Ultrasonic processes and circuits for performing them

Details Ultrasonic processes and circuits for performing them Ultrasonic processes and circuits for performing them

1993-06-14

1995-04-25

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Acoustic image conversion

G01S 752

Patent

active

054105161

ABSTRACT:
A process for selective graphic representation and/or evaluation of the Doppler spectrum of objects limitedly resistant to sonic intensity, for example biological organs and tissues, by an ultrasonic process wherein a material is introduced in the examination area to be acoustically irradiated, nonlinear oscillations are produced in the examination area by irradiated ultrasonic waves and the signal is evaluated by an ultrasonic converter. Also, a circuit for carrying out the above process is disclosed.

REFERENCES:
patent: 3640271 (1972-02-01), Horton
patent: 4452082 (1984-06-01), Miwa
patent: 4483345 (1984-11-01), Miwa
patent: 4532812 (1985-08-01), Birchak
patent: 4610255 (1986-09-01), Shimura et al.
patent: 5255683 (1993-10-01), Monaghan
Germain et al., "Generation and detection of high-order harmonics . . . ", J. Acoust. Soc. Am. 83 (3) Mar. 1988, pp. 942-949.
Law et al., "Ultrasonic determination of the nonlinearity parameter . . . " J. Acoust. Soc. Am. 69 (4), Apr. 1981, pp. 1210-1212.

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