Pulse-echo ultrasound system utilizing conjugate emitting and re

Details Pulse-echo ultrasound system utilizing conjugate emitting and re Pulse-echo ultrasound system utilizing conjugate emitting and re

1981-12-30

1984-02-14

Gill, James J.

Measuring and testing

Vibration

By mechanical waves

73632, G01N 2904

Patent

active

044308981

ABSTRACT:
A novel method for imaging body tissues is disclosed wherein an ultrasonic pulse having a radially asymmetric side-lobe pattern surrounding a central focal lobe is generated. A receiver for receiving echoes of this pulse is provided which exhibits a sensitivity to echoes from the aforementioned side-lobe pattern which is relatively decreased by comparison to its sensitivity to echoes from the central focal lobe. In the preferred embodiment, square transducers which are rotated with respect to the focal axis by about 45.degree. are used to practice the disclosed method.

REFERENCES:
patent: 2398701 (1946-04-01), Firestone
patent: 2625035 (1953-01-01), Firestone
patent: 3546924 (1970-12-01), Nussbaum et al.
patent: 4079352 (1978-03-01), Burkhardt et al.

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