Aerodynamics, voice quality, and laryngeal image analysis of normal and pathologic voices. Current opinion in otolaryngology & head and neck surgery. [Curr Opin Otolaryngol Head Neck Surg] Journal article | | Title | Aerodynamics, voice quality, and laryngeal image analysis of normal and pathologic voices. | | Author(s) | Yumoto E | | Institution | Department of Otolaryngology-Head and Neck Surgery, Graduate School of Medicine, Kumamoto University, Japan. yumoto@gpo.kumamoto-u.ac.jp | | Source | Curr Opin Otolaryngol Head Neck Surg 2004 Jun; 12(3):166-73. | | MeSH | Humans
Image Processing, Computer-Assisted
Imaging, Three-Dimensional
Kymography
Laryngoscopy
Phonation
Photic Stimulation
Pulmonary Ventilation
Reference Values
Tomography, X-Ray Computed
User-Computer Interface
Video Recording
Vocal Cord Paralysis
Vocal Cords
Voice Disorders
Voice Quality
| | Abstract | PURPOSE OF REVIEW: The purpose of this review is to describe examinations of phonatory function and their relation to image analysis of the unilaterally immobile larynx. Special emphasis was placed on image analysis using three-dimensional endoscopic images produced from CT scans.
RECENT FINDINGS: Developments in modern image processing technique have led to the quantification of various aspects of vocal fold vibration. Stroboscopic images of the vocal fold were digitized and, subsequently, the glottal gap area, amplitude, and degree of bowing were analyzed quantitatively in relation to phonatory function. Vocal fold vibration was observed with the aid of videokymography, during which images from a single transverse line can be recorded. Successive line images were shown in real time on a monitor, with the time dimension displayed in the vertical direction. This system enabled the assessment of left-right asymmetries, open quotient, propagation of mucosal waves, and forth. Three-dimensional endoscopic images derived from multislice CT scans provided a novel method for evaluating morphologic characteristics of the laryngeal lumen in relation to phonatory function. The combination of three-dimensional endoscopy and coronal reconstructed images supplemented stroboscopic findings exemplified by differences in vertical position and thickness between the vocal folds.
SUMMARY: Depth information about the vocal fold as well as the presence of paradoxic movement of the affected vocal fold and overadduction of the healthy vocal fold during phonation should be taken into account when surgical intervention to improve hoarseness resulting from unilateral vocal fold immobility is performed. Phonatory function tests, videostroboscopy, and laryngeal image analysis are prerequisites to achieving this goal. | | Language | eng | | Pub Type(s) | Journal Article
Review
| | PubMed ID | 15167024 |
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