Transducer acoustic lens

Details Transducer acoustic lens Transducer acoustic lens

1980-12-29

1983-06-14

Cohen, Lee S.

Surgery

Truss

Pad

73644, A61B 1000

Patent

active

043877206

ABSTRACT:
A lens structure is disclosed for a transducer that is utilized to transmit pulses of alternating pressure waves into the body of a patient and produce signals in response to reflections from the body. The lens is comprised of a first lens element having a concave face facing the crystals and a second lens element filling the space between. The acoustic velocity of the first lens element is greater than that of the body and of the second lens element, but the acoustic impedance of the lens elements is similar to that of the body.

REFERENCES:
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patent: 3687219 (1972-08-01), Langlois
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patent: 4184094 (1980-01-01), Kopel
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patent: 4277712 (1981-07-01), Honafy
patent: 4296349 (1981-10-01), Nakanishi et al.
patent: 4325381 (1982-04-01), Glenn
Wells, P. N. T., Ultrasonics in Physical Diagnosis, Churchill Livingstone, N.Y. 1977, pp. 97-112.

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