DOPPLER SOUND GENERATING METHOD FOR ULTRASONIC DIAGNOSTIC DEVICE AND ULTRASONIC DIAGNOSTIC DEVICE

摘要

PURPOSE: To generate a Doppler sound corresponding to a sonogram image by constituting so as to also change the Doppler sound according to the shift of a base line and adjustment of the sonogram image by an operator. ;CONSTITUTION: An echo signal reflected by a living body after being radiated from an ultrasonic probe l is sent out to mixers 4a and 4b or the like through a beam former 2. A Doppler signal is converted into digital data by A/D converters 9a and 9b (a sampling frequency fs), and the sampling frequency of the digital data is increased to 2fs by an interpolation filter 14. At this time, a filter factor C to shift a frequency band of the filter 14 according to a base line shift quantity of a sonogram image is set by a filter factor setting unit 15, and after an output signal of this filter 14 is coverted into an analog signal, only a base band frequency is taken out by filters 17a and 17b, and a Doppler sound is generated from left and right loudspeakers 22a and 22b.;COPYRIGHT: (C)1996,JPO