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Craniofacial computed tomography scanning: technology, applications and future trends.

M W Vannier1

  • 1Department of Radiology, University of Iowa, Iowa City, IA 52242, USA. michael-vannier@uiowa.edu

Orthodontics & Craniofacial Research
|November 11, 2003
PubMed
Summary

Dedicated craniofacial cone-beam computed tomography (CT) scanners offer a lower-cost alternative to medical CT. While differing in technical performance, these specialized CT scanners are valuable for craniofacial imaging applications.

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Area of Science:

  • Medical Imaging Technology
  • Radiology
  • Biomedical Engineering

Background:

  • Three-dimensional craniofacial imaging relies heavily on computed tomography (CT) technologies.
  • Advancements in medical CT scanners include multi-slice capabilities and rapid rotation times.

Purpose of the Study:

  • To explain the state-of-the-art in both medical and dedicated craniofacial cone-beam CT scanners.
  • To delineate the technological differences between medical and specialized craniofacial CT systems.

Main Methods:

  • Survey of current medical CT scanner technologies, including 16-slice models with subsecond rotation.
  • Contrastive analysis of medical CT scanners and dedicated low-cost craniofacial cone-beam CT scanners.
  • Tabulation and explanation of component differences impacting scanner performance.

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Main Results:

  • CT scanner performance is primarily determined by detectors and reconstruction algorithms.
  • Key differences exist between medical and low-cost cone-beam scanners in X-ray source, dose utilization, electronics, and software.
  • Dedicated craniofacial CT scanners exhibit compromises in technical performance compared to medical CT.

Conclusions:

  • Low-cost craniofacial CT scanners are distinct from general-purpose medical CT scanners.
  • Despite limitations, craniofacial CT scanners are highly useful for their specific applications.
  • Future improvements in craniofacial CT performance are anticipated with advancements in computing power.