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Spatial Motion of Arytenoid Cartilage Using Dynamic Computed Tomography Combined with Euler Angles
Yanli Ma1, Huijing Bao2, Xi Wang2
1Department of ENT, Zhongshan Hospital Xiamen University, Xiamen, Fujian, China.
The Laryngoscope
|December 25, 2019
Summary
Dynamic computed tomography effectively captures arytenoid cartilage motion during breathing and phonation. This method quantifies spatial laryngeal movements, aiding in understanding voice production and related disorders.
Area of Science:
- Laryngology
- Biomechanics
- Medical Imaging
Background:
- The arytenoid cartilage is crucial for vocal fold function.
- Understanding its spatial motion is key to diagnosing laryngeal disorders.
Purpose of the Study:
- To assess the feasibility of dynamic computed tomography (DCT) for analyzing arytenoid cartilage spatial motion.
- To quantitatively describe arytenoid cartilage movement during respiration and phonation.
Main Methods:
- Dynamic computed tomography (DCT) was used to record real-time arytenoid cartilage motion.
- A stationary and motion coordinate system were established for Euler angle calculation.
- Spatial motion characteristics were quantitatively analyzed using coordinate transformation.
Main Results:
- During inspiration, arytenoid cartilage showed primarily superior displacement (1-2 mm).
- During phonation, significant superior (5-8 mm), inferior, anterior, and medial displacements occurred.
- Arytenoid cartilage exhibited medial rolling (20-40 degrees) and anterior-posterior tilting (15-20 degrees) during phonation.
Conclusions:
- Dynamic computed tomography (DCT) is a feasible method for recording arytenoid cartilage motion.
- DCT combined with Euler transformations provides a quantitative tool for studying laryngeal structures' spatial dynamics.
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