Patent ID: 9107602
Filing Date: 2015-08-18
Classification: A61B,G01S

Abstract:
1. An ultrasound system, comprising: a probe configured to transmit ultrasound signals to a target object and receive ultrasound echoes reflected from the target object to thereby acquire ultrasound data; and a processing unit connected to the probe and configured to: form a Doppler signal corresponding to each of a plurality of pixels constructing a Doppler mode image based on the ultrasound data, adjust coefficients of a clutter filter based on characteristics of the Doppler signal for each of the pixels for performing clutter filtering upon the Doppler signal, the coefficients including a cutoff frequency and stopband attenuation, determine minimum and maximum cutoff frequencies and minimum and maximum stopband attenuations based on the characteristic of the Doppler signal, determine, on a coordinate system associating the cutoff frequency with the stopband attenuation, a first coordinate having the minimum cutoff frequency and the minimum stopband attenuation and a second coordinate having the maximum cutoff frequency and the maximum stopband attenuation, determine a path connecting the first coordinate and the second coordinate, and set a particular stopband attenuation and a particular cutoff frequency for a particular pixel according to an amplitude of a clutter signal contained in the Doppler signal and the path connecting the first coordinate and the second coordinate.