Results 151 to 160 of about 1,060 (202)

Bioengineered bacterial vesicles for optoacoustics-guided phototherapy

Methods in Enzymology, 2021
Genetically engineered bacterial outer membrane vesicles (OMVs) offer promising applications for gene therapy, immunotherapy, and vaccine delivery. Importantly, OMVs are biocompatible, biodegradable, and easy to engineer and produce on a large scale.
Vasilis Ntziachristos, Vipul Gujrati
exaly   +2 more sources

A method for the calibration of wideband ultrasonic sensors for optoacoustics

Review of Scientific Instruments, 2021
A method for calibration of ultrasonic sensors for optoacoustics that provides both frequency response and sensitivity is presented. In order to obtain the bandwidth and the frequency response of an uncalibrated sensor, a point source with broadband ...
Francisco E Veiras, Martín G. González
exaly   +2 more sources

Calibration of ultrasonic sensors using optoacoustics

Proceedings of SPIE, 2011
Ultrasonic detectors are commonly calibrated by finding their response to incident plane waves. However, in optoacoustics, the response to broadband point sources is required.
Amir Rosenthal, Daniel Razansky, Vasilis Ntziachristos   +2 more
exaly   +2 more sources

Combined real-time ultrasound plane wave compounding and linear array optoacoustics

Proceedings of SPIE, 2015
Paper 95390W, 6 S.In optoacoustic imaging, the high optical contrast between different tissue types is combined with the high-resolution and low scattering of ultrasound.
Steffen Tretbar, Marc Fournelle
exaly   +2 more sources

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Optoacoustic mesoscopy for biomedicine

Nature Biomedical Engineering, 2019
Fuelled by innovation, optical microscopy plays a critical role in the life sciences and medicine, from basic discovery to clinical diagnostics. However, optical microscopy is limited by typical penetration depths of a few hundred micrometres for in vivo interrogations in the visible spectrum.
Murad Omar, Juan Aguirre, Vasilis Ntziachristos   +2 more
openaire   +3 more sources

Optoacoustic pulses in a flame

Optics Letters, 1977
Pulsed pressure waves are produced by energy transfer from electronically excited Na or Li atoms seeded in an acetylene-air flame; the excitation is provided by a resonantly tuned, pulsed laser. Temperature increases of approximately 1 degree within the flame produce signals easily detected by a microphone. A description of the phenomenon is given, and
J E, Allen, W R, Anderson, D R, Crosley
openaire   +2 more sources

Focusing with an optoacoustic transducer

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 1988
A prototype of an ultrasonic transducer has been developed that uses an optical input to control the ultrasonic output. This transducer is called an optoacoustic transducer (OAT) and provides an ultrasonic pattern that is spatially similar to the optical pattern used to illuminate it. When a focus-inducing optical pattern, such as a zone plate, is used,
D P, Shattuck, J, Nouhi
openaire   +2 more sources