The present invention relates to a method and associated apparatus for improving
the accuracy with which the speed of a fluid, such as a liquid, in particular blood
flowing in a duct, such as a blood vessel, in particular the aorta, is measured
by means of a signal emitted by a Doppler transducer (4). In characteristic
manner, according to the method, the Doppler transducer is associated with a programmable
memory (50) which contains at least one correction data item for correcting
the Doppler signal transmitted by the transducer (4) to a transducer control
and computer unit (8). Said computer unit (8) incorporates said signal
correction data item in its computation (at 16) of each speed measurement
on the basis of each signal emitted by the Doppler transducer, and it computes
the speed value while taking account of said correction data item so as to provide
a corrected measurement of the speed of said fluid, thereby improving its accuracy.
