10 June 2002 Two-dimensional detection of optoacoustic stress transients
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Proceedings Volume 4618, Biomedical Optoacoustics III; (2002) https://doi.org/10.1117/12.469853
Event: International Symposium on Biomedical Optics, 2002, San Jose, CA, United States
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.
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Uwe Oberheide, Christoph Lee, Ronald Krebs, Herbert Welling, Wolfgang Ertmer, Holger Lubatschowski, "Two-dimensional detection of optoacoustic stress transients", Proc. SPIE 4618, Biomedical Optoacoustics III, (10 June 2002); doi: 10.1117/12.469853; https://doi.org/10.1117/12.469853

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