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Rapid three-dimensional measuring system for facial surface structure

T Yamada1, T Sugahara, Y Mori

  • 1Second Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Osaka University, Suita, Japan.

Plastic and Reconstructive Surgery
|November 12, 1998
PubMed
Summary

A novel noncontact 3D facial scanner offers rapid, accurate measurements for infants, including those with cleft lip. This technology provides detailed facial surface data for precise analysis without sedation.

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Area of Science:

  • Medical Imaging
  • Biomedical Engineering
  • 3D Scanning Technology

Background:

  • Accurate 3D facial data is crucial for analyzing facial structure and deformities.
  • Existing 3D scanning methods can be time-consuming or require sedation for infants.
  • Noncontact methods offer advantages for pediatric applications.

Purpose of the Study:

  • To describe and validate a noncontact three-dimensional measuring system (liquid crystal range finder system).
  • To assess the system's accuracy, reliability, and repeatability for facial surface measurements.
  • To evaluate its suitability for analyzing facial structures in infants, particularly those with cleft lip.

Main Methods:

  • Developed a liquid crystal range finder system for noncontact 3D facial scanning.

Related Experiment Videos

  • Acquired over 30,000 3D facial surface points in approximately 1 second.
  • Validated system accuracy and repeatability using a calibrating apparatus and a contact-type 3D digitizer.
  • Measured facial plaster models and human faces to determine error margins.

    • Main Results:

    • The system achieved a resolution of approximately 0.4 mm.
    • Average measurement error on a facial plaster model was 0.3 mm.
    • Repeatability in measuring human faces was approximately 0.3 mm, with a total error of 0.5 mm.
    • The rapid scanning capability (1 second) eliminated the need for sedation in infants.

    Conclusions:

    • The liquid crystal range finder system provides accurate and repeatable 3D facial measurements.
    • Its speed and noncontact nature make it ideal for scanning infants, including those with cleft lip.
    • The system enables detailed qualitative and quantitative analysis of facial surface structures, aiding in the assessment of surgical outcomes.