Patent ID: 6447455
Filing Date: 2002-09-10
Classification: A61B,G01S

Abstract:
An ultrasound diagnostic apparatus, comprising:means for generating sample data by transmitting an ultrasound signal into a human body and sampling a reflected signal of the ultrasound signal; means for generating frequency distribution data by processing the sample data, wherein the frequency distribution data includes a number of frequency components, each of the frequency components having a corresponding power level; means for determining a blood flow velocity on the basis of the frequency distribution data; and means for detecting whether or not an aliasing occurs in the frequency distribution data, wherein the aliasing detecting means computes a peak index corresponding to the fastest blood flow velocity component among frequency components comprising the frequency distribution data, selects a frequency range having the largest sum of power levels of the frequency components between a positive frequency range and a negative frequency range of the frequency distribution data, compares the selected frequency range with the peak index, and determines whether an aliasing occurs or not.