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:
Aug. 08, 2000
Filed:
Apr. 26, 1999
Hiroshi Fukukita, Tokyo, JP;
Morio Nishigaki, Fujisawa, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An ultrasonic diagnostic system includes a transducer. A first electric drive signal is fed to the transducer. A second electric drive signal is fed to the transducer at a time different from a time of the feed of the first electric drive signal thereto. The second electric drive signal has a waveform different from a waveform of the first electric drive signal. A first received signal is derived from an output signal of the transducer. The first received signal represents ultrasonic echoes related to an ultrasonic beam caused by the transducer in response to the first electric drive signal. A second received signal is derived from the output signal of the transducer. The second received signal represents ultrasonic echoes related to an ultrasonic beam caused by the transducer in response to the second electric drive signal. The first received signal is subjected to a waveform equalizing process, thereby being converted into a third received signal having a waveform corresponding to a waveform of the second received signal. A calculator operates for calculating a difference between the second received signal and the third received signal, and generating a signal representing the calculated difference.