The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 24, 1987
Filed:
Mar. 28, 1985
Kouroku Namekawa, Tokyo, JP;
Akimitsu Harada, Tokyo, JP;
Aloka Co., Ltd., Tokyo, JP;
Abstract
An ultrasonic diagnostic device for measuring the velocity of blood flow within a living body comprises a transmitter for transmitting an ultrasonic wave into the body, a receiver for amplifying the part of the ultrasonic wave reflected from the body, converting it into an electric signal and amplifying the signal in accordance with a logarithmic amplification characteristic, a converter circuit which receives the amplified signal from the receiver and a reference signal from the transmitter and outputs a signal corresponding to the ratio of the component of the reflected ultrasonic wave attributable to the blood flow and the component thereof attributable to the wall of the blood vessel through which the blood flows, an extraction circuit which receives the amplified signal from the receiver and outputs a signal corresponding to the component attributable to the wall of the blood vessel, and an arithmetic circuit which multiplies the signals output by the converter circuit and the extraction circuit, whereby there is obtained a signal corresponding to the velocity of the blood flow.