title: Utility of helical computed tomography in the study of arytenoid dislocation and arytenoid subluxation.
abstract: Conventional computed tomography (CT) has been considered a mainstay in the evaluation of the larynx. A major difficulty with utilizing this modality, especially in the study of the arytenoid, is the time necessary to perform a thin-slice examination through a structure that has a propensity to move with respiration and swallowing. Helical CT not only significantly reduces the time necessary to study the larynx, but enables one to perform multiple high-resolution multiplanar reconstructions. Eleven patients with arytenoid abnormalities documented by strobovideolaryngoscopy or direct laryngoscopy were imaged with helical CT. A comprehensive radiographic examination illustrating the cricoarytenoid relationship in all of the subjects was completed in less than 20 seconds by using axial reconstructions in 2-mm-thick slices at 1-mm intervals, with subsequently derived sagittal and coronal reconstructions. Helical CT may be a useful adjunct in the diagnosis of arytenoid subluxation or dislocation.
authors.affiliation: Department of Otolaryngology, Louisiana State University Medical Center of New Orleans, USA.
authors.forename: A E
authors.initials: AE
authors.lastname: Alexander
authors.forename: G D
authors.initials: GD
authors.lastname: Lyons
authors.forename: M A
authors.initials: MA
authors.lastname: Fazekas-May
authors.forename: P L
authors.initials: PL
authors.lastname: Rigby
authors.forename: D W
authors.initials: DW
authors.lastname: Nuss
authors.forename: L
authors.initials: L
authors.lastname: David
authors.forename: K
authors.initials: K
authors.lastname: Williams
mesh_terms: D000328:Adult; D000368:Aged; D001193:Arytenoid Cartilage / Q000293:injuries*; D005260:Female; D006685:Hoarseness / Q000209:etiology; D006801:Humans; D007442:Intubation, Intratracheal / Q000009:adverse effects; D004204:Joint Dislocations / Q000000981:diagnostic imaging* / Q000209:etiology; D007828:Laryngoscopy; D008297:Male; D008875:Middle Aged; D015203:Reproducibility of Results; D013997:Time Factors; D014057:Tomography, X-Ray Computed / Q000592:standards*; D014743:Videotape Recording; D014832:Voice Disorders / Q000209:etiology