TY - JOUR
T1 - Approach to 3-D ultrasound high resolution imaging for mechanically moving large-aperture transducer based upon Fourier transform
AU - Benenson, Zalman M.
AU - Elizarov, Alexey B.
AU - Yakovleva, Tatiana V.
AU - O'Brien, William D.
N1 - Funding Information:
Manuscript received January 31, 2002; accepted August 5, 2002. This work was partially supported by grant RP2-2104 from the U.S. Civilian Research and Development Foundation and by grant N99-01-01171 from the Russian Foundation of Basic Research (RFBR).
PY - 2002/12
Y1 - 2002/12
N2 - A new three-dimensional (3-D) acoustic image formation technique is proposed that is based on the transmission of wide bandwidth pulse signals and the application of the 3-D fast Fourier transform. A solution to the Helmholz wave equation has been obtained using the Born approximation. The solution contains analytical expressions for the spatial spectra of the transmit and receive radiation patterns for transducers of various geometries with lenses of fixed focal distances. It has been shown that the proposed algorithms allow for radiation patterns with constant widths at depths both behind and in front of the focal point, starting practically from the plane of the transducer. The theoretical and experimental investigations and computer simulation for both spherical and rectangular transducer shapes have been performed. The results were used to estimate the beamwidths and the side lobe levels. A variant of the linear array has been studied for cylindrical lens of a fixed focal distance moving in a lateral direction. It has been shown that, in this case, a high resolution (of the order of a few wavelengths) can be achieved along all three Cartesian coordinates at a very high scanning velocity. The influence of the moving scatterers' velocity in inhomogeneous medium on the spatial radiation pattern characteristics has been estimated.
AB - A new three-dimensional (3-D) acoustic image formation technique is proposed that is based on the transmission of wide bandwidth pulse signals and the application of the 3-D fast Fourier transform. A solution to the Helmholz wave equation has been obtained using the Born approximation. The solution contains analytical expressions for the spatial spectra of the transmit and receive radiation patterns for transducers of various geometries with lenses of fixed focal distances. It has been shown that the proposed algorithms allow for radiation patterns with constant widths at depths both behind and in front of the focal point, starting practically from the plane of the transducer. The theoretical and experimental investigations and computer simulation for both spherical and rectangular transducer shapes have been performed. The results were used to estimate the beamwidths and the side lobe levels. A variant of the linear array has been studied for cylindrical lens of a fixed focal distance moving in a lateral direction. It has been shown that, in this case, a high resolution (of the order of a few wavelengths) can be achieved along all three Cartesian coordinates at a very high scanning velocity. The influence of the moving scatterers' velocity in inhomogeneous medium on the spatial radiation pattern characteristics has been estimated.
UR - http://www.scopus.com/inward/record.url?scp=0036883374&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0036883374&partnerID=8YFLogxK
U2 - 10.1109/TUFFC.2002.1159846
DO - 10.1109/TUFFC.2002.1159846
M3 - Article
C2 - 12546148
AN - SCOPUS:0036883374
SN - 0885-3010
VL - 49
SP - 1665
EP - 1685
JO - IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
JF - IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
IS - 12
ER -