Fig. 13From: Blood finds a way: pictorial review of thoracic collateral vesselsCollateral placement of central lines. a Axial CT image demonstrating placement of a central line through the hemiazygous (white arrow) and azygos vein (gray arrow). b CT scout image showing the tortuous path the line takes through the collateral vessels to the right atrium. c Interventional venogram of the same patient demonstrating collateral placement of the lineBack to article page