Principles of Colour Doppler Practice Quiz

Question 1

High colour variance corresponds with laminar flow.

True

False

Answer 1

False

Question 2

Data collected from colour Doppler imaging is used to calculate which of the following

Variance

peak velocity

mean Doppler shift

Doppler power

Answer 2

Variance

mean Doppler shift

Doppler power

Question 3

Which of the following statements is TRUE:

If the colour gain is too low it may cause overestimation of pathology quantification.

If the colour scale is low flow may appear turbulent.

If colour gain is too high laminar flow may appear turbulent.

If the colour scale is low flow may appear turbulent.

If colour gain is too high it may cause underestimation of pathology quantification.

Answer 3

If the colour scale is low flow may appear turbulent.

Question 4

When analysing high velocity blood, which of the following can be used to optimise colour Doppler imaging.

A. increase colour gain until it speckles then reduced slightly

B. decrease velocity scale

C. minimize box width

D. attempt to interrogate hemodynamics in the near field

Answer 4

A. increase colour gain until it speckles then reduced slightly

C. minimize box width

D. attempt to interrogate hemodynamics in the near field

Question 5

Which of the following adjustments are used to overcome aliasing on colour Doppler:

A. decreasing the colour box width

B. adjusting the baseline

C. decreasing the transducer frequency

D. decreasing the colour box length

Answer 5

B. adjusting the baseline

C. decreasing the transducer frequency

D. decreasing the colour box length

Question 6

With colour Doppler imaging the measure of the variation in mean Doppler frequencies from a volume corresponds to a single pixel of pulsed Doppler sample volume.

True
or
False

Answer 6

True