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Peer-based credentialing for brachytherapy: Application in permanent seed implant.

Tyler Meyer1, Sarah Quirk1, Siraj Husain2

  • 1Department of Oncology, University of Calgary, Calgary, AB; Department of Physics and Astronomy, University of Calgary, Calgary, AB.

Brachytherapy
|May 14, 2020
PubMed
Summary

A new quantitative method for evaluating implant quality in permanent seed brachytherapy was developed. This delivery-based credentialing ensures consistent seed placement and improves patient outcomes in radiation oncology.

Keywords:
BrachytherapyCredentialingPermanent seed implantQuality assurance

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Area of Science:

  • Medical Physics
  • Radiation Oncology
  • Brachytherapy

Background:

  • Permanent seed brachytherapy requires consistent and accurate seed delivery for optimal patient outcomes.
  • Current credentialing processes may not fully capture the nuances of seed placement accuracy.
  • Standardization in brachytherapy delivery is crucial for reliable treatment outcomes.

Purpose of the Study:

  • To establish a quantitative method for implant quality evaluation in permanent seed brachytherapy.
  • To develop a delivery-based credentialing process for brachytherapy seed delivery.
  • To promote consistency and improve patient outcomes in brachytherapy.

Main Methods:

  • A workflow for delivery-based credentialing was designed and applied to permanent breast seed implant brachytherapy.
  • Delivery simulations were conducted using implantable anthropomorphic breast phantoms.
  • Two experienced institutions performed peer credentialing, evaluating seed placement accuracy across five simulations to assess implant variation.

Main Results:

  • Seed placement accuracy across two institutions was calculated as 6.1 (±2.6) mm.
  • Credentialing criteria were established using implant accuracy plus two standard deviations and seed variation plus two standard deviations, yielding a threshold of 8.1 ± 3.4 mm.
  • It is anticipated that 95% of experienced institutions will meet this threshold in phantom simulations.

Conclusions:

  • Brachytherapy programs should implement formal credentialing to validate delivery accuracy, mirroring external beam programs.
  • This quantitative implant evaluation should complement existing credentialing standards for permanent seed brachytherapy.
  • A comprehensive validation of institutional brachytherapy program quality requires integrating this new evaluation method.