Proficiency Test for the Dosimetry Audit Service Provider

Abstract

The proficiency test was conducted to assess the performance of the dosimetry audit service provider in the readout practice of the dose delivered to patients in medical institutions.Methods: A certain amount of the absorbed dose to water for the high-energy X-ray from the medical linear accelerator (LINAC) installed in the Korea Research Institute of Standards and Science (KRISS) was delivered to the postal dose audit package given by the dosimetry audit service provider, in which the radio-photoluminescence (RPL) glass dosimeters were mounted. The dosimetry audit service provider read the RPL glass dosimeters and sent the readout dose value with its uncertainty to KRISS. The performance of the dosimetry audit service provider was evaluated based on the E n number given in ISO/IEC 17043:2010. Results:The evaluated E n number was −0.954. Based on the ISO/IEC 17043, the performance of the dosimetry service provider is "satisfactory."Conclusions: As part of the conformity assessment, the KRISS performed the proficiency test over the postal dose audit practice run by the dosimetry audit service provider. The proficiency test is in line with confirming the traceability of the medical institutions to the primary standard of absorbed dose to the water of the KRISS and ensuring the confidence of the dosimetry audit service provider.

Formulation of a New En Score in the Proficiency Test

“…In 2021, the KRISS performed PT over the dosimetry audit service provider for the administered dose in cancer therapy and reported the results in Progress in Medical Physics [3].…”