INVESTIGATIONS OF PHYSICAL MECHANISMS OF ULTRASOUND DOPPLEROGRAPHY ARTIFACT "PSEUDO-FLOW"
Physical mechanisms of appearance of pseudo-flow" artifact caused by real liquid movement under ultrasound influence due to streaming effect are investigated. Artifact pseudo-flow" consist in image liquid colouring during ultrasound dopplerography procedure. Experiments are made on the modeling environment (liquid with gas bubbles). The fundamental laws of artefact "pseudo-stream" appearance under the influence of radiating pressure forces are presented. The investigated physical mechanisms allow to predict artefact parametres for any composition of liquid and gas environments with any bubble sizes at various intensity levels of and working frequencies of ultrasound sensors. Studying of physics of artefact appearance gives the possibility of its elimination and reception of more true echogram and hence reduces a diagnostic error. Because of artifact "pseudo-flow" is a diagnostic disease sign of ultrasound dopplerography knowledge of appearance laws its allows to raise the informativity about a blood-groove and other moving structures.