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Proceedings Paper

Two-dimensional detection of optoacoustic stress transients
Author(s): Uwe Oberheide; Christoph Lee; Ronald Krebs; Herbert Welling; Wolfgang Ertmer; Holger Lubatschowski
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Paper Abstract

For enhanced optoacoustic imaging in biomedical applications more than one-dimensional detection is required. Tomographic images comparable to ultrasound B-scans can be generated with linear arrays. This work presents a detection scheme for such an array based on piezoelectric films. Each single detector consists of a ring shaped active area with a diameter of less than one millimeter, which leads to a high lateral resolution. Because of the small dimensions of the systems it is suitable for applications with limited accessibility like ophthalmic or endoscopic use. The sensitivity of a single detector is close to 0.5 mV/bar. First measurements on layered tissue phantoms made of gelatine and absorbing films show the potential of such an array for depth profiling as well as for two-dimensional imaging of simple structures.

Paper Details

Date Published: 10 June 2002
PDF: 7 pages
Proc. SPIE 4618, Biomedical Optoacoustics III, (10 June 2002); doi: 10.1117/12.469853
Show Author Affiliations
Uwe Oberheide, Laser Zentrum Hannover e.V. (Germany)
Christoph Lee, Laser Zentrum Hannover e.V. (Germany)
Ronald Krebs, Univ. Hannover (Germany)
Herbert Welling, Laser Zentrum Hannover e.V. (Germany)
Wolfgang Ertmer, Univ. Hannover (Germany)
Holger Lubatschowski, Laser Zentrum Hannover e.V. (Germany)

Published in SPIE Proceedings Vol. 4618:
Biomedical Optoacoustics III
Alexander A. Oraevsky, Editor(s)

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