TECHNIQUE OF 3-DIMENSIONAL RECONSTRUCTION IN POWER DOPPLER - IN-VITROAPPLICATION IN NORMAL AND STENOSED BIFURCATION OF THE PULMONARY-ARTERY

Power Doppler imaging is an ultrasonic technique representing circulat ing red cells as a colour signal independant of their direction and an gle of analysis. This noninvasive technique provides a morphological r epresentation of blood flow within a blood vessel. This in vitro study in pulsed flow enabled three-dimensional reconstruction of blood flow in the bifurcation of the pulmonary artery with automatic shifting of the ultrasound probe and an integral digital transfer of the echograp hic data. The software for treating the images and for volumic reconst ruction of the flow is explained. This technique provides a quantitati ve method of assessing residuel intrastenotic flow with a simple compu ter system.