open access

Vol 72, No 2 (2022)
Research paper (original)
Published online: 2022-02-14
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Dose estimation in patients treated with radiotherapy for SARS-COVID disease based on EPID measurement

Krzysztof Ślosarek12, Tomasz Rutkowski1, Adam Gądek1, Łukasz Sroka1, Łukasz Dolla1, Roman Rutkowski12, Jerzy Jaroszkiewicz
DOI: 10.5603/NJO.a2022.0013
·
Nowotwory. Journal of Oncology 2022;72(2):67-73.
Affiliations
  1. National Research Institute of Oncology, Gliwice Branch, Gliwice, Poland
  2. Varian Medical Systems, Warsaw, Poland

open access

Vol 72, No 2 (2022)
Original article
Published online: 2022-02-14

Abstract

Introduction.COVID radiotherapy requires performance of all radiotherapy (RT) procedures during one site visit due to the infectious nature of the disease. The aim of the study was to develop methods of estimating the delivered dose based on electronic portal image device (EPID) signal during treatment.

Material and methods.Electronic portal image device signal was measured as a function of the phantom dose. The dose in 14 COVID patients was estimated for two X6MV beams.

Results.The method allows to estimate dose in phantom with uncertainty of 12%. In this case, a systematic error was reported. Therefore, coefficients for clinical data were calculated and used to determine the dose in patients. The mean difference between the dose calculated and the dose measured for the 14 patients was 1%, but the uncertainty of this method was estimated as ±6%

Conclusions.The proposed method may be useful in clinical practice as in vivo method. However, due to high uncer­tainty, it should be dedicated to the detection of “big” errors.

Abstract

Introduction.COVID radiotherapy requires performance of all radiotherapy (RT) procedures during one site visit due to the infectious nature of the disease. The aim of the study was to develop methods of estimating the delivered dose based on electronic portal image device (EPID) signal during treatment.

Material and methods.Electronic portal image device signal was measured as a function of the phantom dose. The dose in 14 COVID patients was estimated for two X6MV beams.

Results.The method allows to estimate dose in phantom with uncertainty of 12%. In this case, a systematic error was reported. Therefore, coefficients for clinical data were calculated and used to determine the dose in patients. The mean difference between the dose calculated and the dose measured for the 14 patients was 1%, but the uncertainty of this method was estimated as ±6%

Conclusions.The proposed method may be useful in clinical practice as in vivo method. However, due to high uncer­tainty, it should be dedicated to the detection of “big” errors.

Get Citation

Keywords

SARS-COVID; EPID; fluence map; QA; in-vivo dosimetry

About this article
Title

Dose estimation in patients treated with radiotherapy for SARS-COVID disease based on EPID measurement

Journal

Nowotwory. Journal of Oncology

Issue

Vol 72, No 2 (2022)

Article type

Research paper (original)

Pages

67-73

Published online

2022-02-14

Page views

417

Article views/downloads

72

DOI

10.5603/NJO.a2022.0013

Bibliographic record

Nowotwory. Journal of Oncology 2022;72(2):67-73.

Keywords

SARS-COVID
EPID
fluence map
QA
in-vivo dosimetry

Authors

Krzysztof Ślosarek
Tomasz Rutkowski
Adam Gądek
Łukasz Sroka
Łukasz Dolla
Roman Rutkowski
Jerzy Jaroszkiewicz

References (23)
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