title: Evaluation of the nasolacrimal canal in the basal projection.
abstract: The authors describe a new technique for visualization of the nasolacrimal canal in the basal projection. Cranial angulation of the x-ray tube by 14 degrees will project the canal anterior to the facial bones.
mesh_terms: D006801:Humans; D007765:Lacrimal Apparatus / Q000000981:diagnostic imaging*; D009301:Nasolacrimal Duct / Q000000981:diagnostic imaging*; D011859:Radiography; D013679:Technology, Radiologic