Ultrasonic imaging apparatus
US4930514A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 1988 |
| Grant date | Jun 5, 1990 |
| Priority date | — |
| Expiry date | Aug 4, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/52071
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An ultrasonic imaging apparatus comprises an ultrasonic transducer for emitting ultrasonic pulses at a rate frequency fr and converting an echo wave of the ultrasonic pulses into an echo signal, an orthogonal detector circuit for orthogonally detecting an echo signal provided from the ultrasonic transducer and a calculator circuit for obtaining Doppler data from the orthogonal detection signal and providing color Doppler data. The output of the calculator circuit is coupled to an interpolator circuit. When the interpolator circuit receives color Doppler data at a frequency above +fr/2 or -fr/2 from the calculator circuit, it interpolates the Doppler data according to a predetermined argorithm for excluding interpolation data corresponding to a zero region between +fr/2 and -fr/2. The color Doppler data including interpolation data is displayed as color image on the monitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.