Physically consistent registration of extraocular muscle models from MRI

Area of Science:

• Biomechanics
• Medical Imaging
• Computational Modeling

Background:

• Accurate subject-specific orbital models are crucial for understanding extraocular muscle function and eye movement biomechanics.
• Medical imaging, particularly MRI, allows capturing orbital structures across different eye gazes.

Purpose of the Study:

• To develop a method for integrating estimated extraocular muscle material properties into orbital surface reconstruction.
• To achieve consistent parameterization of orbital models across various gazes.
• To generate anatomically accurate and physically meaningful orbital models for biomechanical simulations.

Main Methods:

• Integrating estimated material properties of extraocular muscles during surface reconstruction.
• Solving a constrained optimization problem to generate parametric surfaces.
• Discretizing models in corresponding deformed material coordinates for consistency with tissue deformation.

Main Results:

• Generation of anatomically accurate and physically meaningful orbital models.
• Models are consistent with real tissue deformation across different gazes.
• Direct provision of material correspondences simplifies model usage.

Conclusions:

• The proposed method enables the creation of subject-specific orbital models with integrated material properties.
• These models facilitate biomechanical simulations and inverse model parameter estimation.
• This approach enhances the understanding of eye movement mechanisms.