Patent ID: 8075485
Filing Date: 2011-12-13
Classification: A61B,G01S

Abstract:
1. A method of automatically setting a signal gain in a Doppler ultrasound haemodynamic monitor comprising the acts of: setting a signal gain in a Doppler ultrasound haemodynamic monitor; acquiring ultrasound data, by the Doppler ultrasound haemodynamic monitor, by scanning a region of interest; identifying an acceptable number of velocity components in an instantaneous blood velocity spectrum of the ultrasound data that exceeds a pre-defined minimum value; comparing the acceptable number of velocity components to a predetermined threshold; increasing a control variable when the acceptable number of velocity components is above said predetermined threshold; decreasing the control variable when the acceptable number of velocity components is below said predetermined threshold; comparing the control variable to a predetermined band; and automatically adjusting the signal gain when the control variable is outside the predetermined band.