Patent ID: 7513872

Claim:
An ultrasonic Doppler measuring apparatus comprising: an ultrasonic probe having an ultrasonic transducer which performs ultrasonic wave transmission/reception in a predetermined direction of an object to be examined; a transmission unit which transmits an ultrasonic wave by driving the ultrasonic transducer; a reception unit which receives a reception signal from the object which is obtained by transmission/reception of the ultrasonic wave; a Doppler signal detecting unit which detects a Doppler signal with respect to the reception signal; a spectrum data generating unit which time-serially generates Doppler spectrum data by setting a predetermined window function for the Doppler signals at a predetermined region which are time-serially obtained by repeating ultrasonic wave transmission/reception in the predetermined direction; a Doppler sensitivity measuring unit which measures a Doppler sensitivity on the basis of said plurality of Doppler spectrum data generated by the spectrum data generating unit; a spectrum shape model generating unit which generates a spectrum shape model on the basis of the window function; a threshold setting unit which sets a threshold range in which trace waveform data displaces by a predetermined amount in a frequency axis direction and sets a plurality of thresholds in the threshold range on the basis of the spectrum shape model and the Doppler sensitivity; a trace data generating unit which generates as the trace waveform data a temporal change in Doppler frequency of the Doppler spectrum data which corresponds to a threshold selected from said plurality of thresholds; and a display unit which displays the trace waveform data.