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Utility of helical computed tomography in the study of arytenoid dislocation and arytenoid subluxation.
Annals of Otology, Rhinology, and Laryngology 1997 December
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.
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