Results 21 to 30 of about 13,377,581 (358)
Towards quantitative tissue absorption imaging by combining photoacoustics and acousto-optics [PDF]
, 2012 We propose a strategy for quantitative photoacoustic mapping of chromophore concentrations that can be performed purely experimentally. We exploit the possibility of acousto-optic modulation using focused ultrasound, and the principle that photons follow
A. Hussain +23 more
core +15 more sources
Photoacoustic needle improves needle tip visibility during deep peripheral nerve block
Scientific Reports, 2021 We developed a novel technology using the photoacoustic effect that improve needle tip visibility. We evaluated whether this technology improves needle tip visibility when performing a deep peripheral nerve block in a cadaver model.
Kunitaro Watanabe +7 more
doaj +1 more source
Indocyanine green loaded graphene oxide for high-efficient photoacoustic tumor therapy [PDF]
Journal of Innovative Optical Health Sciences, 2016 Photoacoustic therapy, using the photoacoustic effect of agents for selectively killing tumor cells, has shown promising for treating tumor. Utilization of high optical absorption probes can help to effectively improve the photoacoustic therapy ...
Baoyun Yan, Huan Qin
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Biosensors, 2022 The photoacoustic (PA) effect occurs when sound waves are generated by light according to the thermodynamic and optical properties of the materials; they are absorption spectroscopic techniques that can be applied to characterize materials that absorb ...
Unsang Jung, Jaemyung Ryu, Hojong Choi
doaj +1 more source
Applied Sciences, 2022 Materials such as silicon, copper, gold, and aluminum exhibit strong absorption and scattering characterization under short-pulsed laser irradiation.
Zhiying Xia +8 more
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Generalized theory of the photoacoustic effect [PDF]
Journal of Applied Physics, 1976 The theory of the photoacoustic effect is extended to include the contribution of mechanical vibration of the sample. Coupled equations for thermal and acoustic waves are solved in both sample and gas. It is shown that the pressure signal in the gas may be significantly affected by acoustic coupling in the sample, and experimental confirmation of this ...
Grover C. Wetsel, F. Alan McDonald
openaire +2 more sources
, 2022 Photoacoustic effect refers to the acoustic generation induced by laser irradiation, where nanosecond pulsed laser source is normally used to provide instantaneous heating and thermoelastic expansion of the sample. More generally, photoacoustic generation requires active intensity modulation of laser source to produce sharp temperature gradient, which ...
Wang, Yiyun +4 more
openaire +2 more sources
Saturation effect in functional photoacoustic imaging [PDF]
Journal of Biomedical Optics, 2010 We investigate the saturation effect, which describes the violation of the linearity between the measured photoacoustic amplitude and the object's optical absorption coefficient in functional photoacoustic imaging when the optical absorption in the object increases.
Wang, Jing +7 more
openaire +5 more sources
Photoacoustic effect invokes auditory response in infrared neuron stimulation [PDF]
Journal of Innovative Optical Health Sciences, 2019 Infrared neuron stimulation is regarded as an innovative approach for stimulating cochleae in animals while the exact mechanism still remains unknown.
Muqun Yang, Tian Guan, Yonghong He
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Understanding the near-field photoacoustic spatiotemporal profile from nanostructures
Photoacoustics, 2022 Understanding the mechanism of photoacoustic generation at the nanoscale is key to developing more efficient photoacoustic devices and agents. Unlike the far-field photoacoustic effect that has been well employed in imaging, the near-field profile leads ...
Hanwei Wang, Yun-Sheng Chen, Yang Zhao
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