The intensity of colour in Doppler is determined by -
Color intenstiy indicates the relative velocity of the red blood cells. yellow white represents the highest velocity for flow directed towards the transducer. green white represents the highest velocity for flow directed away from the transducer. Doppler effect is due to shift in sound frequency as the sound as reflected from the moving Red blood cells.
Direction of flow
Velocity of flow
Strength of returning echo
None of the above
Fundamentals in Radiology