Extending penetration depth using coded ultrasonography

• Autorzy: Nowicki A. , Secomski W. , Trots I. , Litniewski J.
• Języki publikacji: EN

Abstrakty

EN

The issue of maximizng penetration depth with concurrent retaining or enhancement of image resolution constitutes one of the time in variant challenges in ultrasound imaging. Concerns about potential and undesirable side effects set limits on the possibility of overcoming the frequency depended attuenuation effects by increasing peak acoustic amplitudes of the waves probing the tissue. To overcome this limitation a pulse compression technique employing 16 bits Complementary Golay Sequences (CGS) Code was implemented at 4 MHz. In comparison with other, erlier proposed excitation schemes, such as chirp, pseudo-random chirp and Barker codes, the CGS allowed virtually side lobe free operation. Experimental data indicate that the quality - resolution, signal penetration and contrast dynamics - of CGS images is better then the one obtain standard ultrasonography using short burst excitation.

Słowa kluczowe

EN

ultrasonography; encoding; ultrasound in medicine

• Wydawca: Polska Akademia Nauk, Wydział IV Nauk Technicznych
• Czasopismo: Bulletin of the Polish Academy of Sciences. Technical Sciences
• Rocznik: 2004
• Tom: Vol. 52, nr 3
• Strony: 215--220
• Opis fizyczny: Bibliogr., 6 poz., 6 rys.

Twórcy

autor

Nowicki A.

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

autor

Secomski W.

autor

Trots I.

autor

Litniewski J.

Bibliografia

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• [2] M. N. Cohen, “Pulse compression in pulse-Doppler radar systems”, in Airborn Pulsed Doppler Radar, eds. G. Morris and L. Harkness, Artech House, Boston, pp. 173–214 (1996).
• [3] B. Haider, P. A. Lewin and K. E. Thomenius, “Pulse elongation and deconvolution filtering for medical ultrasonic imaging”, IEEE Trans. Ultrason. Ferroelectr. Freq. 45, 98–113 (January 1988).
• [4] M. O’Donnell, “Coded excitation system for improving the penetration of real-time phased-array imaging systems”, IEEE Trans. Ultrason. Ferroelectr. Freq. Cont., UFFC-39, 341–351 (May 1992).
• [5] T. X. Misaridis, K. Gammelmark, Ch. H. Jorgensen, N. Lindberg, A. H. Thomsen, M. H. Pedersen and J. A. Jensen, “Potential of coded excitation in medical ultrasound imaging”, Ultrasonics 38, 183–189 (2000).
• [6] M. J. E. Golay, “Complementary serries”, IRE Trans. Inf. Theory IT-7, 82–87 (1961).