Focusing mechanism for an ultrasound device

Details Focusing mechanism for an ultrasound device Focusing mechanism for an ultrasound device

1983-04-25

1985-08-06

Howell, Kyle L.

Surgery

Truss

Pad

128663, 73642, A61B 1000

Patent

active

045329338

ABSTRACT:
Side-by-side transmitting and receiving transducers of a medical Doppler ultrasound device are covered by a converging lens of synthetic rubber material through which the speed of ultrasound waves is slower than the speed of the waves in soft body tissue. The lens has a planar inner face butted against the planar transmitting and receiving faces of the transducers and a convexly curved outer face including two portions each extending over both transducers, one of such portions being smaller and more sharply curved than the other. The composite lens focuses the transmitted ultrasound waves in two zones overlapping in range so that the same transducer arrangement can be used in obtaining velocity information from deep or shallow blood vessels.

REFERENCES:
patent: 3927662 (1975-12-01), Ziedonis
patent: 4097835 (1978-06-01), Green
patent: 4217516 (1980-08-01), Iinuma et al.
patent: 4237729 (1980-12-01), McLeod et al.
patent: 4325381 (1982-04-01), Glenn
patent: 4327738 (1982-05-01), Green et al.
patent: 4355643 (1982-10-01), Laughlin et al.
patent: 4387720 (1983-06-01), Miller

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