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Numerical Approach to Facial Palsy Using a Novel Registration Method with 3D Facial Landmark.

Junsik Kim1, Hyungwha Jeong2, Jeongmok Cho2

  • 1Department of Electronic Engineering, Kwangwoon University, Seoul 01897, Korea.

Sensors (Basel, Switzerland)
|September 9, 2022
PubMed
Summary
This summary is machine-generated.

This study introduces a numerical method using 478 3D facial landmarks to quantify facial palsy progression. The approach enables objective assessment and comparison of patient recovery over time.

Keywords:
3D facial landmarkfacial palsyiterative closest pointregistrationsymmetry

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Area of Science:

  • Medical Imaging
  • Biomechanical Analysis
  • Rehabilitation Science

Background:

  • Facial palsy requires timely treatment to prevent severe complications.
  • Objective evaluation and quantitative data are crucial for effective rehabilitation.
  • Existing methods using few landmarks lack comprehensive assessment of facial palsy progression.

Purpose of the Study:

  • To develop a numerical approach for quantifying facial palsy severity using extensive 3D facial landmarks.
  • To enable objective and consistent evaluation of patient recovery over time.
  • To compare facial symmetry and landmark movement for assessing palsy progression.

Main Methods:

  • Extraction of 478 3D facial landmarks from 2D RGB images.
  • Registration techniques including scale matching, global registration, and Point-to-Plane ICP.
  • Calculation of distance symmetry, angular symmetry, and landmark movement for quantitative analysis.

Main Results:

  • The proposed numerical approach allows for objective measurement of facial palsy.
  • Symmetry and landmark movement metrics effectively assess palsy degree at different times and expressions.
  • Clinician validation confirmed the utility of the method in tracking facial palsy progression.

Conclusions:

  • The developed numerical method provides a robust tool for assessing facial palsy.
  • This approach enhances objective evaluation and aids in personalized rehabilitation strategies.
  • Accurate quantification of facial palsy progression can improve patient outcomes.