Results 51 to 60 of about 11,035 (147)

Avaliação do uso de técnicas FT-IR para caracterização de cobertura polimérica de material energético Evaluation of FT-IR techniques for polymeric coating characterization of energetic material

Polímeros, 2004
Técnicas FT-IR de transmissão, reflexão e fotoacústica (PAS) foram utilizadas para a caracterização da cobertura polimérica do hexahidro-1,3,5-trinitro-1,3,5-triazina (RDX) usando um poliuretano (Estane).
Elizabeth C. Mattos, Rita C. L. Dutra, Milton F. Diniz, Kohun Iha   +3 more
doaj   +1 more source

Photoacoustic microscopy achieved by microcavity synchronous parallel acquisition technique

Optics Express, 2012
We report on a sub-cellular resolution photoacoustic microscopy (PAM) system that employs microcavity synchronous parallel acquisition technique for detecting the weak photoacoustic (PA) signal excited by a modulated continuous wave (CW) laser source. The gas microcavity transducer is developed based on the fact that the bulk modulus of the gas is far ...
Zhiliang, Tan, Yanfei, Liao, Yongbo, Wu, Zhilie, Tang, Ruikang K, Wang   +4 more
openaire   +2 more sources

Review of Low-Cost Photoacoustic Sensing and Imaging Based on Laser Diode and Light-Emitting Diode

Sensors, 2018
Photoacoustic tomography (PAT), a promising medical imaging method that combines optical and ultrasound techniques, has been developing for decades mostly in preclinical application.
Hongtao Zhong, Tingyang Duan, Hengrong Lan, Meng Zhou, Fei Gao   +4 more
doaj   +1 more source

Sound speed resolved by photoacoustic technique

, 2007
"In this work a new method for measuring the speed of sound in materials is reported. This method uses the photoacoustic effect, which is the generation of sound waves by pulsed optical radiation incident on a material sample. The sound waves generated on the surface of the sample travel through the material and are detected with two piezoelectric ...
S.J. Pérez Ruíz, S. Alcántara Iniesta, P.R. Hernández, R. Castañeda-Guzmán   +3 more
openaire   +1 more source

Review of the Fundamental Measurement Modalities in Photoacoustic Mechanical Imaging

Photonics
Photoacoustic (PA) imaging is a non-invasive imaging technique with high optical resolution and acoustic penetration depth, which has been widely used in medical and clinical researches.
Xiaohan Shi, Jianqin Sun, Hua Yuan, Liming Li, Haiyang Zhang, Yue Zhao   +5 more
doaj   +1 more source

Nanophotonic-enhanced photoacoustic imaging for brain tumor detection

Journal of Nanobiotechnology
Photoacoustic brain imaging (PABI) has emerged as a promising biomedical imaging modality, combining high contrast of optical imaging with deep tissue penetration of ultrasound imaging.
Ali Rizwan, Badrinathan Sridharan, Jin Hyeong Park, Daehun Kim, Jean-Claude Vial, Kwangseuk Kyhm, Hae Gyun Lim   +6 more
doaj   +1 more source

A multiscale framework for in silico thrombus generation and photoacoustic simulations

JPhys Photonics
Thrombus composition and microstructure play a critical role in determining the treatment success for thrombus-related diseases such as ischemic stroke and deep vein thrombosis.
Hamed Ghodsi, Sara Cardona, Behrooz Fereidoonnezhad, Sophinese Iskander-Rizk   +3 more
doaj   +1 more source

Ultra-highly sensitive dual gases detection based on photoacoustic spectroscopy by exploiting a long-wave, high-power, wide-tunable, single-longitudinal-mode solid-state laser

Light: Science & Applications
Photoacoustic spectroscopy (PAS) as a highly sensitive and selective trace gas detection technique has extremely broad application in many fields. However, the laser sources currently used in PAS limit the sensing performance. Compared to diode laser and
Shunda Qiao, Ying He, Haiyue Sun, Pietro Patimisco, Angelo Sampaolo, Vincenzo Spagnolo, Yufei Ma   +6 more
doaj   +1 more source

Photoacoustic Resonators for Non-Invasive Blood Glucose Detection Through Photoacoustic Spectroscopy: A Systematic Review

Sensors
Diabetes mellitus is a prevalent disease with a rapidly increasing incidence projected worldwide, affecting both industrialized and developing regions.
Md Rejvi Kaysir, Thasin Mohammad Zaman, Shazzad Rassel, Jishen Wang, Dayan Ban   +4 more
doaj   +1 more source

Resonance frequency measurement to identify stiffness variations based on photoacoustic imaging

Biophysics and Physicobiology
Linear assumption on the level of stiffness in a tissue shows a significant correlation with disease. Photoacoustic imaging techniques that are non-contact by design have been developed in this study to detect differences in phantom (soft tissue ...
Ananta Kusuma Yoga Pratama, Andreas Setiawan, Rini Widyaningrum, Mitrayana   +3 more
doaj   +1 more source