Technical note: Temporal and thermal stability of optical response for silicone-based 3D radiochromic dosimeters.
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| Title: | Technical note: Temporal and thermal stability of optical response for silicone-based 3D radiochromic dosimeters. |
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| Authors: | Valdetaro, Lia Barbosa1,2 liabar@rm.dk, Jensen, Morten Bjørn1,2,3, Muren, Ludvig Paul1,2, Skyt, Peter Sandegaard1, Baltzer Petersen, Jørgen Breede2,3, Balling, Peter4,5 |
| Source: | Medical Physics. Apr2023, Vol. 50 Issue 4, p2560-2564. 5p. |
| Subjects: | Dosimeters, Thermal stability, Photon beams, Optical tomography, Temperature measurements |
| Abstract: | Background: Radiochromic silicone-based dosimeters are flexible 3D dosimeters, which at appropriate concentration of leucomalachite green (LMG) and curing agent are dose-rate independent for clinical photon beams. However, their dose response is based on chemical processes that can be influenced by temporal and thermal conditions, impacting measurement stability. Purpose: The aim of this study was to investigate the temporal stability of the dose response of radiochromic dosimeters for different curing times and postirradiation storage temperatures. Methods:Six cylindrical dosimeters (5 cm diameter,5 cm length) were produced in a single batch and separated into two groups that were irradiated 72 and 118 h after production. The same photon plan, consisting of two 10 × 1.6 cm2 opposing fields, was delivered to all dosimeters. After irradiation,the dosimeters were separated into three groups, stored at 5◦C, 15◦C, and 20◦C, and read out for five consecutive days. Results: Storage temperature influenced the measurement stability, and changes in the optical response with time differed between irradiated and nonirradiated parts of the dosimeters. The relative change between signal and background was greater than 10% for all measurements performed 24 h or more after irradiation, except for dosimeters stored at 5◦C, which changed by 2%–5% after 24 h.The dosimeter temporal stability was not influenced by curing time. Conclusions: For room temperature storage (15◦C and 20◦C), readout should take place as soon as possible after irradiation since the background color increased rapidly for both curing times (72 and 118 h), whereas the dosimeters are stored at 5◦C, readout can be performed up to 24 h after. [ABSTRACT FROM AUTHOR] |
| Copyright of Medical Physics is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Items | – Name: Title Label: Title Group: Ti Data: Technical note: Temporal and thermal stability of optical response for silicone-based 3D radiochromic dosimeters. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Valdetaro%2C+Lia+Barbosa%22">Valdetaro, Lia Barbosa</searchLink><relatesTo>1,2</relatesTo><i> liabar@rm.dk</i><br /><searchLink fieldCode="AR" term="%22Jensen%2C+Morten+Bjørn%22">Jensen, Morten Bjørn</searchLink><relatesTo>1,2,3</relatesTo><br /><searchLink fieldCode="AR" term="%22Muren%2C+Ludvig+Paul%22">Muren, Ludvig Paul</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Skyt%2C+Peter+Sandegaard%22">Skyt, Peter Sandegaard</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Baltzer+Petersen%2C+Jørgen+Breede%22">Baltzer Petersen, Jørgen Breede</searchLink><relatesTo>2,3</relatesTo><br /><searchLink fieldCode="AR" term="%22Balling%2C+Peter%22">Balling, Peter</searchLink><relatesTo>4,5</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Medical+Physics%22">Medical Physics</searchLink>. Apr2023, Vol. 50 Issue 4, p2560-2564. 5p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Dosimeters%22">Dosimeters</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+stability%22">Thermal stability</searchLink><br /><searchLink fieldCode="DE" term="%22Photon+beams%22">Photon beams</searchLink><br /><searchLink fieldCode="DE" term="%22Optical+tomography%22">Optical tomography</searchLink><br /><searchLink fieldCode="DE" term="%22Temperature+measurements%22">Temperature measurements</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Background: Radiochromic silicone-based dosimeters are flexible 3D dosimeters, which at appropriate concentration of leucomalachite green (LMG) and curing agent are dose-rate independent for clinical photon beams. However, their dose response is based on chemical processes that can be influenced by temporal and thermal conditions, impacting measurement stability. Purpose: The aim of this study was to investigate the temporal stability of the dose response of radiochromic dosimeters for different curing times and postirradiation storage temperatures. Methods:Six cylindrical dosimeters (5 cm diameter,5 cm length) were produced in a single batch and separated into two groups that were irradiated 72 and 118 h after production. The same photon plan, consisting of two 10 × 1.6 cm2 opposing fields, was delivered to all dosimeters. After irradiation,the dosimeters were separated into three groups, stored at 5◦C, 15◦C, and 20◦C, and read out for five consecutive days. Results: Storage temperature influenced the measurement stability, and changes in the optical response with time differed between irradiated and nonirradiated parts of the dosimeters. The relative change between signal and background was greater than 10% for all measurements performed 24 h or more after irradiation, except for dosimeters stored at 5◦C, which changed by 2%–5% after 24 h.The dosimeter temporal stability was not influenced by curing time. Conclusions: For room temperature storage (15◦C and 20◦C), readout should take place as soon as possible after irradiation since the background color increased rapidly for both curing times (72 and 118 h), whereas the dosimeters are stored at 5◦C, readout can be performed up to 24 h after. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Medical Physics is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1002/mp.16193 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 5 StartPage: 2560 Subjects: – SubjectFull: Dosimeters Type: general – SubjectFull: Thermal stability Type: general – SubjectFull: Photon beams Type: general – SubjectFull: Optical tomography Type: general – SubjectFull: Temperature measurements Type: general Titles: – TitleFull: Technical note: Temporal and thermal stability of optical response for silicone-based 3D radiochromic dosimeters. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Valdetaro, Lia Barbosa – PersonEntity: Name: NameFull: Jensen, Morten Bjørn – PersonEntity: Name: NameFull: Muren, Ludvig Paul – PersonEntity: Name: NameFull: Skyt, Peter Sandegaard – PersonEntity: Name: NameFull: Baltzer Petersen, Jørgen Breede – PersonEntity: Name: NameFull: Balling, Peter IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 04 Text: Apr2023 Type: published Y: 2023 Identifiers: – Type: issn-print Value: 00942405 Numbering: – Type: volume Value: 50 – Type: issue Value: 4 Titles: – TitleFull: Medical Physics Type: main |
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