Processing velocity information in an ultrasonic system
US5628321A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1995 |
| Grant date | May 13, 1997 |
| Priority date | — |
| Expiry date | Dec 18, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/52071
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus in an ultrasonic system for determining an optimum cardiac cycle of a living subject, and for performing vascular measurements. Peak velocities of a spectra of echoes over a period of time due to pulses emitted into a subject under examination are determined. Based upon the peak velocities of the spectra over the period of time, a time series of the peak velocities are determined representing an optimum cardiac cycle. In addition, vascular measurements of the peak velocities for the optimum cardiac cycle can be determined from the optimum cardiac cycle. The peak velocities of the spectra can be performed by dividing the spectra in a plurality of regions according to ranges of the velocity information. A threshold magnitude of the peak velocities is determined by adding a predetermined value to a minimum magnitude. The threshold magnitude is used to find a peak velocity by searching for the peak velocity from a Nyquist velocity of the spectra, identifying a first velocity which has an magnitude exceeding the threshold magnitude, and using the first velocity as the peak velocity. Determining the optimum cardiac cycle of the living subject includes setting a thr…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.