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Proceedings Article

Ophthalmologic diagnostic tool using MR images for biomechanically-based muscle volume deformation

[+] Author Affiliations
Michael Buchberger, Thomas Kaltofen

Upper Austrian Research (Austria) and Upper Austrian Polytechnic Univ. (Austria)

Proc. SPIE 5032, Medical Imaging 2003: Image Processing, 60 (May 16, 2003); doi:10.1117/12.480188
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From Conference Volume 5032

  • Medical Imaging 2003: Image Processing
  • Milan Sonka; J. Michael Fitzpatrick
  • San Diego, CA | February 15, 2003

abstract

We would like to give a work-in-progress report on our ophthalmologic diagnostic software system which performs biomechanically-based muscle volume deformations using MR images. For reconstructing a three-dimensional representation of an extraocular eye muscle, a sufficient amount of high resolution MR images is used, each representing a slice of the muscle. In addition, threshold values are given, which restrict the amount of data used from the MR images. The Marching Cube algorithm is applied to the polygons, resulting in a 3D representation of the muscle, which can efficiently be rendered. A transformation to a dynamic, deformable model is applied by calculating the center of gravity of each muscle slice, approximating the muscle path and subsequently adding Hermite splines through the centers of gravity of all slices. Then, a radius function is defined for each slice, completing the transformation of the static 3D polygon model. Finally, this paper describes future extensions to our system. One of these extensions is the support for additional calculations and measurements within the reconstructed 3D muscle representation. Globe translation, localization of muscle pulleys by analyzing the 3D reconstruction in two different gaze positions and other diagnostic measurements will be available.

© (2003) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Michael Buchberger and Thomas Kaltofen
"Ophthalmologic diagnostic tool using MR images for biomechanically-based muscle volume deformation", Proc. SPIE 5032, Medical Imaging 2003: Image Processing, 60 (May 16, 2003); doi:10.1117/12.480188; http://dx.doi.org/10.1117/12.480188


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