Device for combined B-scan and B/A imaging
US4702258A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 4, 1986 |
| Grant date | Oct 27, 1987 |
| Priority date | — |
| Expiry date | Feb 4, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/02491
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The combined modality device comprises an ultrasound transducer (10) which is suitable for transmission as well as reception and which is connected to a transmitter stage (20) as well as to a receiver stage (30). The transducer (10) has a bandwidth which at least equals approximately one octave. The transmitter stage (20) comprises a generator for generating activation signals for the transducer (10) with a frequency f.sub.o near the lower limit of said bandwidth, the spectrum of these activation signals excluding the frequency f.sub.1 =2f.sub.o. The receiver stage (30) comprises a B-scan channel and also a B/A processing channel (200) which itself includes a bandpass filter (210) which is centered around said frequency f.sub.1, an envelope detector (220, 230), a comparison circuit (240), a differentiation circuit (250) and a display device (260) whereby measured results in both modalities may be displayed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.