Abstract
Traditional Doppler methods only measure the axial component of the velocity vector. The lack of information on the beam-to-flow (Doppler) angle creates an ambiguity which can lead to large errors in velocity magnitude estimates. An original approach was recently introduced, in which two ultrasound beams with known relative orientation are directed towards the same vessel, one being committed to perform a Doppler measurement, while the second beam has the specific task of detecting the beam-to-flow angle. In this paper, an angle-tracking procedure allowing the Doppler angle to be automatically determined with high accuracy is presented. The procedure is based on the real-time estimation of suitable Doppler spectrum parameters obtained from an M-line associated to a sub-aperture of a linear array probe. Such parameters are used to steer the M-line towards a direction corresponding to a desired beam-flow angle. Knowledge of this angle is finally exploited to obtain the velocity magnitude through the classic Doppler equation related to the second beam. The implementation of the method on a new ultrasound machine and its validation through in vitro and in vivo tests are reported.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Dunmire, B., Beach, K.W., Labs, K.H., Plett, M., Strandness, D.E.: Cross-beam vector Doppler ultrasound for angle-independent velocity measurements. Ultrasound Med. Biol. 26(8), 1213–1235 (2000)
Tortoli, P., Bambi, G., Ricci, S.: Accurate Doppler angle estimation for vector flow measurements. IEEE Trans. Ultrason. Ferroelect. Freq. Contr. 53(8), 1425–1431 (2006)
Bassi, L., Boni, E., Dallai, A., Guidi, F., Ricci, S., Tortoli, P.: ULA-OP: A novel ULtrasound Advanced Open Platform for experimental research, 2007 IEEE Ultrasonics Symposium Proceed., 632–635, New York, (2007)
Tortoli, P., Guidi, G., Pignoli, P.: Transverse Doppler spectral analysis for a correct interpretation of flow sonograms. Ultrasound Med. Biol. 19(2), 115–121 (1993)
Ricci, S., Bassi, L., Cellai, A., Guidi, F., Tortoli, P.: ULA-OP: A fully open ultrasound imaging/Doppler system, Proceedings of the 30th International Symposium on Acoustical Imaging, Monterey, 1–3 March 2009
Acknowledgments
The authors wish to thank all the staff of the Microelectronic Systems Design Laboratory, and in particular Stefano Ricci and Luca Bassi, for their great contribution to this work.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2011 Springer Science+Business Media B.V.
About this paper
Cite this paper
Dallai, A., Boni, E., Francalanci, L., Tortoli, P. (2011). Vector Doppler Method Based on an Automatic Transverse Angle Tracking Procedure. In: André, M., Jones, J., Lee, H. (eds) Acoustical Imaging. Acoustical Imaging, vol 30. Springer, Dordrecht. https://doi.org/10.1007/978-90-481-3255-3_5
Download citation
DOI: https://doi.org/10.1007/978-90-481-3255-3_5
Published:
Publisher Name: Springer, Dordrecht
Print ISBN: 978-90-481-3254-6
Online ISBN: 978-90-481-3255-3
eBook Packages: Physics and AstronomyPhysics and Astronomy (R0)