Ultrasonic imaging system
US5097709A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 13, 1990 |
| Grant date | Mar 24, 1992 |
| Priority date | — |
| Expiry date | Feb 13, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R17/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.