Results 91 to 100 of about 26,357 (239)

Photoacoustic imaging in attenuating acoustic media based on strongly causal models

, 2012
In this paper we derive time reversal imaging functionals for two strongly causal acoustic attenuation models, which have been proposed recently. The time reversal techniques are based on recently proposed ideas of Ammari et al for the thermo-viscous ...
Kalimeris, Konstantinos, Scherzer, Otmar
core   +1 more source

Carbon Dots for Cancer Theranostics: Synthesis Strategies, Luminescence Properties, and Advances in Bioimaging‐Guided Diagnosis and Therapy

Chemistry – A European Journal, EarlyView.
Lighting up the path to precision oncology: This review comprehensively summarizes the rational design of carbon dots (CDs), elucidating how core size, surface chemistry, and heteroatom doping dictate their luminescence mechanisms. Special emphasis is placed on engineering NIR‐II emissive CDs for deep‐tissue imaging.
Zekun Yan, Yupeng Liu, Jinyun Tan, Songnan Qu   +3 more
wiley   +1 more source

Advances in Photoacoustic Endoscopic Imaging Technology for Prostate Cancer Detection

Photonics
The rapid progress in biomedical imaging technology has generated considerable interest in new non-invasive photoacoustic endoscopy imaging techniques.
Ningning Wei, Huiting Chen, Bin Li, Xiaojun Dong, Bo Wang   +4 more
doaj   +1 more source

Image Enhancement and Noise Reduction Using Modified Delay-Multiply-and-Sum Beamformer: Application to Medical Photoacoustic Imaging

, 2018
Photoacoustic imaging (PAI) is an emerging biomedical imaging modality capable of providing both high contrast and high resolution of optical and UltraSound (US) imaging.
Mahloojifar, Ali, Mozaffarzadeh, Moein, Orooji, Mahdi   +2 more
core   +1 more source

Tissue oxygenation dynamics during transition from seizure to spreading depolarization in rat brain

Epilepsia, EarlyView.
Abstract Objective Spreading depolarization (SD) is a phenomenon underlying various neurological conditions, including epilepsy. Researchers have suspected that local tissue oxygenation breakdown induces spontaneous SD. In this study, we investigated the relationship between spontaneous epileptic seizures and SD, with a focus on the role of local ...
Jiayang Liu, Bruce J. Gluckman
wiley   +1 more source

Near-infrared multispectral photoacoustic analysis of lipids and intraplaque hemorrhage in human carotid artery atherosclerosis

Photoacoustics
Spectral photoacoustic imaging in combination with unmixing techniques may be applied to retrieve information about high-risk features present in atherosclerotic plaques, possibly providing prognostic insights into future stroke events.
Jonas J.M. Riksen, Sowmiya Chandramoorthi, Antonius F.W. Van der Steen, Gijs Van Soest   +3 more
doaj   +1 more source

A New Sparsification and Reconstruction Strategy for Compressed Sensing Photoacoustic Tomography

, 2017
Compressed sensing (CS) is a promising approach to reduce the number of measurements in photoacoustic tomography (PAT) while preserving high spatial resolution. This allows to increase the measurement speed and to reduce system costs.
Bauer-Marschallinger, Johannes, Berer, Thomas, Burgholzer, Peter, Haltmeier, Markus, Nguyen, Linh, Sandbichler, Michael   +5 more
core   +1 more source

In Situ Acoustic Monitoring of Focused Femtosecond Pulse Duration in Air

Laser &Photonics Reviews, EarlyView.
Air‐breakdown acoustics at the laser focus is used to determine femtosecond pulse duration with a simple USB microphone. By chirp‐tuning and compressing 1030 nm pulses from 241 to 50 fs, the acoustic amplitude scales inversely proportional to the square root of the pulse duration, enabling in situ readout over 50 fs–5 ps—crucial for precise pulse ...
Indrė Meškėlaitė, Hsin‐Hui Huang, Haoran Mu, Nguyen Hoai An Le, Tomas Katkus, Edvinas Aleksandravičius, Gabrielius Kontenis, Domas Paipulas, Saulius Juodkazis, Darius Gailevičius   +9 more
wiley   +1 more source

Photoacoustic Imaging using Combination of Eigenspace-Based Minimum Variance and Delay-Multiply-and-Sum Beamformers: Simulation Study

, 2017
Delay and Sum (DAS), as the most common beamforming algorithm in Photoacoustic Imaging (PAI), having a simple implementation, results in a low-quality image.
Avanji, Seyed Amin Ollah Izadi, Mahloojifar, Ali, Mozaffarzadeh, Moein, Orooji, Mahdi   +3 more
core   +1 more source

The scale matters: A review on stimuli‐responsive microrobots categorized by scale for biomedical applications

Responsive Materials, EarlyView.
We systematically summarize how each scale dictates fundamental choices in design feature, manufacturing technology, driving mechanism, and control strategy, which are inherently governed by scale‐dominated physical principles. Furthermore, the application of scale‐determined operation modes of microrobots across different stages of medical ...
Hang Yin, Yujing Li, Guanghao Wu, Yubing Guo   +3 more
wiley   +1 more source