Ultrasonic imaging apparatus
US4413520A · kind A · utility
13Cited by
2References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 16, 1981 |
| Grant date | Nov 8, 1983 |
| Priority date | — |
| Expiry date | Jun 16, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K11/343
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An ultrasonic imaging apparatus comprises transducers for transmitting ultrasonic waves and receiving acoustic. The apparatus also transmits ultrasonic waves of different frequencies simultaneously from a plurality of transducers. The frequency characteristics of the transducers are determined in a manner so as to produce the function of frequency filters. An electric filter is additionally provided for compensation. Thus, crosstalk is eliminated even when the frequency difference between the transmitting ultrasonic waves is kept small.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.