Mr. Jong Dae Baek Profile

Jong Dae Baek

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Proceedings Article | 8 February 2008 Paper

Stapes model using high-resolution microCT

Jong Dae Baek, Sunil Puria

Proceedings Volume 6842, 68421C (2008) https://doi.org/10.1117/12.774354

KEYWORDS: Bone, Ear, X-rays, Head, Signal attenuation, 3D image processing, 3D modeling, Tissues, Acoustics, Motion models

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Understanding the biomechanics of the middle ear is important for surgical reconstructions. As the output of the middle ear, the stapes plays a key role in transferring acoustic vibrations to the cochlea. In order to develop anatomically-based mathematical models, which are needed to improve our understanding of stapes dynamics, detailed morphometry of the stapes is required. High-resolution micro-CT imaging techniques were used to generate three-dimensional reconstructions of cadaveric temporal bones from 5 species commonly used in experimental middle ear research: the chinchilla, human (relatively mid-frequency hearing limit), cat, guinea pig, and gerbil (relatively high-frequency hearing limit). From the standard discretizations of micro-CT images and corresponding 3-D volume reconstructions, the centers of mass, principle axes, stapes head areas and stapes footplate areas were calculated. Mechanical relationships were estimated between the capitulum area and the footplate area and inter-species comparisons were performed between the cross-sectional shapes of the anterior and posterior crura. Quantitative dynamic properties were estimated from the rigid body motion calculations. The parameters estimated in this study will be useful for building biocomputational models of the stapes for a variety of species.

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