Surgery – Truss – Pad
Patent
1985-03-21
1987-06-30
Kamm, William E.
Surgery
Truss
Pad
73599, A61B 1000
Patent
active
046762515
ABSTRACT:
A device for the scanning of media by means of ultrasound echography, comprising at least one ultrasonic transducer (10) which is associated with a transmitter stage (50) and with a receiver-stage which comprises a conventional first processing circuit (101, 102, 103) and a second processing circuit which is connected parallel thereto and which comprises a series connection of a circuit (210) for automatic gain control as a function of the distance of the echos, a heterodyne circuit (230), and n parallel channels, each of which comprises a series connection of a circuit for the correction of diffraction effects, a filter (240a . . . 240n) for selecting a narrow frequency band from the pass-band of the transducer, a logarithmic amplifier (250a . . . 250n) and a divider (260a . . . 260n) whose output is connected to one of the n inputs of a circuit (270) for determining values whose output is connected to the display device provided in the first processing circuit.
REFERENCES:
patent: 3765192 (1972-07-01), Fahrbach
patent: 4446737 (1984-05-01), Hottier
patent: 4452082 (1984-06-01), Miwa
patent: 4511984 (1985-04-01), Sumino et al.
patent: 4564019 (1986-01-01), Miwa
Haken Jack E.
Jaworski Francis J.
Kamm William E.
U.S. Philips Corporation
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