Results 31 to 40 of about 3,766 (264)

Photoacoustic angiography of the breast [PDF]

Medical Physics, 2010
Purpose:The authors report a noninvasive technique and instrumentation for visualizing vasculature in the breast in three dimensions without using either ionizing radiation or exogenous contrast agents, such as iodine or gadolinium. Vasculature is visualized by virtue of its high hemoglobin content compared to surrounding breast parenchyma.
Robert A, Kruger, Richard B, Lam, Daniel R, Reinecke, Stephen P, Del Rio, Ryan P, Doyle   +4 more
openaire   +2 more sources

49th Winter School on Wave and Quantum Acoustics XLVIIIth Winter School on Environmental Acoustics and Vibroacoustics Szczyrk, Poland, February 24–27, 2020

Archives of Acoustics, 2020
49th Winter School on Wave and Quantum Acoustics constituted platforms for sharing the results and achievements obtained in different branches of physical acoustics, as molecular acoustics, quantum acoustics, acousto-optics, magnetoacoustics ...
Dariusz Bismor
doaj   +1 more source

Urogenital photoacoustic endoscope [PDF]

Optics Letters, 2014
Photoacoustic (PA) endoscopy for human urogenital imaging has the potential to diagnose many important diseases, such as endometrial and prostate cancers. We have specifically developed a 12.7 mm diameter, rigid, side-scanning PA endoscopic probe for such applications.
Li, Chiye, Yang, Joon-Mo, Chen, Ruimin, Yeh, Cheng-Hung, Zhu, Liren, Maslov, Konstantin, Zhou, Qifa, Shung, K. Kirk, Wang, Lihong V.   +8 more
openaire   +3 more sources

Comparison of self-referencing techniques for photothermal detection of trace compounds in water [PDF]

, 2000
Self-referencing techniques are compared for a closed-cell photothermal detector that uses a water meniscus as a pressure sensor. Deflection of the meniscus was measured using an optical fibre Fabry–Perot interferometer.
Johnson, Mark, Jane Hodgkinson, Hodgkinson, J., Hodgkinson, Jane, Johnson, M., Dakin, J.P., Dakin, John P., Mark Johnson, John P Dakin   +8 more
core   +1 more source

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

A semi-anthropomorphic breast phantom with tunable blood oxygenation levels for use in quantitative photoacoustics [PDF]

, 2019
Photoacoustic imaging is an upcoming technique with potential in breast cancer screening and diagnosis. It is able to visualize the breast's vasculature. Its quantitative counterpart, called quantitative photoacoustics, potentially enables the derivation
Manohar, Srirang, Dantuma, Maura, Javier Ortega Julia, Ortega Julia, Javier, Srirang Manohar, Maura Dantuma   +5 more
core   +1 more source

48th Winter School on Wave and Quantum Acoustics XLVIIth Winter School on Environmental Acoustics and Vibroacoustics Szczyrk, Poland, 25.02–01.03.2019

Archives of Acoustics, 2019
48th Winter School on Wave and Quantum Acoustics constituted platforms for sharing the results and achievements obtained in different branches of physical acoustics (e.g.
Winter Schools on Acoustics
doaj   +1 more source

Photothermal detection of trace optical absorption in water by use of visible-light-emitting diodes [PDF]

, 1998
Visible light emitting diodes of three different colors have been used to detect an absorbing compound (potassiumpermanganate) in trace quantities in aqueous solution.
Johnson, Mark, Hodgkinson, Jane, Dakin, John P.   +2 more
core   +1 more source

Photoacoustic Detection of H₂ and NH₃ Using Plasmonic Signal Enhancement in GaN Microcantilevers

Micromachines, 2020
Photoacoustic (PA) detection of H2 and NH3 using plasmonic excitation in Pt- and Pd-decorated GaN piezotransistive microcantilevers were investigated using pulsed 520-nm laser illumination.
Digangana Khan, Hongmei Li, Ferhat Bayram, Durga Gajula, Goutam Koley   +4 more
doaj   +1 more source

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
doaj   +1 more source