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Related Experiment Videos

Potential human error in setting stereotactic coordinates for radiosurgery: implications for quality assurance

J C Flickinger1, L D Lunsford, D Kondziolka

  • 1Department of Radiation Oncology, University of Pittsburgh School of Medicine, PA.

International Journal of Radiation Oncology, Biology, Physics
|September 30, 1993
PubMed
Summary

Errors in stereotactic coordinate setting for gamma knife radiosurgery occur in 12% of cases. Quality assurance, including dual observer verification, effectively identifies and corrects these common errors.

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Surgical technology international·2011

Area of Science:

  • Neurosurgery
  • Medical Physics
  • Radiation Oncology

Background:

  • Accurate stereotactic coordinate setting is crucial for precise radiation delivery in gamma knife radiosurgery.
  • Quality assurance protocols are essential to minimize errors in complex neurosurgical procedures.

Purpose of the Study:

  • To investigate the frequency of errors in setting stereotactic coordinates for gamma knife radiosurgery.
  • To determine the necessary quality assurance safeguards for stereotactic coordinate setting.

Main Methods:

  • A prospective study analyzed 200 consecutive isocenter settings for spontaneous stereotactic coordinate errors.
  • An additional 25 coordinate errors were artificially introduced among 200 settings to assess error identification.
  • Error frequency was analyzed in relation to coordinate direction and observer experience.

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Main Results:

  • Stereotactic coordinates required resetting in 12% of isocenters due to errors ranging from 0.25 mm to 20 mm.
  • Errors were significantly related to the specific coordinate set and operator experience.
  • Dual observer verification significantly reduced the probability of undetected errors, especially for larger deviations.

Conclusions:

  • Errors in stereotactic coordinate setting are common but detectable.
  • A quality assurance policy requiring verification by at least two observers ensures high confidence in accurate coordinate setting.
  • Implementing robust verification procedures is vital for patient safety in gamma knife radiosurgery.