Ultrasonic transducer array with a reduced number of transducer

Details Ultrasonic transducer array with a reduced number of transducer Ultrasonic transducer array with a reduced number of transducer

1994-09-23

1996-02-06

Jaworski, Francis

Surgery

Truss

Pad

310336, A61B 800, H01L 4104

Patent

active

054889561

ABSTRACT:
An ultrasonic transducer array in which distances between the array's transducer elements (T.sub.ij) increase in the direction of the rows (x direction) and in the direction of the columns (y direction) from a center of symmetry (S) outward. The integral over a straight-line function f(x) and/or g(y), which steeply decreases on either side of a center of symmetry (S) between the center points (M.sub.ij) of adjacent transducer elements (T.sub.ij), is constant for each row and/or column. Thus, the number of transducer elements (T.sub.ij) is reduced without considerable deterioration of the beam characteristic of the transducer array.

REFERENCES:
patent: 2837728 (1958-06-01), Schuck
patent: 2928068 (1960-03-01), Samsel
patent: 4518889 (1985-05-01), T'Hoen
patent: 4658176 (1987-04-01), Nakaya et al.
Turnbull et al., "Beam Steering with Pulsed Two-Dimensional Transducer Arrays," IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol. 38, No. 4, pp. 320-333 (Jul. 1991).
Martin et al., "A Simple Way to Eliminate Diffraction Lobes Emitted by Ultrasonic Transducers," The Journal of the Acoustical Society of America, vol. 49, No. 5 (Part 2), pp. 668-669 (May 1971).
Harris, "On the Use of Windows for Harmonic Analysis with the Discrete Fourier Transform," Proceedings of the IEEE, vol. 66, No. 1, pp. 51-83 (Jan. 1978).

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