Synthetic Transmit Aperture in Ultrasound Imaging

• Autorzy: Trots I. , Nowicki A. , Lewandowski M.
• Języki publikacji: PL

Abstrakty

EN

The paper describes the use of synthetic transmit aperture (STA) imaging in medical ultrasound. The synthetic aperture (SA) imaging is a novel approach to today’s commercial systems. In these systems the image is acquired sequentially one image line at a time that puts a strict limit on the frame rate and the possibility of acquiring a sufficient amount of data for high image quality. This limitation can be lifted by employing SA imaging where the data are acquired simultaneously from all directions over a number of emissions, and the full image can be reconstructed from those data. Due to the complete data set, it is possible to have full transmitting and receiving focusing at the entire image region to improve the contrast dynamic and spatial resolution. The paper describes the STA imaging with a single element transmitting and all elements receiving apertures. In experiments, 32-element linear transducer array with 0.48 mm inter-element spacing and a burst pulse of 100 ns duration were used. The single element transmission aperture was used to generate a spherical wave covering the full image region. The 2D ultrasound images of wire phantom are presented to demonstrate the benefits of SA imaging.

Słowa kluczowe

EN

ultrasound imaging; synthetic aperture; beamforming

• Wydawca: Instytut Podstawowych Problemów Techniki PAN ; Komitet Akustyki PAN ; Polskie Towarzystwo Akustyczne
• Czasopismo: Archives of Acoustics
• Rocznik: 2009
• Tom: Vol. 34, No. 4
• Strony: 685--695
• Opis fizyczny: Bibliogr. 6 poz., wykr.

Twórcy

autor

Trots I.

autor

Nowicki A.

autor

Lewandowski M.

Bibliografia

• [1] Jensen J.A., Nikolov S.I., Gammelmark K.L., Pedersen M.H., Synthetic aperture ultrasound imaging, Ultrasonics, 44, Suppl., e5-e15 (2006).
• [2] Klimonda Z., Lewandowski M., Nowicki A., Trots I., Direct and post-compressed sound fields for different coded excitations - experimental results, Archives of Acoustics, 30, 4, 507-514 (2005).
• [3] Nowicki A., Klimonda Z., Lewandowski M., Litniewski J., Lewin, P.A., Trots I., Comparison of sound fields generated by different coded excitations - Experimental results, Ultrasonics, 44, (1), 121-129 (2006).
• [4] Nowicki A., Trots I., Lewin P.A., Secomski W., Tymkiewicz R., Influence of the ultrasound transducer bandwidth on selection of the complementary Golay bit code length, Ultrasonics, 47, 64-73 (2007).
• [5] Passman C., Ermert H., A 100 Mhz ultrasound imaging system for dermatologic and ophthalmologic diagnostics, IEEE Trans. Ultrason. Ferroelec. Freq. Contr., 43, 4, 545-552 (1996).
• [6] Trots I., Nowicki A., Secomski W., Litniewski J., Golay sequences - side-lobe - canceling codes for ultrasonography, Archives of Acoustics, 29, 1, 87-97 (2004).