Journal
JOURNAL OF BIOMEDICAL OPTICS
Volume 9, Issue 6, Pages 1327-1335Publisher
SPIE-INT SOCIETY OPTICAL ENGINEERING
DOI: 10.1117/1.1805556
Keywords
optoacoustic; imaging; cross-correlation; blood vessel; in vivo
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A photoacoustic double-ring sensor, featuring a narrow angular aperture, is developed for laser-induced photoacoustic imaging of blood vessels. An integrated optical fiber enables reflection-mode detection of ultrasonic waves. By using the cross-correlation between the signals detected by the two rings, the angular aperture of the sensor is reduced by a factor of 1.9, from 1.5 to 0.8 deg. Consequently, photoacoustic images could be obtained in a manner analogous to the ultrasound B-scan mode. Next, the cross section of artificial blood vessels is visualized by reconstruction of the absorbed energy distribution. Finally, in vivo imaging and the subsequent reconstruction of the absorbed energy distribution is demonstrated for superficial blood vessels in the human wrist. (C) 2004 Society of Photo-Optical Instrumentation Engineers.
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