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Proceedings Paper

Point spread function of array transducers in 2D optoacoustic tomography
Author(s): Ivan M. Pelivanov; Varvara A. Simonova; Tatiana D. Khokhlova; Alexander A. Karabutov
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Paper Abstract

In this work the spatial resolution provided by the array transducers in 2D optoacoustic (OA) imaging is considered numerically. The resolution is determined from the point spread function (PSF) of an array, that is a 2D OA image of a point source of the spherical acoustic wave. Numerical simulations consisted of the following steps. First, the OA signals excited by the point source and detected by each element of the array calculated using the Rayleigh integral. Radial backprojection algorithm was then employed to obtain the image of the point source in the imaging plane. The influence of the geometrical parameters of array elements, number of the detectors and a single detector bandwidth on the PSF was studied in detail. It was shown that the spatial resolution provided by the array transducer in the imaging plane can be unambiguously determined from the detector frequency band, array aperture angle and the width of a single array detector, and does not depend on the number of the detectors.

Paper Details

Date Published: 2 March 2010
PDF: 12 pages
Proc. SPIE 7564, Photons Plus Ultrasound: Imaging and Sensing 2010, 756428 (2 March 2010); doi: 10.1117/12.847004
Show Author Affiliations
Ivan M. Pelivanov, Lomonosov Moscow State Univ. (Russian Federation)
Varvara A. Simonova, Institute of Laser and Information Technologies (Russian Federation)
Tatiana D. Khokhlova, Univ. of Washington (United States)
Alexander A. Karabutov, Lomonosov Moscow State Univ. (Russian Federation)


Published in SPIE Proceedings Vol. 7564:
Photons Plus Ultrasound: Imaging and Sensing 2010
Alexander A. Oraevsky; Lihong V. Wang, Editor(s)

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