Results 31 to 40 of about 26,065 (198)

Biomedical photoacoustic imaging [PDF]

Interface Focus, 2011
Photoacoustic (PA) imaging, also called optoacoustic imaging, is a new biomedical imaging modality based on the use of laser-generated ultrasound that has emerged over the last decade. It is a hybrid modality, combining the high-contrast and spectroscopic-based specificity of optical imaging with the high spatial resolution of ultrasound ...
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Intravascular Photoacoustic Imaging [PDF]

IEEE Journal of Selected Topics in Quantum Electronics, 2010
Intravascular photoacoustic (IVPA) imaging is a catheter-based, minimally invasive, imaging modality capable of providing high-resolution optical absorption map of the arterial wall. Integrated with intravascular ultrasound (IVUS) imaging, combined IVPA and IVUS imaging can be used to detect and characterize atherosclerotic plaques building up in the ...
Bo, Wang, Jimmy L, Su, Andrei B, Karpiouk, Konstantin V, Sokolov, Richard W, Smalling, Stanislav Y, Emelianov   +5 more
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Photoacoustic Resonance Imaging

IEEE Journal of Selected Topics in Quantum Electronics, 2019
In this paper, a new imaging modality, named photoacoustic resonance imaging (PARI), is proposed and experimentally demonstrated. Being distinct from conventional single nanosecond laser pulse induced wideband PA signal, the proposed PARI method utilizes multiburst modulated laser source to induce PA resonant signal with enhanced signal strength and ...
Ruochong Zhang, Fei Gao, Xiaohua Feng, Siyu Liu, Ran Ding, Yuanjin Zheng   +5 more
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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
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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
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Quantitative photoacoustic tomography [PDF]

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2009
In this paper, several algorithms that allow for quantitative photoacoustic reconstruction of tissue optical, acoustic and physiological properties are described in a finite-element method based framework. These quantitative reconstruction algorithms are compared, and the merits and limitations associated with these methods are discussed ...
Yuan, Zhen, Jiang, Huabei
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Air-Filled Bubbles Stabilized by Gold Nanoparticle/Photodynamic Dye Hybrid Structures for Theranostics

Nanomaterials, 2021
Microbubbles have already reached clinical practice as ultrasound contrast agents for angiography. However, modification of the bubbles’ shell is needed to produce probes for ultrasound and multimodal (fluorescence/photoacoustic) imaging methods in ...
Roman A. Barmin, Polina G. Rudakovskaya, Olga I. Gusliakova, Olga A. Sindeeva, Ekaterina S. Prikhozhdenko, Elizaveta A. Maksimova, Ekaterina N. Obukhova, Vasiliy S. Chernyshev, Boris N. Khlebtsov, Alexander A. Solovev, Gleb B. Sukhorukov, Dmitry A. Gorin   +11 more
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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
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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
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Strain imaging in abdominal aortic aneurysms using bistatic dual-aperture ultrasound

Scientific Reports
Knowledge of the full geometry of abdominal aortic aneurysms (AAA) and local, mechanical wall parameters using ultrasound (US) can contribute to a better assessment of the AAA’s mechanical state, prediction of growth and possible risk of rupture. Such an
Vera H. J. van Hal, Lisanne T. F. Passier, Marc R. H. M. van Sambeek, Hans-Martin Schwab, Richard G. P. Lopata   +4 more
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