Contrast agents produce echoes because the impedance of the suspended particles is similar to the suspending medium.

Which of the following is the most consistent predictor of turbulent flow?

The Reynolds number predicts  _________.

A non steady flow with acceleration and deceleration over the cardiac cycle is termed_________.

When the direction of flow and the direction of the sound beam is 90 degree there will be no color in the vessel due to:

Venous pressure in the lower extremities is greater when erect due to ______.

Axial resolution is determined by ____ and lateral resolution is determined by ____.

Power Doppler imaging displays the signal’s :

Even in normal flow, the blood cells are not all moving at the same speed and direction,

In which direction does blood flow through on the top vessel? Heart color flow direction.png