HYDROACOUSTICS
ANNUAL JOURNAL |
START | NEW VOL 20 | SEARCH | STATISTICS | PAS - GDANSK DIVISION |
pp. 195-206, vol. 15, 2012 Janusz Wójcik Institute of Fundamental Technological Research, Polish Academy of Sciences, Warsaw, Poland Ihor Trots Institute of Fundamental Technological Research, Polish Academy of Sciences, Warsaw, Poland Marcin Lewandowski Institute of Fundamental Technological Research, Polish Academy of Sciences, Warsaw, Poland Andrzej Nowicki Institute of Fundamental Technological Research, Polish Academy of Sciences, Warsaw, Poland Key words: ultrasound; tissue mimicking Abstract: An analytical model of imaging using synthetic aperture (SA) methods is presented. This model takes into account: fundamental features of an environment, of an electric
transmission/reception path and a description of SA structure - possible schemes of
transmission, reception and image formation. Then two schemes are analyzed: a proposed
cumulative synthetic transmit aperture (CSTA) and for comparison of the standard STA
schemes. For both methods identical basic parameters - equal sequences of transmit and
receive transducers were applied. The distinctive feature of CSTA is gathering (summing up)
echoes of subsequent transmissions in one acquisition matrix sufficient for image
reconstruction. In traditionally applied STA methods a separate acquisition matrix for each
transmission is created. Therefore there are a dozen to several dozen more matrices and the
time of image reconstruction is at least several times longer than in CSTA. The presented
experimental results obtained using wire and tissue mimicking phantoms have shown the
comparable imaging quality in both methods.
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