Combination of Ultrasonic 2D-Echo Amplitude Imaging and Doppler Measurements

Abstract

Many Doppler measurements can be done without the guidance of imaging, even in complex geometrical structures as the heart, Hatle & Angelsen 1978. Assistance of 2D echo amplitude imaging is, however, helpful in guiding the Doppler measurements, especially in the learning phase when the operator has limited skills. One problem in this is that the transducer locations for Doppler measurements are not always the same as the locations for good images. For Doppler measurements one should angle the ultrasonic beam along the flow direction, while for echo amplitude imaging the beam often has a large angle to the flow direction.