ULTRASONIC DOPPLER IMAGE DEVICE

摘要

PURPOSE:To provide an ultrasonic Doppler image in which a Doppler deviation frequency can be accurately measured. CONSTITUTION:A probe 1 is driven by a driver 2 so that an output thereof may be amplified by a preamplifier 3, and a data train, obtained by separating an output signal of the preamplifier by an A/D converter 8, is subjected to addition/subtraction operation in an orthogonal adder-subtractor 9 and converted into a complex Doppler data. A frequency analysis is applied by a correlation arithmetic device 15 to this complex Doppler data, and the result is written as blood flow speed information in a frame memory 16 and displayed on a display 18.