UT Southwestern Voice Center Helps Launch Stroboscopy.org, a Free Online Laryngeal Stroboscopy Atlas

Shumon I. Dhar, M.D., FACS

April 16, 2026

In the field of laryngology, the primary diagnostic tool is laryngeal stroboscopy. This specialized form of video endoscopy evaluates voice function by visualizing vocal fold vibration. Most often performed by an otolaryngologist or speech-language pathologist, this technique allows for the diagnosis and management of a variety of conditions related to abnormalities in vibratory function.

There are excellent resources for learning how to perform and interpret stroboscopy. They are primarily textbooks and scientific articles. Because stroboscopy is a video-based diagnostic tool, some laryngologists believe an online resource would be a more effective learning option to serve the voice community.

The concept for Stroboscopy.org was first discussed by Shumon Dhar, M.D. (Associate Professor at the UT Southwestern Voice Center) and Bill Gao, M.D. (University of Chicago Voice Center) during a laryngology fellowship. They were inspired by Gonioscopy.org, a world-renowned, video-based learning resource for ophthalmologists. Both felt stroboscopy needed the same type of resource. However, no free, video-focused option existed for voice professionals (medical students, residents, SLPs, singing teachers, or physicians) at any stage of training and experience.

The UT Southwestern Academy of Teachers sponsored the initial effort, and a team of internationally recognized experts was assembled to serve on the resource's editorial board, including Voice Center Director Lesley Childs, M.D. (Section Editor of Benign Lesions).

The free atlas hosts high-definition videos on subjects ranging from variations in normal physiology to laryngeal manifestations of systemic disease to malignant conditions. In addition, Stroboscopy.org has a new section on the latest office procedures in laryngology.

The American Laryngological Association (ALA) has recognized Stroboscopy.org as a high-quality resource and has become the official sponsor of the project. The video atlas itself is constantly evolving, with video submissions from laryngology professionals across the globe being added monthly.