NDLI: Adaptive receive and transmit apodization for synthetic aperture ultrasound imaging

Content Provider	IEEE Xplore Digital Library
Author	Holfort, I.K. Austeng, A. Synnevg, J.-F. Holm, S. Gran, F. Jensen, J.A.
Copyright Year	2009
Description	Author affiliation: Department of Informatics, University of Oslo, P. O. Box 1080, N-0316, Norway (Austeng, A.; Synnevg, J.-F.; Holm, S.) \|\| Department of Electrical Engineering, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark (Holfort, I.K.; Gran, F.; Jensen, J.A.)
Abstract	This paper suggests a framework for utilizing adaptive, data-dependent apodization weights on both the receiving and transmitting aperture for Synthetic Aperture (SA) ultrasound imaging. The suggested approach is based on the Minimum Variance (MV) beamformer and consists of two steps. A set of uniquely designed receive apodization weights are applied to pre-summed element data forming a set of adaptively weighted images; these are in SA literature conventionally referred to as low-resolution images. The adaptive transmit apodization is obtained by applying MV across the full set of single emission images before summation. The method is investigated using simulated SA ultrasound data obtained using Field II. Data of 13 point targets distributed at depths from 40 mm to 70 mm, and a 5.5 MHz, 64-element linear array transducer have been used. The investigation has shown that the introduction of adaptive apodization weights on the transmitting aperture provides a main-lobe reduction (estimated at −30 dB) by a factor of 1.8 compared to the method using adaptive apodization weights on the receiving aperture only.
Starting Page	1
Ending Page	4
File Size	247918
Page Count	4
File Format	PDF
ISBN	9781424443895
ISSN	19485727
DOI	10.1109/ULTSYM.2009.5442035
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-09-20
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Ultrasonic imaging Apertures Image resolution Array signal processing Informatics Ultrasonic transducer arrays Ultrasonic transducers Delay Signal resolution Image sensors
Content Type	Text
Resource Type	Article

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