Online Recombination Correction in Dosimetry with Arrays of Ionization Chambers: Application to FFF and UHDR Radiotherapy

Recombination of charge carriers can affect the response of ionization detectors used for the dosimetry of radiotherapy fields. In this work, we present a method for correcting online the recombination effects in arrays of ionization chambers irradiated with time-varying dose rates. The method is ba...

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Autores principales:	Juan Pardo-Montero, Jose Paz-Martín, Luis Brualla-Gónzalez, Faustino Gómez
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	recombination ionization chamber FFF UHDR Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/21ed8dbe01ea43e78a428163950d3741
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id	oai:doaj.org-article:21ed8dbe01ea43e78a428163950d3741
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spelling	oai:doaj.org-article:21ed8dbe01ea43e78a428163950d37412021-11-11T15:09:09ZOnline Recombination Correction in Dosimetry with Arrays of Ionization Chambers: Application to FFF and UHDR Radiotherapy10.3390/app1121100832076-3417https://doaj.org/article/21ed8dbe01ea43e78a428163950d37412021-10-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/21/10083https://doaj.org/toc/2076-3417Recombination of charge carriers can affect the response of ionization detectors used for the dosimetry of radiotherapy fields. In this work, we present a method for correcting online the recombination effects in arrays of ionization chambers irradiated with time-varying dose rates. The method is based on the characterization of the dose rate/recombination response of the detector, and the measurement of the instant ionization current in the detector, rather than the integrated charge. The proposed method was investigated with simulations of the response of different air and liquid ionization chambers in situations where recombination can be large. In addition, we experimentally investigated the application of the method with an in-house-developed liquid-filled ionization chamber. The proposed online correction method can compensate for recombination losses and seems feasible to implement in the software of ionization arrays/detectors used for the dosimetry of radiotherapy fields.Juan Pardo-MonteroJose Paz-MartínLuis Brualla-GónzalezFaustino GómezMDPI AGarticlerecombinationionization chamberFFFUHDRTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 10083, p 10083 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	recombination ionization chamber FFF UHDR Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	recombination ionization chamber FFF UHDR Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Juan Pardo-Montero Jose Paz-Martín Luis Brualla-Gónzalez Faustino Gómez Online Recombination Correction in Dosimetry with Arrays of Ionization Chambers: Application to FFF and UHDR Radiotherapy
description	Recombination of charge carriers can affect the response of ionization detectors used for the dosimetry of radiotherapy fields. In this work, we present a method for correcting online the recombination effects in arrays of ionization chambers irradiated with time-varying dose rates. The method is based on the characterization of the dose rate/recombination response of the detector, and the measurement of the instant ionization current in the detector, rather than the integrated charge. The proposed method was investigated with simulations of the response of different air and liquid ionization chambers in situations where recombination can be large. In addition, we experimentally investigated the application of the method with an in-house-developed liquid-filled ionization chamber. The proposed online correction method can compensate for recombination losses and seems feasible to implement in the software of ionization arrays/detectors used for the dosimetry of radiotherapy fields.
format	article
author	Juan Pardo-Montero Jose Paz-Martín Luis Brualla-Gónzalez Faustino Gómez
author_facet	Juan Pardo-Montero Jose Paz-Martín Luis Brualla-Gónzalez Faustino Gómez
author_sort	Juan Pardo-Montero
title	Online Recombination Correction in Dosimetry with Arrays of Ionization Chambers: Application to FFF and UHDR Radiotherapy
title_short	Online Recombination Correction in Dosimetry with Arrays of Ionization Chambers: Application to FFF and UHDR Radiotherapy
title_full	Online Recombination Correction in Dosimetry with Arrays of Ionization Chambers: Application to FFF and UHDR Radiotherapy
title_fullStr	Online Recombination Correction in Dosimetry with Arrays of Ionization Chambers: Application to FFF and UHDR Radiotherapy
title_full_unstemmed	Online Recombination Correction in Dosimetry with Arrays of Ionization Chambers: Application to FFF and UHDR Radiotherapy
title_sort	online recombination correction in dosimetry with arrays of ionization chambers: application to fff and uhdr radiotherapy
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/21ed8dbe01ea43e78a428163950d3741
work_keys_str_mv	AT juanpardomontero onlinerecombinationcorrectionindosimetrywitharraysofionizationchambersapplicationtofffanduhdrradiotherapy AT josepazmartin onlinerecombinationcorrectionindosimetrywitharraysofionizationchambersapplicationtofffanduhdrradiotherapy AT luisbruallagonzalez onlinerecombinationcorrectionindosimetrywitharraysofionizationchambersapplicationtofffanduhdrradiotherapy AT faustinogomez onlinerecombinationcorrectionindosimetrywitharraysofionizationchambersapplicationtofffanduhdrradiotherapy
_version_	1718437109828681728

Online Recombination Correction in Dosimetry with Arrays of Ionization Chambers: Application to FFF and UHDR Radiotherapy

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