Artefacts

Question 1

How to reduce aliasing

Answer 1

Shift baseline, maximize velocity scale, decrease sector depth, lower frequency, reduce sector.

Question 2

What is blooming artefact

Answer 2

In “blooming,” soft tissues are color-coded as if they contain
true blood flow. Also known as “color bleed,” this artifact
results from abnormally high-gain settings and the artifact
may potentially obscure pathology47 such as severe atherosclerosis in the aorta (Fig. 14). Doppler gain does not affect
the intensity of the transmitted pulse.

Question 3

Twinkling

Answer 3

“twinkling” artifacts are a mosaic of rapidly changing blue
and red patches of color near strongly reflective surfaces
resulting in patterns that imitate abnormal flow

Question 5

Blood density

Answer 5

Measure of a mediums resistance too acceleration such as the greater mass of a medium, the greater resistance to flow.
The density of blood is the mass of blood per unit volume and is equal to 1.05 g/ml

Question 6

Blood Viscosity

Answer 6

A measure of the resistance to the flow of a fluid. Viscosity describes the ease with which fluid particles move past one another such that the higher the Viscosity of the fluid the greater the resistance to flow. The Viscosity of blood is 0.035 poise at 37degrees

Question 7

Blood Viscosity

Answer 7

A measure of the resistance to the flow of a fluid. Viscosity describes the ease with which fluid particles move past one another such that the higher the Viscosity of the fluid the greater the resistance to flow. The Viscosity of blood is 0.035 poise at 37degrees