Results 41 to 50 of about 26,357 (239)

Super-resolution photoacoustic imaging via flow induced absorption fluctuations

, 2017
In deep tissue photoacoustic imaging the spatial resolution is inherently limited by the acoustic wavelength. We present an approach for surpassing the acoustic diffraction limit by exploiting temporal fluctuations in the sample absorption distribution ...
Arnal, Bastien, Bossy, Emmanuel, Chaigne, Thomas, Katz, Ori, Vilov, Sergey   +4 more
core   +3 more sources

Label-free high-throughput photoacoustic tomography of suspected circulating melanoma tumor cells in patients in vivo [PDF]

, 2020
Significance: Detection and characterization of circulating tumor cells (CTCs), a key determinant of metastasis, are critical for determining risk of disease progression, understanding metastatic pathways, and facilitating early clinical intervention.
Cornelius, Lynn A., Hai, Pengfei, Li, Yang, Qu, Yuan, Shmuylovich, Leonid, Wang, Lihong V., Zhu, Liren   +6 more
core   +1 more source

Study on the Photoacoustic Technology to Simultaneous In-Situ Detection of the Cavity Ring-Down Spectrum for Multi-Optical Parameters

IEEE Photonics Journal, 2020
A simultaneous in-situ detection technique to obtain multi-optical parameters was proposed. The same 403.56 nm, low power, blue diode laser was used to conduct the cavity ring-down spectroscopy and photoacoustic spectroscopy, which were coupled.
Hua-Wei Jin, Ren-Zhi Hu, Pin-Hua Xie, Chong-Chong Huang, Feng-Yang Wang, Chuan Lin   +5 more
doaj   +1 more source

Effects of optical attenuation, heat diffusion and acoustic coherence in photoacoustic signals produced by nanoparticles

, 2018
Behavior of the photoacoustic signal produced by nanoparticles as a function of their concentration was studied in detail. As the concentration of nanoparticles is increased in a sample, the peak-to-peak photoacoustic amplitude increases linearly up to a
Alba-Rosales, J. E., Escamilla-Herrera, L. F., Gutiérrez-Juárez, G., Polo-Parada, L., Ramos-Ortiz, G., Reyes-Ramírez, B.   +5 more
core   +1 more source

Laser Engineering of HfN‐Based Nanoparticles for Safe NIR‐I Photothermal and X‐ray Enhancing Cancer Therapies

Advanced Functional Materials, EarlyView.
In this study, we produced HfN‐based nanoparticles via femtosecond laser ablation in acetone. The nanoparticles exhibit a red‐shifted plasmonic resonance in the NIR‐I window, colloidal stability after coating with polyethyleneglycol, and excellent biocompatibility. The photothermal and X‐ray sensitization therapeutic effects were demonstrated for tumor
Julia S. Babkova, Ivan V. Zelepukin, Lyubov V. Gorelik, Anton L. Popov, Andrei I. Pastukhov, Gleb V. Tikhonowski, Maxim S. Savinov, Danil D. Kolmanovich, Nikita A. Pivovarov, Alina Yu. Kapitannikova, Anton A. Popov, Anna S. Sogomonyan, Vsevolod A. Skribitsky, Aziz B. Mirkasymov, Andrei V. Kabashin, Sergey M. Deyev   +15 more
wiley   +1 more source

Small-Size Resonant Photoacoustic Cell of Inclined Geometry for Gas Detection

, 2009
A photoacoustic cell intended for laser detection of trace gases is represented. The cell is adapted so as to enhance the gas-detection performance and, simultaneously, to reduce the cell size.
A. L. Ulasevich, A. Miklos, A. Olafsson, A. V. Gorelik, A.A. Kosterev, A.A. Kosterev, A.K.Y. Ngai, A.V. Gorelik, B.A. Paldus, D. Hofstetter, E. Huang, F. N. Nikonovich, F.G.C. Bijnen, F.J.M. Harren, F.R.E. Gruijl, J. Oomens, L.R. Narasimhan, M. P. Zakharich, M.B. Pushkarsky, M.M.J.W. Herpen van, N. S. Kazak, P. Kestler, R. Flindt, R. Lewicki, R.A. Rooth, R.F. Curl, S. Bernegger, S.L. Firebaugh, V. A. Firago, V. S. Starovoitov, V.P. Zharov, V.S. Starovoitov, V.S. Starovoitov, W. Urban, W.J. Witteman   +34 more
core   +1 more source

Graphics processing unit accelerating compressed sensing photoacoustic computed tomography with total variation [PDF]

, 2020
Photoacoustic computed tomography with compressed sensing (CS-PACT) is a commonly used imaging strategy for sparse-sampling PACT. However, it is very time-consuming because of the iterative process involved in the image reconstruction.
Bai, Yuanyuan, Gao, Mingjie, Liu, Chengbo, Meng, Jing, Si, Guangtao, Wang, Lihong V.   +5 more
core  

Establishing a Model Precursor System: Over a Decade of Research on Carbon Dots from the Citric Acid‐Urea System

Advanced Functional Materials, EarlyView.
The citric acid/urea (CA‐Urea) precursor system offers a versatile, scalable route to carbon dots with tunable luminescence and multifunctionality. Mechanistic insights into precursor chemistry and reaction parameters have enabled doping, surface modification, and hybridization strategies, yielding CDs for luminescent devices, sensing, catalysis ...
Yupeng Liu, Zhiqi Cai, Xiangxin Sun, Hanyi Zhang, Yiming Hao, Jun Wu, Zekun Yan, Xue Wu, Yiqi Liang, Liming Wang, Songnan Qu   +10 more
wiley   +1 more source

In Vivo Photoacoustic Ultrasound (PAUS) Assay for Monitoring Tendon Collagen Compositional Changes during Injury and Healing

Diagnostics
Tendon injury and healing involve significant changes to tissue biology and composition. Current techniques often require animal sacrifice or tissue destruction, limiting assessment of dynamic changes in tendons, including treatment response, disease ...
Joseph B. Newton, Courtney A. Nuss, Stephanie N. Weiss, Rebecca L. Betts, Chandra M. Sehgal, Louis J. Soslowsky   +5 more
doaj   +1 more source

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

Bioengineering, 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, Marzieh Hanafi, John Hummel, John R. Cressman, Rémi Veneziano, Parag V. Chitnis   +5 more
doaj   +1 more source