Micro-CT study of human laryngeal structures using phosphotungstic agent staining.

Purpose: Traditional dissection methods are primarily limited by challenges in identifying minute structures, which can lead to irreversible tissue damage. Anatomical observation of the larynx is particularly challenging in educational and clinical settings owing to its microscopic structures and complex three-dimensional (3D) nature, making it difficult to dissect. Therefore, this study aimed to demonstrate that micro-computed tomography (micro-CT) imaging of the larynx can serve as an effective alternative for educational and clinical purposes, overcoming these limitations.

Methods: Three laryngeal specimens were obtained from cadavers, stained with a phosphotungstic acid-based contrast agent, and imaged using enhanced micro-CT. The resulting images were reconstructed in three dimensions, allowing for a detailed 3D observation of the specimens.

Results: Phosphotungstic contrast-enhanced micro-CT provided comprehensive anatomical information on laryngeal structures, including muscles, nerves, arteries, and vocal folds.

Conclusion: This study demonstrates the high effectiveness of micro-CT in producing detailed structural images of the larynx, enabling 3D observation of even the smallest anatomical structures. These images can be applied in both educational and clinical settings to analyze the human larynx, effectively overcoming the limitations of traditional dissection methods. This approach facilitates the analysis of laryngeal structures that are otherwise difficult to observe with the naked eye.