Linear-array photoacoustic imaging using minimum variance-based delay multiply and sum adaptive beamforming algorithm

In photoacoustic imaging, delay-and-sum (DAS) beamformer is a common beamforming algorithm having a simple implementation. However, it results in a poor resolution and high sidelobes. To address these challenges, a new algorithm namely delay-multiply-and-sum (DMAS) was introduced having lower sidelo...

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Vydáno v:Journal of biomedical optics Ročník 23; číslo 2; s. 1
Hlavní autoři: Mozaffarzadeh, Moein, Mahloojifar, Ali, Orooji, Mahdi, Kratkiewicz, Karl, Adabi, Saba, Nasiriavanaki, Mohammadreza
Médium: Journal Article
Jazyk:angličtina
Vydáno: United States 01.02.2018
Témata:
Adult
Algorithms
Equipment Design
Humans
Image Processing, Computer-Assisted - methods
Male
Phantoms, Imaging
Photoacoustic Techniques - instrumentation
Photoacoustic Techniques - methods
Signal-To-Noise Ratio
Wrist - blood supply
Wrist - diagnostic imaging
linear-array imaging
beamforming
photoacoustic imaging
delay-multiply-and-sum
minimum variance
ISSN:1560-2281, 1560-2281
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Shrnutí:In photoacoustic imaging, delay-and-sum (DAS) beamformer is a common beamforming algorithm having a simple implementation. However, it results in a poor resolution and high sidelobes. To address these challenges, a new algorithm namely delay-multiply-and-sum (DMAS) was introduced having lower sidelobes compared to DAS. To improve the resolution of DMAS, a beamformer is introduced using minimum variance (MV) adaptive beamforming combined with DMAS, so-called minimum variance-based DMAS (MVB-DMAS). It is shown that expanding the DMAS equation results in multiple terms representing a DAS algebra. It is proposed to use the MV adaptive beamformer instead of the existing DAS. MVB-DMAS is evaluated numerically and experimentally. In particular, at the depth of 45 mm MVB-DMAS results in about 31, 18, and 8 dB sidelobes reduction compared to DAS, MV, and DMAS, respectively. The quantitative results of the simulations show that MVB-DMAS leads to improvement in full-width-half-maximum about 96%, 94%, and 45% and signal-to-noise ratio about 89%, 15%, and 35% compared to DAS, DMAS, MV, respectively. In particular, at the depth of 33 mm of the experimental images, MVB-DMAS results in about 20 dB sidelobes reduction in comparison with other beamformers.
Bibliografie:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1560-2281
1560-2281
DOI:10.1117/1.JBO.23.2.026002