TECHNICAL NOTE - COMPUTED TOMOGRAPHIC DACRYOCYSTOGRAPHY

The technique of computed tomographic dacryocystography is described. It was developed in response to the pre-operative imaging requirements for transnasal endoscopic dacryocystorhinostomy, a new minimally inva sive operation performed as a primary procedure to relieve epiphora. H owever, it is also helpful in the assessment of patients after failed conventional external dacryocystorhinostomy when the information provi ded will help to determine the subsequent surgical approach. In additi on the technique will assist surgical planning in cases of epiphora as sociated with sinus surgery, facial trauma and maxillofacial tumours b y determining the site and extent of pathology.