Results 11 to 20 of about 6,675 (237)
Photoacoustic elastography [PDF]
Optics Letters, 2016 Elastography can noninvasively map the elasticity distribution in biological tissue, which can potentially be used to reveal disease conditions. In this Letter, we have demonstrated photoacoustic elastography by using a linear-array photoacoustic computed tomography system. The feasibility of photoacoustic elastography was first demonstrated by imaging
Hai, Pengfei +4 more
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Optics Letters, 2009 We have developed photoacoustic endoscopy with a miniaturized imaging probe. A light-guiding optical fiber, an ultrasonic sensor, and a mechanical scanning unit are integrated to enable circumferential sector scanning, which produces B-scan images. Biological tissues, including the gastrointestinal tract of a rat, have been imaged ex vivo or in situ.
Yang, Joon-Mo +5 more
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Photoacoustic microscopy [PDF]
Laser & Photonics Reviews, 2013 AbstractPhotoacoustic microscopy (PAM) is a hybridin vivoimaging technique that acoustically detects optical contrast via the photoacoustic effect. Unlike pure optical microscopic techniques, PAM takes advantage of the weak acoustic scattering in tissue and thus breaks through the optical diffusion limit (∼1 mm in soft tissue).
Yao, Junjie, Wang, Lihong V.
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Photoacoustic Cystography [PDF]
Journal of Visualized Experiments, 2013 Conventional pediatric cystography, which is based on diagnostic X-ray using a radio-opaque dye, suffers from the use of harmful ionizing radiation. The risk of bladder cancers in children due to radiation exposure is more significant than many other cancers.
Jeon, M, Kim, J, Kim, C
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Cold Spring Harbor Protocols, 2011 INTRODUCTIONPhotoacoustic imaging, which is based on the photoacoustic effect, has developed extensively over the last decade. Possessing many attractive characteristics such as the use of nonionizing electromagnetic waves, good resolution and contrast, portable instrumention, and the ability to partially quantitate the signal, photoacoustic techniques
Yin, Zhang, Hao, Hong, Weibo, Cai
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Neurovascular photoacoustic tomography [PDF]
Frontiers 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.
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Photoacoustic computed microscopy [PDF]
Scientific Reports, 2014 Photoacoustic microscopy (PAM) is emerging as a powerful technique for imaging microvasculature at depths beyond the ~1 mm depth limit associated with confocal microscopy, two-photon microscopy and optical coherence tomography. PAM, however, is currently qualitative in nature and cannot quantitatively measure important functional parameters including ...
Yao, Lei, Xi, Lei, Jiang, Huabei
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Cells, 2019 One of the greatest challenges in neuro-oncology is diagnosis and therapy (theranostics) of leptomeningeal metastasis (LM), brain metastasis (BM) and brain tumors (BT), which are associated with poor prognosis in patients.
Olga A. Sindeeva +10 more
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Urogenital photoacoustic endoscope [PDF]
Optics Letters, 2014 Photoacoustic (PA) endoscopy for human urogenital imaging has the potential to diagnose many important diseases, such as endometrial and prostate cancers. We have specifically developed a 12.7 mm diameter, rigid, side-scanning PA endoscopic probe for such applications.
Li, Chiye +8 more
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Methodology of Pulsed Photoacoustics and Its Application to Probe Photosystems and Receptors
Sensors, 2010 We review recent advances in the methodology of pulsed time-resolved photoacoustics and its application to studies of photosynthetic reaction centers and membrane receptors such as the G protein-coupled receptor rhodopsin.
Harvey J.M. Hou, Thomas P. Sakmar
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