Energy weighted parameter spatial/temporal filter
US5609155A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 26, 1995 |
| Grant date | Mar 11, 1997 |
| Priority date | — |
| Expiry date | Apr 26, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H17/0202
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In an ultrasound imaging system, the mean velocity of a fluid flow, variance of velocity of the fluid flow and energy value of Doppler ultrasound signals from the flow in response to transmitted ultrasound are first estimated from autocorrelation values of the signals to form a set of parameters for a corresponding sampling time or a corresponding sampling location. An averaging process is then performed on two sets of the estimated parameters corresponding to a plurality of different sampling times in temporal filtering or on two sets of the estimated parameters corresponding to a plurality of different locations in spatial filtering. The filtered parameters are then compared to thresholds in a discrimination process to reject noise and clutter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.