منابع مشابه
Non-contact biomedical photoacoustic and ultrasound imaging.
The detection of ultrasound in photoacoustic tomography (PAT) usually relies on ultrasonic transducers in contact with the biological tissue through a coupling medium. This is a major drawback for important potential applications such as surgery. Here we report the use of a remote optical method, derived from industrial laser-ultrasonics, to detect ultrasound in tissues. This approach enables n...
متن کاملUltrasound-modulated Optical Tomography for Biomedical Applications
Ultrasound-modulated Optical Tomography for Biomedical Applications. (August 2004) Jun Li, B.Eng., Huazhong University of Science and Technology; M.Eng., Huazhong University of Science and Technology; Ph.D., Huazhong University of Science and Technology Chair of Advisory Committee: Dr. Lihong V. Wang I experimentally studied ultrasound-modulated optical tomography, which holds the promise for b...
متن کاملNon-Contact Optical Ultrasound Concept for Biomedical Imaging
In this paper, we examine the potential of a fully noncontact-standoff laser-ultrasound concept to generate and measure elastic waves in order to construct internal structure and matrix images within biological tissue. We use a pulsed optical laser (Q-switched) as an excitation source that converts optical energy to ultrasonic waves within a tissue complex via photoacoustic (PA) mechanisms. Las...
متن کاملInterferometric microstructured polymer optical fiber ultrasound sensor for optoacoustic endoscopic imaging in biomedical applications
We report a characterization of the acoustic sensitivity of microstructured polymer optical fiber interferometric sensors at ultrasonic frequencies from 100kHz to 10MHz. The use of wide-band ultrasonic fiber optic sensors in biomedical ultrasonic and optoacoustic applications is an open alternative to conventional piezoelectric transducers. These kind of sensors, made of biocompatible polymers,...
متن کاملSession 1pBB: Biomedical Ultrasound/Bioresponse to Vibration 1pBB9. Cooperative radiation and losses in bubble clusters
In existing models for single bubble dynamics it is necessary to account for radiation damping, a consequence of fluid compressibility. A similar correction is necessary when modeling systems of coupled bubbles. The coupling alters the collective dynamics and therefore the acoustic power radiated. In the linear approximation and for compact clusters in which the bubbles pulsate in phase, the ra...
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ژورنال
عنوان ژورنال: Juntendo Medical Journal
سال: 1990
ISSN: 0022-6769,2188-2134
DOI: 10.14789/pjmj.36.176