Vaillant, Bruno Quesson, Stefan Catheline, Cyril Lafon
Summary: This study introduces a novel method to characterize cardiac activation based on the time evolution and instantaneous frequency content. The method was validated on an ex vivo dataset and successfully implemented on animals during experiments to map cardiac activation.
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL
(2022)
Review
Oncology
Maxime Lafond, Thomas Lambin, Robert Andrew Drainville, Aurelien Dupre, Mathieu Pioche, David Melodelima, Cyril Lafon
Summary: Pancreatic ductal adenocarcinoma (PDAC) is a highly lethal form of cancer with poor prognosis. Focused ultrasound is an emerging therapy that shows promising potential in treating PDAC. This review provides an overview of the clinical application and scientific research of therapeutic focused ultrasound for PDAC, summarizing its current benefits, challenges, and future directions.
Article
Acoustics
Myleva Dahan, Marion Cortet, Cyril Lafon, Frederic Padilla
Summary: This review summarizes the latest research progress in the treatment of breast cancer and evaluates the potential of combining therapeutic ultrasound with other treatment modalities.
JOURNAL OF ULTRASOUND IN MEDICINE
(2023)
Article
Radiology, Nuclear Medicine & Medical Imaging
Wafae Labriji, Julien Clauzel, Jean-Louis Mestas, Maxime Lafond, Cyril Lafon, Anne-Sophie Salabert, Lydiane Hirschler, Jan M. Warnking, Emmanuel L. Barbier, Isabelle Loubinoux, Franck Desmoulin
Summary: The purpose of this study was to investigate the effect of Blood Brain Barrier (BBB) opening using ultrasound combined with microbubbles injection on cerebral blood flow in rats. The results showed that BBB opening induced by microbubble intravenous injection led to transient hypoperfusion, which shared some similarities with cortical spreading depression phenomenon.
MAGNETIC RESONANCE IN MEDICINE
(2023)
Article
Physics, Applied
A. Ganeau, M. Lafond, F. Legrand, G. Laloy-Borgna, O. Ben Moussa, S. Poinard, F. Mascarelli, G. Thuret, P. Gain, C. Lafon, S. Catheline
Summary: This study characterizes the viscoelastic properties of in vitro crystalline lens samples using a curvilinear harmonic method based on noise correlation algorithms. The study observes the dispersion of surface waves at different frequencies and provides accurate measurements of shear elasticity and viscosity. The findings have implications for potential treatments of presbyopia.
APPLIED PHYSICS LETTERS
(2023)
Article
Acoustics
Robert Andrew Drainville, Sylvain Chatillon, David Moore, John Snell, Frederic Padilla, Cyril Lafon
Summary: This study investigates how imprecision in model inputs affects the quality of acoustic focusing through the skull using a ray-tracing simulation model. New methods to optimize ray-tracing skull simulations for clinical treatment planning are proposed and validated using experimental data from ex-vivo human skulls.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2023)
Meeting Abstract
Gastroenterology & Hepatology
Sandrine Brugiroux, Thomas Sauvaitre, Gwenaelle Roche, Celia Ledieu, Caroline Chevarin, Catherine Godfraind, Christophe Massard, Oscar Awitor, Nicolas Barnich, Mathilde Bonnet, Delphine Boucher