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Fig. 2A —51-year-old woman with varicose veins. Three-dimensional
volume-rendered image obtained at opacity–transparency function setting
for muscle planes shows enlarged left great saphenous vein (black
arrow) and tortuous varicose veins (asterisk). Perforating veins
are vividly shown, and paratibial (white arrow) as well as posterior
tibial (arrowhead) perforating veins are evident.