Multi-Element Synthetic Transmit Aperture in Medical Ultrasound Imaging

• Autorzy: Trots I. , Nowicki A. , Lewandowski M. , Tasinkevych Y.
• Języki publikacji: EN

Abstrakty

EN

Synthetic aperture (SA) technique is a novel approach to present day commercial systems and has previously not been used in medical ultrasound imaging. The basic idea of SA is to combine information acquired simultaneously from all directions over a number of emissions and to reconstruct the full image from these data. The paper presents the multi-element STA (MSTA) method for medical ultrasound imaging. The main difference with the STA approach is the use of a few elements in the transmit mode in contrast to a single element aperture. This allows increasing the system frame rate, decreasing the number of emissions, and provides the best compromise between the penetration depth and lateral resolution. Besides, a modified MSTA is proposed with a corresponding RF signal correction in the receive mode, which accounts for the element directivity property. In the experiments a 32-element linear transducer array with 0.48 mm interelement spacing and a burst pulse of 100 ns duration were used. Two elements wide transmission aperture was used to generate an ultrasound wave covering the full image region. The comparison of 2D ultrasound images of a tissue mimicking phantom obtained using the STA and MSTA methods is presented to demonstrate the benefits of the second one.

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: 2010
• Tom: Vol. 35, No. 4
• Strony: 687--699
• Opis fizyczny: Bibliogr. 7 poz., rys., wykr.

Twórcy

autor

Trots I.

autor

Nowicki A.

autor

Lewandowski M.

autor

Tasinkevych Y.

• Institute of Fundamental Technological Research Polish Academy of Sciences Pawinskiego 5B, 02-106 Warszawa, Poland,

Bibliografia

• 1. Jensen J.A. (1999), Linear description of ultrasound imaging systems, Notes for the International Summer School on Advanced Ultrasound Imaging, Technical University of Denmark, July 5-9.
• 2. Holm S., Yao H. (1999), Method and apparatus for synthetic transmit aperture imaging, US patent No 5.951.479, September 14.
• 3. Michishita K., Sakagami K., Morimotgo M., Svensson U.P. (2000), Sound radiation from an unbaffled elastic plate strip of infinite length, Applied Acoustics, 61, 1, 45-63.
• 4. Nowicki A., Klimonda Z., Lewandowski M., Litniewski J., Lewin P.A., Trots I. (2007), Direct and post-compressed sound fields for different coded excitation, Acoustical Imaging, 28, 399-407.
• 5. Selfridge A.R., Kino G.S., Khuri-Yakub B.T. (1980), A theory for the radiation pattern of a narrow-strip acoustic transducer, Appl. Phys. Lett., 37, 1, 35-36.
• 6. Tasinkevych Y., Nowicki A., Trots I. (2010), Element directivity influence in the synthetic focusing algorithm for ultrasound imaging, Proceedings of the 57th Open Seminar on Acoustics OSA 2010, pp. 197-200, September 2010, Gliwice, Poland, 2010.
• 7. Trots I., Nowicki A., Lewandowski M. (2009), Synthetic transmit aperture in ultrasound imaging, Archives of Acoustics, 34, 4, 685-695.