Abstract
The paper presents the preliminary results of the computer simulations of the synthetic aperture method combined with the coded transmission in a linear transducer array. It exploits the transmission of long waveforms characterized by a particular autocorrelation function and allows to increase the total energy of the transmitted signal by its extension, without increasing the peak pressure (limited by safety reasons). It can also improve signal-to-noise ratio and increase the visualization depth maintaining the ultrasound image resolution.
In the computer simulations the 128-element linear transducer array with 0.48 mm inter-element spacing and the 8 and 16-bits Golay sequences as transmission coded signals were used. For comparison a short burst pulse of the half-sine form was also used. The wire phantom with attenuation of 0.5 dB/[MHz × cm] comprised of several groups of reflectors at different depths was applied. Single element transmission aperture was used to generate a spherical wave covering the full image region and all the elements receive the echo signals. The comparison of 2D ultrasound images of wire phantom is presented to demonstrate the benefits of coded transmission. The visualization was performed using earlier developed synthetic transmit aperture (STA) algorithm with transmit and receive signals correction based on a single element directivity function implemented into the standard STA algorithm.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Nowicki, A., Secomski, W., Litniewski, J., Trots, I.: On the application of signal compression using Golay’s codes sequences in ultrasound diagnostic. Arch. Acoust. 28(4), 313–324 (2003)
Klimonda, Z., Lewandowski, M., Nowicki, A., Trots, I.: Direct and post-compressed sound fields for different coded excitations – experimental results. Arch. Acoust. 30(4), 507–514 (2005)
Selfridge, A.R., Kino, G.S., Khuri-Yakub, B.T.: A theory for the radiation pattern of a narrow-strip acoustic transducer. Appl. Phys. Lett. 37(1), 35–36 (1980)
Jensen, J.A.: Field: a program for simulating ultrasound systems. Paper presented at the 10th Nordic-Baltic conference on Biomedical Imaging Published in Medical & Biological Engineering & Computing. 34(Suppl. 1, Part 1), 351–353 (1996)
Jensen, J.A., Nikolov, S.I., Gammelmark, K. L., Pedersen, M.H.: Synthetic aperture ultrasound imaging. Ultrasonics 44, e5–e15, (2006)
Trahey, G.E., Nock, L.F.: Synthetic receive aperture imaging with phase correction for motion and for tissue ihomogeneities – part I: basic principles. IEEE Trans. Ultrason. Ferroelectr. Freq. Control 39(4), 489–495 (1992)
Nikolov, S.I.: Synthetic aperture tissue and flow ultrasound imaging. PhD thesis, Technical University of Denmark (2001)
Tasinkevych, Y., Nowicki, A., Trots, I.: Element directivity influence in the synthetic focusing algorithm for ultrasound imaging. In Proceedings of the 57th Open Seminar on Acoustics (OSA 2010), pp. 197–200, Gliwice (2010)
Golay, M.J.E.: Complementary series. IRE Trans. Inform. Theory IT-7, 82–87 (1961)
Golay, M.J.E.: Multislit spectrometry. J. Opt. Soc. Am. 39, 437–444 (1949)
Trots, I., Nowicki, A., Secomski, W., Litniewski, J.: Golay sequences – side-lobe canceling codes for ultrasonography. Arch. Acoust. 29(1), 87–97 (2004)
Nowicki, A., Klimonda, Z., Lewandowski, M., Litniewski, J., Lewin, P.A., Trots, I.: Direct and post-compressed sound fields for different coded excitation. Acoust. Imaging 28(5), 399–407 (2007)
Acknowledgments
This work was supported by the Polish Ministry of Science and Higher Education (Grant NN518382137).
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2012 Springer Science+Business Media B.V.
About this paper
Cite this paper
Trots, I., Tasinkevych, Y., Nowicki, A. (2012). Coded Excitation with Directivity Correction in Synthetic Aperture Imaging System. In: Nowicki, A., Litniewski, J., Kujawska, T. (eds) Acoustical Imaging. Acoustical Imaging, vol 31. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-2619-2_16
Download citation
DOI: https://doi.org/10.1007/978-94-007-2619-2_16
Published:
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-007-2618-5
Online ISBN: 978-94-007-2619-2
eBook Packages: Physics and AstronomyPhysics and Astronomy (R0)