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:
Apr. 09, 1985
Filed:
Sep. 23, 1982
Yasutsugu Seo, Ootawara, JP;
Tokyo Shibaura Denki Kabushiki Kaisha, Kawasaki, JP;
Abstract
An ultrasonic diagnostic system is disclosed, which comprises an ultrasonic transducer array having plural transducer elements for transmitting an ultrasonic beam and generating echo signals from the echos reflected from an object, a circuit for exciting the transducer elements to generate the ultrasonic beam that propagates along a predetermined scanning line on the object, and a receiver circuit for time delaying and summing the echo signals to produce a summed output signal. In order to obtain velocity information from a moving object, the equipment further comprises a phase detecting circuit for selecting a Doppler shift signal from the summed output signal to produce a phase detected signal, a digital filter circuit for removing the phase detected signal component reflected from objects moving at lower speed than a predetermined speed from the Doppler shift signal, a circuit for envelope detecting the output signal from the digital filter circuit, a circuit for brightness modulating the amplitude of the output signal from the envelope detecting circuit, and a display unit for displaying the output signal from the brightness modulating circuit as a function of time in real time.