title: Comparison of Videostroboscopy to Stroboscopy Derived From High-Speed Videoendoscopy for Evaluating Patients With Vocal Fold Mass Lesions.
abstract: Videostroboscopy (VS) uses an indirect physiological signal to predict the phase of the vocal fold vibratory cycle for sampling. Simulated stroboscopy (SS) extracts the phase of the glottal cycle directly from the changing glottal area in the high-speed videoendoscopy (HSV) image sequence. The purpose of this study is to determine the reliability of SS relative to VS for clinical assessment of vocal fold vibratory function in patients with mass lesions.
  
  
  
  VS and SS recordings were obtained from 28 patients with vocal fold mass lesions before and after phonomicrosurgery and 17 controls who were vocally healthy. Two clinicians rated clinically relevant vocal fold vibratory features using both imaging techniques, indicated their internal level of confidence in the accuracy of their ratings, and provided reasons for low or no confidence.
  
  
  
  SS had fewer asynchronous image sequences than VS. Vibratory outcomes were able to be computed for more patients using SS. In addition, raters demonstrated better interrater reliability and reported equal or higher levels of confidence using SS than VS.
  
  
  
  Stroboscopic techniques on the basis of extracting the phase directly from the HSV image sequence are more reliable than acoustic-based VS. Findings suggest that SS derived from high-speed videoendoscopy is a promising improvement over current VS systems.
authors.affiliation: Department of Communication Sciences and Disorders, University of Cincinnati, OHLaryngeal Biology Laboratory, Vanderbilt University, Nashville, TN.
authors.forename: Maria E
authors.initials: ME
authors.lastname: Powell
authors.affiliation: Department of Communicative Sciences and Disorders, Michigan State University, East Lansing.
authors.forename: Dimitar D
authors.initials: DD
authors.lastname: Deliyski
authors.affiliation: Center for Laryngeal Surgery and Voice Rehabilitation, Massachusetts General Hospital, BostonDepartment of Surgery, Harvard Medical School, Boston, MADepartment of Communication Sciences and Disorders, MGH Institute of Health Professions, Boston, MA.
authors.forename: Robert E
authors.initials: RE
authors.lastname: Hillman
authors.affiliation: Center for Laryngeal Surgery and Voice Rehabilitation, Massachusetts General Hospital, BostonDepartment of Surgery, Harvard Medical School, Boston, MA.
authors.forename: Steven M
authors.initials: SM
authors.lastname: Zeitels
authors.affiliation: Center for Laryngeal Surgery and Voice Rehabilitation, Massachusetts General Hospital, BostonDepartment of Surgery, Harvard Medical School, Boston, MA.
authors.forename: James A
authors.initials: JA
authors.lastname: Burns
authors.affiliation: Center for Laryngeal Surgery and Voice Rehabilitation, Massachusetts General Hospital, BostonDepartment of Surgery, Harvard Medical School, Boston, MADepartment of Communication Sciences and Disorders, MGH Institute of Health Professions, Boston, MA.
authors.forename: Daryush D
authors.initials: DD
authors.lastname: Mehta
mesh_terms: D006801:Humans; D007818:Laryngeal Diseases / Q000473:pathology* / Q000503:physiopathology; D007828:Laryngoscopy; D010699:Phonation; D015203:Reproducibility of Results; D049489:Stroboscopy; D014741:Video Recording; D014827:Vocal Cords / Q000473:pathology* / Q000503:physiopathology