Multitone nonlinear coding

• Autorzy: Nowicki A. , Wójcik J. , Secomski W.
• Języki publikacji: EN

Abstrakty

EN

A new method that utilizes nonlinear properties of tissue (or another media) to improve ultrasound image resolution is presented. In our novel method the acoustic source is activated with two tones burst (2.2 and 4.4 MHz) with specially designed polarization of the individual tone burst. This new approach is called multi tone nonlinear coding MNC because the choice of polarization of the both tones (and their amplitudes) allowing optimization of the receiving properties depends on the nonlinear properties of tissue. The calculations were done for two tones bursts propagating in the tissue-like lossy medium with absorption of 7 Np/mźMHz. The concept of the Virtual Fields was introduced to explain abilities and properties of pulse inversion and MNC method and to compare both. Comparison of the spatial field distribution obtained using MNC and conventional harmonic imaging approach, in which the first harmonic is used to reconstruct the image are presented.

Słowa kluczowe

EN

MNC method; virtual fields; acoustic source

• Wydawca: Polskie Towarzystwo Akustyczne. Oddział Gdański
• Czasopismo: Hydroacoustics
• Rocznik: 2008
• Tom: Vol. 11
• Strony: 289--298
• Opis fizyczny: Bibliogr. 10 poz., rys.

Twórcy

autor

Nowicki A.

autor

Wójcik J.

autor

Secomski W.

• Institute of Fundamental Technological Research of Polish Academy of Sciences, Świętokrzyska 21, 00-049 Warsaw, Poland,

Bibliografia

• 1. M.A. Averkiou, D.R. Roundhill, J.E. Powers, A new imaging technique based on the nonlinear properties of tissues, in: Proc. IEEE Ultrason. Symp., Vol. 2, , pp. 1561–1566, 1997.
• 2. M.A. Averkiou, Tissue harmonic ultrasonic imaging, C. R. Acad. Sci., t. 2, Série IV, (Applied physics, Biophysics), 1139–1151, Paris 2001.
• 3. H. Becher, K. Tiemann, C. Pohl, N.C. Nanda, M.A. Averkiou, J.E. Powers, B. Luderitz, Improvement in endocardial border delineation using tissue harmonic imaging, Echocardiography, 15, 511–517, 1998.
• 4. T. Christopher, Experimental investigation of finite amplitude distortion-based second harmonic pulse echo ultrasonic imaging, IEEE Trans. Ultrason., Ferroelect., Freq. Contr., vol. 45, no. 1, pp. 158–162, 1998.
• 5. T. Christopher, Finite amplitude distortion-based inhomogeneous pulse echo ultrasonic imaging, IEEE Trans. Ultrason.Ferroelect., Freq. Contr., vol. 44, no. 1, pp. 125–139, 1997.
• 6. D. Simpson Hope, C.T. Chin, P.N. Burns, Pulse inversion doppler: A new method for detecting nonlinear echoes from microbubble contrast agents, IEEE Trans. Ultrason. Ferr. Freq. Control, 46, 2, 372–382, 1999.
• 7. F. Tranquart, N. Grenier, V. Eder, L. Pourcelot, Clinical use of ultrasound tissue harmonic imaging, Ultrasound Med.Biol., vol. 25, no. 6, pp. 889–894, 1999.
• 8. J. Wójcik, Conservation of energy and absorption in acoustic fields for linear and nonlinear propagation, J.Acoust. Soc. Am., 104(5), 2654-2663, 1998.
• 9. J. Wójcik, Nonlinear reflection and transmission of plane acoustics waves, Archives of Acoustics, Vol.29,No 4, . 607-632, 2004.
• 10. J. Wójcik, A. Nowicki, P.A. Lewin, P.E. Bloomfield, T. Kujawska, L. Filipczynski, Wave Envelopes Method for Description of Nonlinear Acoustic Wave Propagation, Ultrasonics, 44, 3, 310-329, 2006.