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Image-guided surgery: what is the accuracy?

Robert F Labadie1, Bryan M Davis, J Michael Fitzpatrick

  • 1Department of Otolaryngology-Head and Neck Surgery, Vanderbilt University Medical Center, Nashville, Tennessee 37232-2559, USA. robert.labadie@vanderbilt.edu

Current Opinion in Otolaryngology & Head and Neck Surgery
|January 18, 2005
PubMed
Summary
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Image-guided surgery (IGS) systems in rhinology typically achieve mean accuracies of 2 mm or less. However, surgeons should understand that actual errors can vary, with potential for outliers beyond the reported mean accuracy.

Area of Science:

  • Otolaryngology
  • Surgical Technology
  • Medical Imaging

Background:

  • Image-guided surgery (IGS) systems are increasingly utilized in otolaryngology, especially rhinology.
  • Understanding the accuracy and inherent error of these systems is crucial for safe and effective surgical practice.

Purpose of the Study:

  • To review the error associated with image-guided surgery (IGS) systems used in otolaryngology.
  • To discuss a standardized method for reporting IGS system errors, drawing from engineering literature.
  • To analyze the error of currently available commercial IGS systems.

Main Methods:

  • Review of commercially available image-guided surgery (IGS) systems, focusing on those commonly used in rhinology.
  • Application of a standardized error reporting technique from engineering literature.

Related Experiment Videos

  • Analysis of reported accuracy data for skin-conforming IGS systems.

    • Main Results:

    • Most common IGS systems in rhinology report mean accuracies of 2 mm or less, irrespective of fiducial marker type.
    • Significant variability exists in the reporting of system specifications and error margins due to proprietary algorithms.
    • Lack of standardization in error reporting hinders direct comparison between different IGS systems.

    Conclusions:

    • While mean accuracies of 2 mm or less are common for IGS systems in rhinology, this represents an average.
    • Surgeons must account for the distribution of errors, as 95% of the time errors may be up to approximately 1.7 times the mean.
    • Outliers in error can occur, and IGS systems should augment, not replace, surgical anatomical knowledge.