Depth dependent bandpass of ultrasound signals using heterodyne

Details Depth dependent bandpass of ultrasound signals using heterodyne Depth dependent bandpass of ultrasound signals using heterodyne

1992-01-14

1993-06-15

Williams, Hezron E.

Measuring and testing

Vibration

By mechanical waves

12866006, G01N 29000

Patent

active

052188698

ABSTRACT:
An ultrasound imaging system and method for examining the interior of an object. The imaging system includes an apparatus for transmitting and receiving ultrasound waves. A receiver amplifies echo signals from over a range of depths from within the object and generates electrical signals, each having a spatial spectrum. The imaging system also includes a compensation apparatus which compensates the spectral distribution of the signal by sweeping the spectrum of the signals in accordance with the depth from which the echo signals are reflected. In the currently preferred embodiment, the compensation apparatus sweeps from the low frequencies to the high frequencies of the spectrum.

REFERENCES:
patent: B14016750 (1984-05-01), Green
patent: 4197750 (1980-04-01), Hassler
patent: 4463608 (1984-08-01), Takeuchi et al.
patent: 4676251 (1987-06-01), Bernatets
patent: 4738138 (1988-04-01), Redman-White
patent: 4757715 (1988-07-01), Miwa et al.

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