Ultrasonic diagnostic apparatus and method for processing ultrasonic signal
US6878113B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 2, 2001 |
| Grant date | Apr 12, 2005 |
| Priority date | — |
| Expiry date | Oct 20, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/52026
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An ultrasonic diagnostic apparatus acquires images different in a frequency. The invention is composed of a transducer including plural elements for sending an ultrasonic wave and receiving the reflected ultrasonic wave, analog to digital converters that digitize plural received signals, first mixers that respectively multiply a signal from the converter and a first digital reference signal, first filters that respectively extract a signal having a predetermined center frequency from a signal from each first mixer, digital delay units that respectively delay a signal from each first filter, an adder that adds plural signals from the digital delay units, and a second mixer that multiplies a signal from the adder and a second digital reference signal. An envelope detector detects a signal from the second mixer, and a scan converter converts a signal from the detector to a picture signal for display, so the pass band of the filter is not required to be changed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.