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, 1992
Filed:
Feb. 13, 1990
Hitachi, Ltd., Tokyo, JP;
Abstract
An ultrasonic measuring system including a transducer having a plurality of row electrodes on one surface thereof and a plurality of column electrodes crossing the plurality of row electrodes on the other surface thereof and made of an electrostrictive material in which piezoelectricity is induced by a bias electric field applied thereto to thereby obtain sectional images sequentially. A row position selector is connected to the row electrodes to select several row electrodes and apply a direct current bias voltage to the selected electrode and to shift the position of the selection sequentially. An electronic B-mode image scanner is connected to the column electrodes to shift the directivity of the transmission/reception ultrasound beams sequentially widthwise of the column electrodes (in the direction of row extension) to obtain echo signals indicative of an acoustic reflective response. An acoustic lens may be provided over the entire surface of the transducer so as to be moved synchronously with selection of the row electrodes by the row position selector.