Planar EPID-Based Dosimetry for SRS and SRT Patient-Specific QA

The study’s purpose was to develop and validate Electronic Portal Imaging Device (EPID)-based dosimetry for Stereotactic Radiosurgery (SRS) and Stereotactic Radiation Therapy (SRT) patient-specific Quality Assurance (QA). The co-operation between extended Source-to-Imager Distance (SID) to reduce th...

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Autores principales:	Sangutid Thongsawad, Tadchapong Chanton, Nipon Saiyo, Nuntawat Udee
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	SRS patient-specific QA EPID-based dosimetry FFF beam verification Science Q
Acceso en línea:	https://doaj.org/article/25ad4b0a301449e4881c30fa03a9db7b
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spelling	oai:doaj.org-article:25ad4b0a301449e4881c30fa03a9db7b2021-11-25T18:10:47ZPlanar EPID-Based Dosimetry for SRS and SRT Patient-Specific QA10.3390/life111111592075-1729https://doaj.org/article/25ad4b0a301449e4881c30fa03a9db7b2021-10-01T00:00:00Zhttps://www.mdpi.com/2075-1729/11/11/1159https://doaj.org/toc/2075-1729The study’s purpose was to develop and validate Electronic Portal Imaging Device (EPID)-based dosimetry for Stereotactic Radiosurgery (SRS) and Stereotactic Radiation Therapy (SRT) patient-specific Quality Assurance (QA). The co-operation between extended Source-to-Imager Distance (SID) to reduce the saturation effect and simplify the EPID-based dosimetry model was used to perform patient-specific QA in SRS and SRT plans. The four parameters were included for converting the image to dose at depth 10 cm; dose-response linearity with MU, beam profile correction, collimator scatter and water kernel. The model accuracy was validated with 10 SRS/SRT plans. The traditional diode arrays with MapCHECK were also used to perform patient-specific QA for assuring model accuracy. The 150 cm-SID was found a possibility to reduce the saturation effect. The result of model accuracy was found good agreement between our EPID-based dosimetry and TPS calculation with GPR more than 98% for gamma criteria of 3%/3 mm, more than 95% for gamma criteria of 2%/2 mm, and the results related to the measurement with MapCHECK. This study demonstrated the method to perform SRT and SRT patient-specific QA using EPID-based dosimetry in the FFF beam by co-operating between the extended SID that can reduce the saturation effect and estimate the planar dose distribution with the in-house model.Sangutid ThongsawadTadchapong ChantonNipon SaiyoNuntawat UdeeMDPI AGarticleSRS patient-specific QAEPID-based dosimetryFFF beam verificationScienceQENLife, Vol 11, Iss 1159, p 1159 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	SRS patient-specific QA EPID-based dosimetry FFF beam verification Science Q
spellingShingle	SRS patient-specific QA EPID-based dosimetry FFF beam verification Science Q Sangutid Thongsawad Tadchapong Chanton Nipon Saiyo Nuntawat Udee Planar EPID-Based Dosimetry for SRS and SRT Patient-Specific QA
description	The study’s purpose was to develop and validate Electronic Portal Imaging Device (EPID)-based dosimetry for Stereotactic Radiosurgery (SRS) and Stereotactic Radiation Therapy (SRT) patient-specific Quality Assurance (QA). The co-operation between extended Source-to-Imager Distance (SID) to reduce the saturation effect and simplify the EPID-based dosimetry model was used to perform patient-specific QA in SRS and SRT plans. The four parameters were included for converting the image to dose at depth 10 cm; dose-response linearity with MU, beam profile correction, collimator scatter and water kernel. The model accuracy was validated with 10 SRS/SRT plans. The traditional diode arrays with MapCHECK were also used to perform patient-specific QA for assuring model accuracy. The 150 cm-SID was found a possibility to reduce the saturation effect. The result of model accuracy was found good agreement between our EPID-based dosimetry and TPS calculation with GPR more than 98% for gamma criteria of 3%/3 mm, more than 95% for gamma criteria of 2%/2 mm, and the results related to the measurement with MapCHECK. This study demonstrated the method to perform SRT and SRT patient-specific QA using EPID-based dosimetry in the FFF beam by co-operating between the extended SID that can reduce the saturation effect and estimate the planar dose distribution with the in-house model.
format	article
author	Sangutid Thongsawad Tadchapong Chanton Nipon Saiyo Nuntawat Udee
author_facet	Sangutid Thongsawad Tadchapong Chanton Nipon Saiyo Nuntawat Udee
author_sort	Sangutid Thongsawad
title	Planar EPID-Based Dosimetry for SRS and SRT Patient-Specific QA
title_short	Planar EPID-Based Dosimetry for SRS and SRT Patient-Specific QA
title_full	Planar EPID-Based Dosimetry for SRS and SRT Patient-Specific QA
title_fullStr	Planar EPID-Based Dosimetry for SRS and SRT Patient-Specific QA
title_full_unstemmed	Planar EPID-Based Dosimetry for SRS and SRT Patient-Specific QA
title_sort	planar epid-based dosimetry for srs and srt patient-specific qa
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/25ad4b0a301449e4881c30fa03a9db7b
work_keys_str_mv	AT sangutidthongsawad planarepidbaseddosimetryforsrsandsrtpatientspecificqa AT tadchapongchanton planarepidbaseddosimetryforsrsandsrtpatientspecificqa AT niponsaiyo planarepidbaseddosimetryforsrsandsrtpatientspecificqa AT nuntawatudee planarepidbaseddosimetryforsrsandsrtpatientspecificqa
_version_	1718411486461689856

Planar EPID-Based Dosimetry for SRS and SRT Patient-Specific QA

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