Design of Optimal 2-D Nongrid Sparse Arrays for Medical Ultrasound

Journal article

Authors/Editors

Diarra, Bakary

Research Areas

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Publication Details

Author list: Diarra B, Robini M, Tortoli P, Cachard C, Liebgott H

Publisher: Institute of Electrical and Electronics Engineers

Place: PISCATAWAY

Publication year: 2013

Journal: IEEE Transactions on Biomedical Engineering (0018-9294)

Journal acronym: IEEE T BIO-MED ENG

Volume number: 60

Issue number: 11

Start page: 3093

End page: 3102

Number of pages: 10

ISSN: 0018-9294

eISSN: 1558-2531

Languages: English-Great Britain (EN-GB)

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Abstract

Three-dimensional imaging with 2-D matrix probes is one of the most exciting recent ultrasound innovations. Unfortunately, the number of elements of a 2-D matrix probe is often very high, and reducing this number deteriorates the beam properties. In this paper, we propose a new sparse-array design technique with irregular element positioning, which significantly reduces the number of active elements as well as the grating-lobe level. In particular, we introduce a new cost function for optimizing the weighting coefficients of the elements and a new annealing-based algorithm to compute the lowest cost solutions. Numerical simulations show substantial improvements over standard sparse arrays.

Keywords

2-D array, 3-D imaging, simulated annealing, sparse array, ultrasound imaging

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