Low profile transducer for intravascular ultrasound imaging and

Details Low profile transducer for intravascular ultrasound imaging and Low profile transducer for intravascular ultrasound imaging and

1994-03-08

1995-12-12

Jaworski, Francis

Surgery

Truss

Pad

29 2535, A61B 800

Patent

active

054740746

ABSTRACT:
An ultrasonic transducer includes a transducer element having a backing element bonded thereto. The thickness of the backing element is selected to be less than or equal to half the length of an ultrasonic pulse, expressed in wavelengths of the center frequency of the pulse, so that the first reflection from the back side of the backing element is received by the transducer element before the primary pulse rings down. A method for mounting the transducer that reduces the formation of air bubbles includes the steps of forming a peaked mound and continually lowering the transducer to flatten the mound against the underside of the transducer.

REFERENCES:
patent: 4387720 (1983-06-01), Miller
patent: 4841977 (1989-06-01), Griffith et al.
patent: 4911170 (1990-03-01), Thomas, III et al.
patent: 4917097 (1990-04-01), Proudion et al.
patent: 5203338 (1993-04-01), Jang
"Approximate Material Properties in Isotropic Materials," Alan R. Selfridge, IEEE Transactions on Sonics and Ultrasonics, vol. SU-32, No. 3, pp. 381-394, May 1985.

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