Results 51 to 60 of about 59,543 (358)

Inverse Transport Theory of Photoacoustics

, 2009
We consider the reconstruction of optical parameters in a domain of interest from photoacoustic data. Photoacoustic tomography (PAT) radiates high frequency electromagnetic waves into the domain and measures acoustic signals emitted by the resulting ...
Alexandre Jollivet, Ammari H, Bal G, Bal G, Bal G Uhlmann G, Bergh J, Choulli M, Cox B T, Dautray R, Guillaume Bal, McDowall S R Tamasan A Stefanov P, Patch S, Stefanov P, Vincent Jugnon   +13 more
core   +1 more source

Probing equilibrium glass flow up to exapoise viscosities [PDF]

, 2015
Glasses are out-of-equilibrium systems aging under the crystallization threat. During ordinary glass formation, the atomic diffusion slows down rendering its experimental investigation impractically long, to the extent that a timescale divergence is ...
Cerullo, G., Ferrante, C., Pogna, E. A. A., Rodríguez-Tinoco, C., Rodríguez-Viejo, J., Scopigno, T.   +5 more
core   +2 more sources

Wall losses in straight ducts with non-circular cross sections: a scaling rule of identical losses for wooden flue organ pipes

Acta Acustica
Viscothermal effects at the walls are the dominant sources of loss in the air columns of various types of wind instruments. The classical theory of viscous and thermal boundary layers gives an analytical result that allows for computing the wall losses ...
Rucz Péter, Fontestad Elena Esteve, Angster Judit, Miklós András   +3 more
doaj   +1 more source

Photoacoustic-Based Gas Sensing: A Review

Sensors, 2020
The use of the photoacoustic effect to gauge the concentration of gases is an attractive alternative in the realm of optical detection methods. Even though the effect has been applied for gas sensing for almost a century, its potential for ultra ...
Stefan Palzer
doaj   +1 more source

Application of the Photoacoustic Approach in the Characterization of Nanostructured Materials

Nanomaterials, 2022
A new generation of sensors can be engineered based on the sensing of several markers to satisfy the conditions of the multimodal detection principle. From this point of view, photoacoustic-based sensing approaches are essential. The photoacoustic effect
Mykola Isaiev, Gauhar Mussabek, Pavlo Lishchuk, Kateryna Dubyk, Nazym Zhylkybayeva, Gulmira Yar-Mukhamedova, David Lacroix, Vladimir Lysenko   +7 more
doaj   +1 more source

High power visible light emitting diodes as pulsed excitation sources for biomedical photoacoustics

Biomedical Optics Express, 2016
The use of visible light emitting diodes (LEDs) as an alternative to Q-switched lasers conventionally used as photoacoustic excitation sources has been explored.
T. Allen, P. Beard
semanticscholar   +1 more source

Tutorial on photoacoustic tomography [PDF]

Journal of Biomedical Optics, 2016
Photoacoustic tomography (PAT) has become one of the fastest growing fields in biomedical optics. Unlike pure optical imaging, such as confocal microscopy and two-photon microscopy, PAT employs acoustic detection to image optical absorption contrast with high-resolution deep into scattering tissue.
Zhou, Yong, Yao, Junjie, Wang, Lihong V.
openaire   +4 more sources

Optoacoustic Imaging in Inflammation

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   +1 more source

A Robust and Secure Palm Vessel Biometric Sensing System Based on Photoacoustics

IEEE Sensors Journal, 2018
In this paper, we propose a new palm vessel biometric sensing system based on photoacoustic imaging, which is an emerging technique that allows high-resolution visualization of optical absorption in deep tissue.
Yuehang Wang, Zhengxiong Li, Tri Vu, Nikhila Nyayapathi, K. Oh, Wenyao Xu, J. Xia   +6 more
semanticscholar   +1 more source

Photoacoustic clinical imaging

Photoacoustics, 2019
Photoacoustic is an emerging biomedical imaging modality, which allows imaging optical absorbers in the tissue by acoustic detectors (light in - sound out). Such a technique has an immense potential for clinical translation since it allows high resolution, sufficient imaging depth, with diverse endogenous and exogenous contrast, and is free from ...
Idan Steinberg, David M. Huland, Ophir Vermesh, Hadas E. Frostig, Willemieke S. Tummers, Sanjiv S. Gambhir   +5 more
openaire   +3 more sources