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Proceedings Paper

Medical photoacoustic beamforming using minimum variance-based delay multiply and sum
Author(s): Moein Mozaffarzadeh; Ali Mahloojifar; Mahdi Orooji
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Paper Abstract

Delay-and-Sum (DAS) beamformer is the most common beamforming algorithm in Photoacoustic imaging (PAI) due to its simple implementation and real time imaging. However, it provides poor resolution and high levels of sidelobe. A new algorithm named Delay-Multiply-and-Sum (DMAS) was introduced. Using DMAS leads to lower levels of sidelobe compared to DAS, but resolution is not satisfying yet. In this paper, a novel beamformer is introduced based on the combination of Minimum Variance (MV) adaptive beamforming and DMAS, so-called Minimum Variance-Based DMAS (MVB-DMAS). It is shown that expanding the DMAS equation leads to some terms which contain a DAS equation. It is proposed to use MV adaptive beamformer instead of existing DAS inside the DMAS algebra expansion. MVB-DMAS is evaluated numerically compared to DAS, DMAS and MV and Signal-to-noise ratio (SNR) metric is presented. It is shown that MVB-DMAS leads to higher image quality and SNR for about 13 dB, 3 dB and 2 dB in comparison with DAS, DMAS and MV, respectively.

Paper Details

Date Published: 26 June 2017
PDF: 6 pages
Proc. SPIE 10335, Digital Optical Technologies 2017, 1033522 (26 June 2017); doi: 10.1117/12.2269608
Show Author Affiliations
Moein Mozaffarzadeh, Tarbiat Modares Univ. (Iran, Islamic Republic of)
Ali Mahloojifar, Tarbiat Modares Univ. (Iran, Islamic Republic of)
Mahdi Orooji, Tarbiat Modares Univ. (Iran, Islamic Republic of)

Published in SPIE Proceedings Vol. 10335:
Digital Optical Technologies 2017
Bernard C. Kress; Peter Schelkens, Editor(s)

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