Method and device for localization and focusing of acoustic wave

Details Method and device for localization and focusing of acoustic wave Method and device for localization and focusing of acoustic wave

1990-02-08

1992-03-03

Jaworski, Francis

Surgery

Truss

Pad

128 24EL, 12866001, A61B 1722

Patent

active

050923366

ABSTRACT:
For focussing an ultrasound beam delivered by a transducer array on a reflective target in a medium, for instance in organic tissues, the zone including the target is illuminated with an unfocussing acoustic beam. The shapes and position of echo signals delivered by electro-acoustic transducers of a regular array are individually stored; the distribution in time and the shapes of the echo signals for obtaining reversed signals are reversed and the reversed signals are applied to the respective transdcuers of the array.

REFERENCES:
patent: 4315514 (1982-02-01), Drewes et al.
patent: 4526168 (1985-07-01), Hassler et al.
patent: 4757820 (1988-07-01), Itoh
patent: 4865042 (1989-09-01), Umemura et al.
IEEE 1987 Ultrasonics Symposium Proceedings, Denver, Colorado, October 14-16, 1987, vol. 2, pp. 863-866, IEEE, New York, U.S.; M. Ibbini et al: "Ultrasound Phased Arrays for Hyperthermia: New Techniques Based on the Field Conjugation Method" p. 863, col. 1, line 44-p. 863, col. 2, line 6.

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