Surgery – Truss – Perineal
Patent
1977-02-11
1979-02-20
Michell, Robert W.
Surgery
Truss
Perineal
120 205Z, 73626, 73900, A61B 1000
Patent
active
041401077
ABSTRACT:
An echoscope for examination of objects with the aid of an ultrasound beam, comprising at least one electro-acoustic element for transmitting and receiving ultrasonic pulses during a transmission-reception period divided into n consecutive time intervals. The ultrasonic pulses are sent to the objects to be examined and are reflected therefrom. The echo signals supplied by the receiving element are amplified by an amplifier with time-dependent gain control. The gain control is brought about by a control voltage generator which supplies a control voltage to said amplifier for determining its signal gain as a function of time. Adjusting means for the control voltage generator are provided to make it possible to change the magnitude of the control voltage in the time intervals as a function of time. The apparatus also comprises a device for visually displaying the echo signals received during each transmission-reception period.
REFERENCES:
patent: 4016862 (1977-04-01), Lancee et al.
Lancee Charles T.
VAN Zwieten Gerardus
Erasmus University Rotterdam
Jaworski Francis J.
Michell Robert W.
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