Three-Dimensional Endoscopic Images of Vocal Fold Paralysis by Computed Tomography

Abstract

The use of 3-D CT endoscopy enables description of 3-D characteristics of unilateral vocal fold paralysis and supplements stroboscopic findings. Furthermore, CT endoscopic images, when simultaneously displayed with bony densities, may help in evaluating the effects of phonosurgical treatment of the paralyzed vocal fold.

Laryngeal Muscle Activity in Unilateral Vocal Fold Paralysis Patients Using Electromyography and Coronal Reconstructed Images

“…Before the evaluation, CT endoscopic images produced with the present method coincided well with those obtained through videostroboscopic images during phonation and inhalation. 14,15 Two of the authors (TS, EY) evaluated the coronal images for each anonymous subject. Images were displayed on a monitor, and analyzed for differences in the thickness and vertical position of the vocal folds during phonation.…”

Computed tomographic assessment of the causal factors of unsuccessful medialization thyroplasty

“…Recently, three-dimensional computed tomography (3D-CT) has become an excellent tool that can be used to assess the pre-and postoperative vocal fold condition in patients with UVFP [12][13][14]. In the present study, to identify the primary cause of a poor vocal outcome due to inappropriate surgical procedures during MT in patients with UVFP, we assessed the postoperative laryngeal CT images for the following factors: the arytenoid cartilage position, window position, implant size, implant position, and the position of the corrected vocal fold.…”

Clinical feasibility of the new technique of functional 3D laryngeal CT

“…The function of the larynx and the movement of the vocal fold have been evaluated by means of various imaging procedures, such as flexible laryngeal fiberscopy, videostroboscopy, CT and MRI [1,2]. Such procedures, however, primarily provide only 2D images of the motion of the larynx, and are limited in terms of detecting the functional changes in the vocal fold according to the pitch level.…”