Results 11 to 20 of about 1,847 (202)

Optoacoustic Imaging in Inflammation [PDF]

Biomedicines, 2021
Optoacoustic or photoacoustic imaging (OAI/PAI) is a technology which enables non-invasive visualization of laser-illuminated tissue by the detection of acoustic signals. The combination of “light in” and “sound out” offers unprecedented scalability with
Adrian P. Regensburger, Emma Brown, Gerhard Krönke, Maximilian J. Waldner, Ferdinand Knieling   +4 more
doaj   +3 more sources

Frequency-Resolved High-Frequency Broadband Measurement of Acoustic Longitudinal Waves by Laser-Based Excitation and Detection [PDF]

Sensors
Optoacoustics is a metrology widely used for material characterisation. In this study, a measurement setup for the selective determination of the frequency-resolved phase velocities and attenuations of longitudinal waves over a wide frequency range (3–55
Felix Brand, Klaus Stefan Drese
doaj   +2 more sources

Optimization of 3D Passive Acoustic Mapping Image Metrics: Impact of Sensor Geometry and Beamforming Approach [PDF]

Sensors
Three-dimensional passive acoustic mapping (PAM) with matrix arrays typically suffers from high demands on the receiving electronics and high computational load.
Sarah Therre, Marc Fournelle, Steffen Tretbar   +2 more
doaj   +2 more sources

An Integrated Method for the Vibroacoustic Evaluation of a Carbon Fiber Bouzouki

Applied Sciences, 2023
An integrated method, which combines Electronic Speckle Pattern Interferometry, impulse response measurements, finite element method simulations, and psychoacoustic tests, is proposed to evaluate the vibroacoustic behavior of a carbon fiber bouzouki ...
Spyros Brezas, Markos Katsipis, Yannis Orphanos, Evaggelos Kaselouris, Kostas Kechrakos, Nikos Kefaloyannis, Helen Papadaki, Antonis Sarantis-Karamesinis, Stylianos Petrakis, Ioannis Theodorakis, Efstratios Iliadis, Tilemachos Karagkounidis, Ioannis Koumantos, Michael Tatarakis, Makis Bakarezos, Nektarios A. Papadogiannis, Vasilis Dimitriou   +16 more
doaj   +1 more source

A Computational Study of Solid Si Target Dynamics under ns Pulsed Laser Irradiation from Elastic to Melting Regime

Computation, 2023
The dynamic behavior of solid Si targets irradiated by nanosecond laser pulses is computationally studied with transient, thermοmechanical three-dimensional finite element method simulations. The dynamic phase changes of the target and the generation and
Helen Papadaki, Evaggelos Kaselouris, Makis Bakarezos, Michael Tatarakis, Nektarios A. Papadogiannis, Vasilis Dimitriou   +5 more
doaj   +1 more source

A Review of Finite Element Studies in String Musical Instruments

Acoustics, 2022
String instruments are complex mechanical vibrating systems, in terms of both structure and fluid–structure interaction. Here, a review study of the modeling and simulation of stringed musical instruments via the finite element method (FEM) is presented.
Evaggelos Kaselouris, Makis Bakarezos, Michael Tatarakis, Nektarios A. Papadogiannis, Vasilis Dimitriou   +4 more
doaj   +1 more source

Clinical and Translational Imaging and Sensing of Diabetic Microangiopathy: A Narrative Review

Journal of Cardiovascular Development and Disease, 2023
Microvascular changes in diabetes affect the function of several critical organs, such as the kidneys, heart, brain, eye, and skin, among others. The possibility of detecting such changes early enough in order to take appropriate actions renders the ...
Nikolina-Alexia Fasoula, Yi Xie, Nikoletta Katsouli, Mario Reidl, Michael A. Kallmayer, Hans-Henning Eckstein, Vasilis Ntziachristos, Leontios Hadjileontiadis, Dimitrios V. Avgerinos, Alexandros Briasoulis, Gerasimos Siasos, Kaveh Hosseini, Ilias Doulamis, Polydoros N. Kampaktsis, Angelos Karlas   +14 more
doaj   +1 more source

Current state of the research on optoacoustic fiber-optic ultrasonic transducers based on thermoelastic effect and fiber-optic interferometric receivers

Компьютерная оптика, 2023
The work is devoted to an overview of the current state of optoacoustic fiber-optic ultrasonic transducers based on thermoelastic effect and fiber-optic interference receivers, its scope, technologies and materials used, the advantages and disadvantages ...
A.P. Mikitchuk, E.I. Girshova, V.V. Nikolaev   +2 more
doaj   +1 more source

Software-defined optoacoustic tomography

Applied Optics, 2020
In this work we present what we believe is the first application of software-defined optoelectronics (SDO) for bidimensional optoacoustic tomography (OAT). The SDO concept refers to optoelectronic systems where the functionality associated with the conditioning and processing of optical and electrical signals are digitally ...
Roberto M. Insabella, Martín G. González, Lucas M. Riobó, Klaus Hass, Francisco E. Veiras   +4 more
openaire   +4 more sources

Evaluation of Optical and Acoustical Properties of Ba_1−xSr_xTiO₃ Thin Film Material Library via Conjugation of Picosecond Laser Ultrasonics with X-ray Diffraction, Energy Dispersive Spectroscopy, Electron Probe Micro Analysis, Scanning Electron and Atomic Force Microscopies

Nanomaterials, 2021
Wide-range continuous spatial variation of the film composition in lateral compositionally graded epitaxial films requires the development of high throughput measurement techniques for their local and non-destructive characterization with the highest ...
Sathyan Sandeep, Samuel Raetz, Jerome Wolfman, Beatrice Negulescu, Guozhen Liu, Jean-Louis Longuet, Théo Thréard, Vitalyi E. Gusev   +7 more
doaj   +1 more source