
Proceedings Paper
A method for three-dimensional displacement and deformation measurement applied to the statically loaded middle ear ossiclesFormat | Member Price | Non-Member Price |
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Paper Abstract
The middle ear ossicles transmit sound from eardrum to inner ear under largely varying ambient pressure conditions. To
protect the structures within the cochlea from excessive footplate incursions the configuration of the ossicles changes
with pressure. Sequences of micro CT-scans were acquired from gerbil temporal bones under static ear canal pressures
ranging from -450 to +450 daPa. These image stacks were used to track the 3D motion and deformations of the ossicles
as a function of pressure using hyperelastic warping. Using the scans for zero pressure, accurate finite-element
reference models were generated for each of the ossicles. With the difference between these template images and the
target image data recorded in a deformed configuration as a driving force, the warping algorithm displaced and deformed
the finite-element models of the ossicles in order to align the deformed template with the target data. Position changes of
the ossicles within the middle ear cavity and deformation of the ossicles and the tympanic membrane were all measured
in a same preparation. For each static pressure load a finite-element ossicular chain model is obtained in the run and can
be used for further analysis under acoustic stimulation.
Paper Details
Date Published: 17 June 2008
PDF: 13 pages
Proc. SPIE 7098, Eighth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, 70980B (17 June 2008); doi: 10.1117/12.802971
Published in SPIE Proceedings Vol. 7098:
Eighth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications
Enrico Primo Tomasini, Editor(s)
PDF: 13 pages
Proc. SPIE 7098, Eighth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, 70980B (17 June 2008); doi: 10.1117/12.802971
Show Author Affiliations
Willem F. Decraemer, Univ. of Antwerp (Belgium)
Stefan L. Gea, Univ. of Antwerp (Belgium)
Stefan L. Gea, Univ. of Antwerp (Belgium)
Steve A. Maas, Univ. of Utah (United States)
Joris J. J. Dirckx, Univ. of Antwerp (Belgium)
Joris J. J. Dirckx, Univ. of Antwerp (Belgium)
Published in SPIE Proceedings Vol. 7098:
Eighth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications
Enrico Primo Tomasini, Editor(s)
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