Results 61 to 70 of about 13,377,581 (358)

Adaptive polarization photoacoustic computed tomography for biological anisotropic tissue imaging

open access: yesPhotoacoustics, 2023
Most photoacoustic computed tomography (PACT) systems usually ignore the anisotropy of the tissue absorption coefficient, which will lead to the lack of information in reconstructed images.
Yang Zhang   +8 more
doaj   +1 more source

Discrete Imaging Models for Three-Dimensional Optoacoustic Tomography using Radially Symmetric Expansion Functions [PDF]

open access: yes, 2014
Optoacoustic tomography (OAT), also known as photoacoustic tomography, is an emerging computed biomedical imaging modality that exploits optical contrast and ultrasonic detection principles.
Er Oraevsky   +5 more
core   +1 more source

Real-time delay-multiply-and-sum beamforming with coherence factor for in vivo clinical photoacoustic imaging of humans [PDF]

open access: yes, 2019
In the clinical photoacoustic (PA) imaging, ultrasound (US) array transducers are typically used to provide B-mode images in real-time. To form a B-mode image, delay-and-sum (DAS) beamforming algorithm is the most commonly used algorithm because of its ...
Choi, Wonseok   +5 more
core   +1 more source

Photoacoustic Tomography in a Rectangular Reflecting Cavity [PDF]

open access: yes, 2013
Almost all known image reconstruction algorithms for photoacoustic and thermoacoustic tomography assume that the acoustic waves leave the region of interest after a finite time.
Cox, B. T., Holman, B., Kunyansky, L.
core   +2 more sources

Investigation of the Effect of the Skull in Transcranial Photoacoustic Imaging: A Preliminary Ex Vivo Study

open access: yesItalian National Conference on Sensors, 2020
Although transcranial photoacoustic imaging (TCPAI) has been used in small animal brain imaging, in animals with thicker skull bones or in humans both light illumination and ultrasound propagation paths are affected.
Rayyan Manwar   +2 more
semanticscholar   +1 more source

Metal Nanoclusters for Cancer Imaging and Treatment

open access: yesAdvanced Functional Materials, EarlyView.
This review aims to provide a comprehensive summary and discussion of the core–shell design capabilities of metal nanoclusters (NCs) at the atomic level for cancer imaging and treatment. It offers essential insights into the design principles of metal NCs while also encouraging the exploration of other nanomaterials and their potential theranostic ...
Haiguang Zhu   +5 more
wiley   +1 more source

Gasotransmitters in Modern Medicine: Promises and Challenges in the Use of Porous Crystalline Carriers

open access: yesAdvanced Healthcare Materials, EarlyView.
This perspective provides an overview of the growing interest in utilizing various gasotransmitters—small gaseous signaling molecules namely nitric oxide (NO), carbon monoxide (CO), and hydrogen sulfide (H2S)—for several therapeutic applications, with emphasis on the potential use of porous materials as carriers to provide safe and controlled local ...
Rosana V. Pinto   +2 more
wiley   +1 more source

Photoacoustic detection of stimulated emission pumping in p-difluorobenzene [PDF]

open access: yes, 1984
Photoacoustic detection has been used to monitor a stimulated emission pumping process in p‐difluorobenzene. Using the Ã^(1)B_(2u)5^1 state as an intermediate, several vibrational levels of the ground electronic state were populated.
Kuppermann, A.   +2 more
core  

Improving Photoacoustic-guided Focusing in Scattering Media by Spectrally Filtered Detection

open access: yes, 2013
We experimentally and numerically study the potential of photoacoustic-guiding for light focusing through scattering samples via wavefront-shaping and iterative optimization.
Boccara, Claude   +5 more
core   +2 more sources

Micro-Doppler Photoacoustic Effect and Sensing by Ultrasound Radar [PDF]

open access: yesIEEE Journal of Selected Topics in Quantum Electronics, 2014
In recent years, photoacoustics have been studied for both anatomical and functional biomedical imaging. However, the physical interaction between photoacoustic-generated endogenous waves and an exogenously applied ultrasound wave is a largely unexplored
Fei Gao, Xiaohua Feng, Yuanjin Zheng
semanticscholar   +1 more source

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