Ultrasonic diagnostic transducer array with elevation focus

Details Ultrasonic diagnostic transducer array with elevation focus Ultrasonic diagnostic transducer array with elevation focus

1994-06-24

1996-08-20

Manuel, George

Surgery

Truss

Pad

310368, 73627, A61B 800

Patent

active

055469469

ABSTRACT:
An ultrasonic diagnostic transducer array is provided for providing electronic focusing in the longitudinal plane and elevational focusing. Elements of the array are subdiced in the elevational direction to provide subelements with aspect ratios varying in proportion to their distance to the central longitudinal axis of the array. Such variation affords varying electro-mechanical coupling coefficients to the subelements such that the intensity of the transmitted energy is centered about the central longitudinal axis. In a second embodiment elements exhibit extensions in the elevational direction which vary in proportion to their displacement from the longitudinal center of the array. The extended elements are acoustically separated into subelements in the elevational direction to provide elevational focusing or spatial compounding of the transmitted acoustic energy.

REFERENCES:
patent: 3086195 (1963-04-01), Halliday
patent: 3964014 (1976-06-01), Tehon
patent: 4586512 (1986-05-01), Do-huu et al.
patent: 5099459 (1992-05-01), Smith
patent: 5115810 (1992-05-01), Watanabe et al.
patent: 5235986 (1993-08-01), Masak et al.
"Bow-Tie Transducers For Measurement of Anisotropic Materials in Acoustic Microscopy", Douglas A. Davids et al., Proc. 1986 Ultrasonics Symposium, pp. 735-740.
"Spatial Apodisation Using Modular Composite Structures", publ. in Proceedings of 1989 Ultrasonics Symposium at pp. 767-770 (1989).

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