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Examination of vocal fold movement by ultra-short pulse X radiography

N. J. Noscoe, D.C.R. A. J. Fourcin, Ph.D. N. J. Brown, M.A., Ph.D. ^* and R. J. Berry, D.Phil, M.D., F.R.C.P., F.R.C.R.

Departments of Oncology, Middlesex Hospital Medical School, London ^* Departments of Oncology, Nuclear Medicine, Middlesex Hospital Medical School, London Department of Phonetics and Linguistics, University College, London

Antero-posterior radiographs of the larynx lack spatial and temporal resolution, due to the movement of the vocal folds during phonation. By utilising the electrolaryngograph to monitor vocal fold movement, single X-ray pulses of 30 nanoseconds duration have been triggered at pre-determined points during the cycle of vocal fold movement to visualise these in normal phonation.

Received for publication February 1, 1983.