Fig 3.

MR DCG evaluation of bilateral LDSs treated with nasolacrimal stents 4 years before the examination. A, Bilateral DS DCG reveals severe nasolacrimal stenoses on both sides (arrows) with prominent dilation of the left lacrimal sac (arrowhead). B, The fourth-year follow-up DS DCGs show the patent lumens of polyurethane nasolacrimal stents (white arrows) in the LDSs with free flow of contrast media to the nasal cavity on both sides. C, Coronal MIP DCG image from an axial FSPGR sequence demonstrates the patency of the stent lumens on both sides.