Measuring and testing – Vibration – By mechanical waves
Patent
1982-10-20
1984-04-17
Goldberg, Gerald
Measuring and testing
Vibration
By mechanical waves
128660, G01N 2900
Patent
active
044427158
ABSTRACT:
The ultrasonographer changes the frequency of ultrasound pulses emitted from an ultrasonic transducer as a result of adjusting the RF frequency of the transmitter burst exciting the broadband transducer; this adjustment takes place between pulse transmissions, while examining the patient. In a phased array imager utilizing baseband processing of received echo signals, the same adjustment supplies the corresponding frequency to the demodulator circuits. An alternative method of changing the system spectrum is to have a narrow bandwidth receiver whose center frequency is varied over the available bandwidth.
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Brisken Axel F.
Smith Lowell S.
Campbell Donald R.
Chapman, Jr. John E.
Davis Jr. James C.
General Electric Company
Goldberg Gerald
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