Patent ID: 6126604
Filing Date: 2000-10-03
Classification: G01S

Abstract:
An ultrasonic color flow mapping system for regenerating an ultrasonic Doppler signal as an image, the ultrasonic color flow mapping system comprising:a forward processing portion for excluding initial output data up to a predetermined number from outputs based on an ultrasonic Doppler signal input having a predetermined index sequence;a backward processing portion for excluding initial output data up to a predetermined number from outputs based on the ultrasonic Doppler signal input having a backward index sequence with respect to the input of the forward processing portion;an operator for calculating a power and an average frequency of the ultrasonic Doppler signal based on the outputs of the forward and backward processing portions and providing the calculated result as an output for image regeneration,wherein said forward and backward processing portions each comprise:a filter portion having a plurality of infinite impulse response filters, for excluding the initial output data up to the predetermined number, andan autocorrelation estimator for autocorrelating outputs from said filter portion, andwherein said operator comprises a plurality of subtracters and adders for subtracting and adding respectively outputs from said autocorrelation estimator to determine the power and the average frequency of the ultrasonic Doppler signal.