Surgery – Truss – Pad
Patent
1983-12-16
1986-08-05
Howell, Kyle L.
Surgery
Truss
Pad
73644, A61B 1000
Patent
active
046037012
ABSTRACT:
A stand-off device for use with acoustic transducers is described in which a chamber having a diaphragm portion contains liquid, the ratio of the acoustic impedance of said diaphragm to the acoustic impedance of soft body tissue and the ratio of the acoustic impedance of said liquid to the acoustic impedance of said diaphragm being whole numbers or fractions, and said diaphragm being of such thickness that reflections from its diaphragm/body interface, when it is held against the body of a patient, and its liquid/diaphragm interface tends to cancel each other.
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patent: 4059098 (1977-11-01), Murdock
patent: 4184094 (1980-01-01), Kopel
patent: 4185501 (1980-01-01), Proudian et al.
patent: 4279167 (1981-07-01), Erb et al.
Paulaskas et al, "Ultrasonic Investigation of the Three Component Systems Dioxan-Water-RbCl (or CsCl)", Ul'trazvuk No. 9, 1977, pp. 67-69.
Abaraviciute et al, Ultra Acoustical Studies of Ethanol-Water-Cesium Chloride, Barium Chloride, or Lanthanum Chloride Systems, Lietsr Aukstuju Mokyklu Darbei Ultragarsas Nauch Tr Vyssh Ucheb Zavedenii Litssr Ul'trazvuk, (9), 70-3, 1977.
Smirnov et al, Ultrasound Velocity and Adiabatic Compressibility in Cesium Halide Binary Fused Mixtures, Deposited Doc., Viniti 7046-73, 15 pages, 1973.
Hewlett--Packard Company
Howell Kyle L.
Smith Ruth S.
Timbie Donald N.
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