A dynamic 3D model of the hyoid muscles

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A dynamic 3D model of the hyoid muscles

• Yihe Zu1, Adrienne Perlman1, Brad Sutton2, Zhenyu
  Yang3
• Department of Speech and Hearing Science1
• Department of Bioengineering Science2
• University of Illinois at Urbana-Champaign
• School of Computing and Information Sciences3
• Florida International University

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Introduction

• Surgery is one of the traditional treatments for
  head and neck cancer.
• However, speech and swallow function changes
  after surgery.

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Introduction

• Dysphagia may cause lung fibrosis, aspiration
  pneumonia, and laryngospasm each of which can
  result in death.
• Successfully overcoming this issue requires ENT
  surgeons to be able to predict the functional
  changes in speech, swallowing, and breathing
  after reconstructing the head and neck structures
  that remain post cancer surgery.

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Introduction

• In this study, a 3D dynamic model of the supra
  and infra-hyoid muscles was developed to provide
  information relative to the extent of muscle
  contraction
• The model is based on still 3D and dynamic dry
  swallow MRI.

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Methodology

• 3D static MR images of the head and neck area
  were obtained using SIEMENS, Trio Tim, 3T scans.
• Dynamic MR images were obtained at a temporal
  resolution of 60 ms, and the sequence used was
  turbo-FLASH.
• Four dry swallows were captured from one subject
• These were then averaged

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Methodology

• Amira 4.1 was used to reconstruct 3D polygonal
  meshes of the hyoid muscles, hyoid bone,
  mandible, vocal tract, vertebral bodies, and CNS.
  
• By mapping the dynamic MRI of the swallow, the
  muscle meshes were reshaped to generate a 3D
  movie of swallowing using Alias Maya 8.5.

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Results 1
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Discussion

• MRI provides high quality soft tissue
  information.
• 3D modeling using MRI provides muscle
  information in situ.
• The dynamic movie creates the opportunity for
  researchers and physicians to observe anatomical
  changes in all coordinate planes.
• The model will eventually include forces that
  will animate predictive functional changes after
  surgical reconstruction.

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