Ultrasonic diagnostic equipment and ultrasonic image...

Details Ultrasonic diagnostic equipment and ultrasonic image... Ultrasonic diagnostic equipment and ultrasonic image...

2007-12-04

2007-12-04

Jaworski, Francis J. (Department: 3768)

Surgery

Diagnostic testing

Detecting nuclear, electromagnetic, or ultrasonic radiation

C600S458000

Reexamination Certificate

active

10798353

ABSTRACT:
The difference frequency component between a first fundamental wave of frequencyfand a second fundamental wave of frequency f2is caused to interact with a second harmonic wave, thereby to attain the enhancement of a second harmonic signal, etc., whereby a reflected wave component to be imaged is extracted at a high S/N ratio. By way of example, in a case where the difference frequency component is to appear on the lower frequency side of the second harmonic wave of the first fundamental wave so as to be superposed on this second harmonic wave, the frequencies are set at f2=2.8for so. Besides, in a case where the difference frequency component is to appear on the higher frequency side of the second harmonic wave of the first fundamental wave so as to be superposed on this second harmonic wave, the frequencies are set at f2=3.2for so.

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