Medical diagnostic ultrasound method and apparatus for improving doppler processing
US6179781A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 31, 1999 |
| Grant date | Jan 30, 2001 |
| Priority date | — |
| Expiry date | Mar 31, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B8/488
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method and system for Doppler processing of information at two or more different frequency bands for improved accuracy is provided. Signals from two or more unique frequency bands are processed separately to detect motion. Using signals at different frequency bands allows for more effective use of unused bandwidth to increase information content and improve estimation accuracy. One of or more of the two or more receive frequency bands may be within the transmitted fundamental frequency band or within harmonic frequency bands of the transmitted fundamental frequency band. The increased information content generated by using two separate narrow receive frequency bands is used to improve many aspects of motion detection. The resulting Doppler values of each parameter, such as velocity, energy, and variance parameters, are averaged or otherwise combined. One of the average, the Doppler values at each frequency band and a null value are selected for further processing and display. The resulting Doppler images may have improved accuracy and precision, without a loss in frame rate, resolution or displayed area. Further, the parameter selection process can be used to further improve diff…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.