title: CT-Cephalometry-A study in Indian population.
abstract: Determination of obstructive site in obstructive sleep apnoea (OSA) is of paramount importance is planning the management. Cephalometric evaluation of lateral X-rays when combined with clinical assessment and fibreoptic examination of the airway helps in locating the site of obstruction. The usual technique of cephalometry has been modified so as to give a better delineation of the soft tissues. Holding a 2mm card board in the mouth and using barium paste helped in more accurate calculations. Using our technique, various parameters have been quantified and a number of controls were studied and normal range derived. Further improvement in cephalometry has been done by using C.T. cephlometry topogram technique. A topogram is a scan done on a running table top cranio-caudally. Using the topogram technique 38 OSA patients were evaluated for all the parameters. The technique, its advantages over traditional cephalometry and the values obtained in the study are discussed in this paper.
authors.affiliation: ENT Dept, Apollo Hospitals, Jubilee Hills, 500 033 Hyderabad, India  ; Department of Head & Neck Surgery, Apollo Hospitals, Jubilee Hills, Hyderabad, India  ; Department of Radiology, Apollo Hospitals, Jubilee Hills, Hyderabad, India.
authors.forename: Janardhan J
authors.initials: JJ
authors.lastname: Rao
authors.forename: Vinaya Ec
authors.initials: VE
authors.lastname: Kumar
authors.forename: Sathavahana V
authors.initials: SV
authors.lastname: Chowdary
authors.forename: Ram K
authors.initials: RK
authors.lastname: Babu
authors.forename: Praveen
authors.initials: P
authors.lastname: Reddy
authors.forename: Jitender
authors.initials: J
authors.lastname: Reddy
keywords: Cephalometry; Obstructive sleep apnoea; topography