Table 1 Recommended settings for colour and power Doppler in rheumatology
Doppler frequencyLowest or highest depending on machine
Pulse repetition frequencyLowest possible*
Colour priorityAll priority to colour
Wall filterLowest possible*
PersistenceLowest possible
GainOn the threshold to noise
FocusPlaced where highest sensitivity is required

  • *Lowest possible where motion artefacts are avoided most of the time.