Results 41 to 50 of about 6,675 (237)
Inverse Diffusion Theory of Photoacoustics
, 2009 This paper analyzes the reconstruction of diffusion and absorption parameters in an elliptic equation from knowledge of internal data. In the application of photo-acoustics, the internal data are the amount of thermal energy deposited by high frequency ...
Ammari H +14 more
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On the Adjoint Operator in Photoacoustic Tomography [PDF]
, 2016 Photoacoustic Tomography (PAT) is an emerging biomedical "imaging from coupled physics" technique, in which the image contrast is due to optical absorption, but the information is carried to the surface of the tissue as ultrasound pulses. Many algorithms
Arridge, Simon R. +4 more
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Acta AcusticaViscothermal 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 +3 more
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Photoacoustic tomography and sensing in biomedicine [PDF]
, 2009 Photoacoustics has been broadly studied in biomedicine, for both human and small animal tissues. Photoacoustics uniquely combines the absorption contrast of light or radio frequency waves with ultrasound resolution.
Li, Changhui, Wang, Lihong V.
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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 +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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A Direct Method for Photoacoustic Tomography with Inhomogeneous Sound Speed [PDF]
, 2015 The standard approach for photoacoustic imaging with variable speed of sound is time reversal, which consists in solving a well-posed final-boundary value problem for the wave equation backwards in time.
Belhachmi, Zakaria +2 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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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 +11 more
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Strain imaging in abdominal aortic aneurysms using bistatic dual-aperture ultrasound
Scientific ReportsKnowledge 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 +4 more
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