Results 11 to 20 of about 3,766 (264)
Photoacoustics with coherent light
Photoacoustics, 2016 Since its introduction in the mid-nineties, photoacoustic imaging of biological tissue has been one of the fastest growing biomedical imaging modality, and its basic principles are now considered as well established.
Emmanuel Bossy, Sylvain Gigan
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Photoacoustics: a historical review [PDF]
Advances in Optics and Photonics, 2016 We review the history of photoacoustics from the discovery in 1880 that modulated light produces acoustic waves to the current time, when the pulsed variant of the discovery is fast developing into a powerful biomedical imaging modality. We trace the meandering and fascinating passage of the effect along several conceptual and methodological ...
Manohar, Srirang, Razansky, Daniel
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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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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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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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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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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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Photoacoustics in a snap [PDF]
Nature Methods, 2020 Photoacoustic topography through an ergodic relay increases imaging throughput and opens a path toward wearable devices.
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Characterization of reference standards for dirt by Laser Ablation Induced Photoacoustics (LAIP) [PDF]
, 2021 Measurements of surface cleanliness and dirt characterization are important problems in a wide range of processes in industry and production. Standard methods are in most cases cumbersome laboratory procedures that must be performed out of the production
Morel, E. N. +4 more
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Fiber endface photoacoustic generator for quantitative photoacoustic tomography
Optics Letters, 2021 We demonstrate a novel fiber endface photoacoustic (PA) generator using infrared (IR) 144 laser dye dispersed within an ultraviolet adhesive. The generator provides a wide acoustic bandwidth in the transducer frequency range of 2–7 MHz, high thermal conversion efficiency ( > 90 % ), good PA signal controllability (well ...
Guang Yang +6 more
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