Results 31 to 40 of about 43,829 (291)

Nondestructive evaluation of ceramic and metallic components by photoacoustic microscopy

open access: yes, 2022
S.408-411In recent years photoacoustic microscopy (PAM) has been developed as a laboratory instrument for the nondestructive examination of surface and sub-surface features of opaque solids.
Arnold, W., Hoffmann, B., Peukert, H.
core   +1 more source

NIR-II Nanoprobes: A Review of Components-Based Approaches to Next-Generation Bioimaging Probes

open access: yesBioengineering, 2023
Fluorescence and photoacoustic imaging techniques offer valuable insights into cell- and tissue-level processes. However, these optical imaging modalities are limited by scattering and absorption in tissue, resulting in the low-depth penetration of ...
Bryce Dunn   +5 more
doaj   +1 more source

In vivo demonstration of reflection artifact reduction in photoacoustic imaging using synthetic aperture photoacoustic-guided focused ultrasound (PAFUSion) [PDF]

open access: yes, 2016
Reflection artifacts caused by acoustic inhomogeneities are a critical problem in epi-mode biomedical photoacoustic imaging. High light fluence beneath the probe results in photoacoustic transients, which propagate into the tissue and reflect back from ...
Steenbergen, Wiendelt   +10 more
core   +2 more sources

Advanced Spectroscopic Studies into the Degradation of Polyester Melamine Coil Coatings before and after Exposure to Natural and Accelerated Weathering Tests [PDF]

open access: yes, 2009
PhDPolymeric coating research requires advanced spectroscopic techniques to perform more efficient and detailed analysis in order to improve knowledge on the component distribution and the degradation of functional groups in the coating.
Zhang, Wanrui
core   +2 more sources

An Automatic Unmixing Approach to Detect Tissue Chromophores from Multispectral Photoacoustic Imaging

open access: yesSensors, 2020
Multispectral photoacoustic imaging has been widely explored as an emerging tool to visualize and quantify tissue chromophores noninvasively. This modality can capture the spectral absorption signature of prominent tissue chromophores, such as oxygenated,
Valeria Grasso   +2 more
doaj   +1 more source

Non-Invasive Monitoring of Human Health by Photoacoustic Spectroscopy

open access: yesSensors, 2022
For certain diseases, the continuous long-term monitoring of the physiological condition is crucial. Therefore, non-invasive monitoring methods have attracted widespread attention in health care.
Yongyong Jin   +4 more
doaj   +1 more source

Eavesdrop at Clinical Depths: Deep Photoacoustic Imaging with Internal Light Illumination

open access: yesAdvanced Devices & Instrumentation
Photoacoustic imaging (PAI) is a hybrid image modality that combines optical absorption contrast and acoustic detection of light-induced ultrasound waves.
Joseph J. Yang, Soon-Woo Cho, Junjie Yao
doaj   +1 more source

Photoacoustic nanoprobe for β-galactosidase activity detection and imaging in vivo [PDF]

open access: yesJournal of Innovative Optical Health Sciences, 2019
Detection and visualization of β-galactosidase (β-gal) is essential to reflect its physiological and pathological effects on human health and disease, but it is still challenging to precisely track β-gal in vivo owing to the limitation of current ...
Qin Zeng, Yunxia Wu, Tao Zhang
doaj   +1 more source

Nonlinear mechanisms in photoacoustics—Powerful tools in photoacoustic imaging

open access: yesPhotoacoustics, 2021
Many nonlinear effects have been discovered and developed in photoacoustic imaging. These nonlinear mechanisms have been explored for different utilizations, such as enhancing imaging contrast, measuring tissue temperature, achieving super-resolution imaging, enabling functional imaging, and extracting important physical parameters. This review aims to
Rongkang Gao   +4 more
openaire   +4 more sources

Neurovascular photoacoustic tomography [PDF]

open access: yesFrontiers in Neuroenergetics, 2010
Neurovascular coupling refers to the relationship between neuronal activities and downstream hemodynamic responses. Photoacoustic tomography (PAT), enabling comprehensive label-free imaging of hemodynamic activities with highly scalable penetration and spatial resolution, has great potential in the study of neurovascular coupling.
Hu, Song, Wang, Lihong V.
openaire   +4 more sources

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