Quality assurance tool for determination of position and transit time of a Co-60 source in high dose rate brachytherapy

Gustavo H Píriz; Henry G Ortega-Spina; Gabriel A González-Sprinberg

doi:10.1016/j.apradiso.2021.109971

Quality assurance tool for determination of position and transit time of a Co-60 source in high dose rate brachytherapy

Appl Radiat Isot. 2021 Dec:178:109971. doi: 10.1016/j.apradiso.2021.109971. Epub 2021 Oct 1.

Authors

Gustavo H Píriz¹, Henry G Ortega-Spina², Gabriel A González-Sprinberg²

Affiliations

¹ Facultad de Ciencias, Universidad de La República, Montevideo, 11400, Uruguay. Electronic address: ghpiriz@gmail.com.
² Facultad de Ciencias, Universidad de La República, Montevideo, 11400, Uruguay.

PMID: 34653879
DOI: 10.1016/j.apradiso.2021.109971

Abstract

In this study, three holders were designed, constructed and characterized to perform quality assurance on the source position and transit time in remote afterloading systems with Co-60 sources for high dose rate brachytherapy. The holders design focused on achieving accuracy, low cost, and a time efficient tool for use in clinical settings. Sensitivities greater than 0.6%/mm and maximum precisions better than 0.14 mm for the source position were obtained. The transit time was determined for the holders with a relative precision better than 19%.

Keywords: Brachytherapy; Cobalt-60; Quality assurance; hdr.

MeSH terms

Brachytherapy / methods*
Cobalt Radioisotopes / administration & dosage*
Dose-Response Relationship, Radiation
Humans
Neoplasms / radiotherapy*
Radiotherapy Dosage*
Uncertainty

Substances

Cobalt Radioisotopes
Cobalt-60