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Proceedings Paper

Ring detector arrays for large depth of field scanning photoacoustic macroscopy
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Paper Abstract

Several annular detector arrays are compared for scanning photoacoustic imaging. Compared to single, spherically focused detectors, the arrays offer similar sensitivity, but have an extended depth of field due to their dynamic focusing capability. The investigated arrays consist either of piezoelectric polymer film (PVDF) with a large sensing area for optimized sensitivity or of fiber optic rings, where the small width of elements gives rise to high bandwidth and resolution. Simulations demonstrate the superior resolution of the fiber-optic rings over a flat piezo array. However, with inclined sensing elements also the piezo-detector reaches a similar resolution as the optical array. In phantom experiments with the PVDF array the extended depth of field and the capability of imaging complex objects are demonstrated.

Paper Details

Date Published: 19 February 2018
PDF: 6 pages
Proc. SPIE 10494, Photons Plus Ultrasound: Imaging and Sensing 2018, 104943Q (19 February 2018); doi: 10.1117/12.2292051
Show Author Affiliations
Guenther Paltauf, Karl-Franzens-Univ. Graz (Austria)
Paul Torke, Karl-Franzens-Univ. Graz (Austria)
Robert Nuster, Karl-Franzens-Univ. Graz (Austria)
Johannes Bauer-Marschallinger, Research Ctr. for Non Destructive Testing GmbH (Austria)
Thomas Berer, Research Ctr. for Non Destructive Testing GmbH (Austria)
Gerhard Haudum, Radiologie West (Austria)
Peter Burgholzer, Research Ctr. for Non Destructive Testing GmbH (Austria)

Published in SPIE Proceedings Vol. 10494:
Photons Plus Ultrasound: Imaging and Sensing 2018
Alexander A. Oraevsky; Lihong V. Wang, Editor(s)

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