Spectral Doppler detection
AssigneeSiemens Medical Solutions USA, Inc.
InventorsKing Yuen Wong, Paul D. Freiburger
Life of this patent
Estimating the term…
Abstract
In spectral pulsed wave Doppler imaging, spatial variance in signal and/or noise are reduced by combination of multiple spectra with at least partially decorrelated noise. Rather than requiring oversampling in time, the multiple spectra for one Doppler gate are created from different spatial signals. The Doppler gate is divided into sub-gates, the beamformed sample locations in the Doppler gate are grouped into two or more groups using any selection criterion, and/or different receive apertures are used to simultaneously sample the Doppler gate. Spectra for the gate are estimated from the samples with the different spatial content and then combined.
Claims20
A method for spectral Doppler imaging, the method comprising:
- acquiring, with an ultrasound system, first and second sets of samples representing response from a range gate with first and second spatial content, respectively, the first spatial content different than the second spatial content;
- estimating, by a Doppler estimator, first and second spectra for the range gate from the samples of the first and second sets, respectively;
- combining information for the two or more spectra into a combined spectrum;
- and
- displaying a spectral Doppler strip as a function of the combined spectrum.
A method for pulsed wave spectral Doppler imaging, the method comprising:
- acquiring, with an ultrasound system, samples representing a plurality of locations in a user-defined Doppler gate in a patient;
- estimating, with a Doppler estimator, a plurality of spectra, each of the spectra estimated from samples for different groupings of the locations;
- combining the spectra into a combined spectrum;
- and
- displaying a spectral Doppler strip as a function of the combined spectrum.
A system for pulsed wave spectral Doppler imaging, the system comprising:
- a beamformer configured to sample a gate at a pulse repetition interval established in response to a velocity scale;
- a Doppler estimator configured to generate multiple pulsed wave spectra from the sampling of the gate, each of the pulse wave spectra responsive to different spatial aspects of the gate;
- a processor configured to combine the pulsed wave spectra;
- and
- a display configured to display a spectrum from the combination.
Dependencies are inferred from the claim text.