AM/FM hybrid ultrasonic imaging

Details AM/FM hybrid ultrasonic imaging AM/FM hybrid ultrasonic imaging

1986-04-01

1987-09-08

Howell, Kyle L.

Surgery

Truss

Pad

73602, A61B 1000

Patent

active

046917071

ABSTRACT:
An ultrasonic acoustic imaging system includes a transmitter, a sonic pulse transducer which both applies acoustic pulses to the object under examination and receives echoes or reflected impulses, a digital scan converter, a display, and special reflected pulse processing circuitry for enhancing the displayed image. The special processing circuitry includes circuitry for the frequency demodulation of the reflected pulses, circuitry for providing a signal substantially representing the envelope or the amplitude of the reflected signal, and a multiplier for combining the frequency demodulated return signals with reflected envelope signals to apply to the scan converter. Alternative arrangements are also disclosed which produce substantially the same result.

REFERENCES:
patent: 4543826 (1985-10-01), Ferrari
patent: 4575799 (1986-03-01), Miwa et al.
patent: 4584880 (1986-04-01), Matyuk
patent: 4605008 (1986-04-01), Ferrari
Showker, T. H. et al., "Ultrasonic Tissue Characterization", in Ultrasound Annual, 1985, edited by R. C. Sanders et al., Raven Press, N.Y., .COPYRGT.1985, pp. 122-127.

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