TY - GEN
T1 - Steering of Limited diffraction beams with a two-dimensional array transducer
AU - Lu, Jian Yu
AU - Greenleaf, James F.
N1 - Funding Information:
If 35% change of the projection of the ape- is allowed, only 4 elliptic ring patterns are required to cova a steering angle from -45O to +4S0 (total change of the projection of the aperture will be about 40%) to simplify the associated electronic system. V. ACKNOWLEDGMENTS The authors appreciate the secretarial assistance of Elaine C. Quarve and the graphic assistance of Julie M. Patterson. Tlus work was supported m part by grants CA 43920 and CA54212-01 from the National Institutes of Health.
Publisher Copyright:
© 1992 IEEE.
PY - 1992
Y1 - 1992
N2 - Limited diffraction beams such as Bessel beams and X waves have large depth of field and could have applications in medical ultrasound and other wave related areas. However, they are usually produced by annular arrays which have to be scanned mechanically. In this paper, the production and steering of the limited diffraction beams with a two-dimensional array are studied. Results show that good limited diffraction beams can be produced if the size of the array elements is small and the array aperture is compensated so that the projection of the aperture on a plane perpendicular to the beam axis is a constant annular ring pattern. The electronic system for controlling the two-dimensional array is described and methods to simplify it are proposed.
AB - Limited diffraction beams such as Bessel beams and X waves have large depth of field and could have applications in medical ultrasound and other wave related areas. However, they are usually produced by annular arrays which have to be scanned mechanically. In this paper, the production and steering of the limited diffraction beams with a two-dimensional array are studied. Results show that good limited diffraction beams can be produced if the size of the array elements is small and the array aperture is compensated so that the projection of the aperture on a plane perpendicular to the beam axis is a constant annular ring pattern. The electronic system for controlling the two-dimensional array is described and methods to simplify it are proposed.
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U2 - 10.1109/ULTSYM.1992.275929
DO - 10.1109/ULTSYM.1992.275929
M3 - Conference contribution
AN - SCOPUS:3342977104
T3 - Proceedings - IEEE Ultrasonics Symposium
SP - 603
EP - 607
BT - 1992 Ultrasonics Symposium Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 1992 Ultrasonics Symposium
Y2 - 20 October 1992 through 23 October 1992
ER -