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Colour Doppler image of popliteal artery and vein

Longitudinal ultrasound image of the popliteal artery and vein with colour flow mapping. Blue colour indicates flow away from the transducer and red colour indicates flow towards the transducer. The light green quadrilateral is the colour Doppler sample volume. The vein appears larger than the artery in the two dimensional ultrasound image.

1. Digital artery Doppler flow pattern
2. Femoral artery Doppler pattern
3. Doppler tracings of limb arteries
4. Ultrasound image of subcutaneous edema