A Methodology to Quantify the Effective Vertical Thickness of Prephonatory Vocal Fold Medial Surface.
Sarah Lehoux, Zhaoyan Zhang
PMID 39448280WHAT IT FOUND
A new way to measure vocal fold thickness from scans works best with a tiny 0.05 mm threshold.
If the midline is hard to see, assume the folds are less convergent to keep the measurement accurate.
Key findings
01A threshold distance of 0.05 mm provides the most accurate measurement of effective vocal fold thickness, matching previous studies.
02The measurement method is robust to slight errors in identifying the midline, particularly if the error makes the vocal folds appear less convergent.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
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What it does not show
The method was validated on only one canine larynx, so it is unknown how it performs across different human anatomies. The experiments were static and did not involve actual phonation, so the link to closed quotient (a measure of vocal fold vibration) was not directly tested in this study. The study used animal data, not human CT or MRI scans, to validate the geometry.
Declared interests
No conflicts of interest or funding sources were reported in the provided text.
The easy way to misread this
This is a technical validation using a single animal specimen, not a clinical study. Do not assume this measurement method is currently ready for use in human diagnosis or that it replaces existing clinical assessments of glottal closure.