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Scientific paper - Original scientific paper
On dosimetric characteristics of detectors for relative dosimetry in small fields: a multicenter experimental study
Physics in Medicine & Biology, 69 (2024), 3; 035009. https://doi.org/10.1088/1361-6560/ad154c
Casar, Božidar; Mendez, Ignasi; Gershkevitsh, Eduard; Wegener, Sonja; Jaffray, David; Heaton, Robert; Pesznyak, Csilla; Stelczer, Gabor; Bulski, Wojciech; Chełminski, Krzysztof; Smirnov, Georgiy; Antipina, Natalia; Beavis, Andrew W; Harding, Nicholas; Jurković, Slaven; Hwang, Min-Sig; Saiful Huq, M More authors...

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Casar, B., Mendez, I., Gershkevitsh, E., Wegener, S., Jaffray, D., Heaton, R. ... Saiful Huq, M. (2024). On dosimetric characteristics of detectors for relative dosimetry in small fields: a multicenter experimental study. Physics in Medicine & Biology, 69. (3). doi: 10.1088/1361-6560/ad154c

Casar, Božidar, et al. "On dosimetric characteristics of detectors for relative dosimetry in small fields: a multicenter experimental study." Physics in Medicine & Biology, vol. 69, no. 3, 2024. https://doi.org/10.1088/1361-6560/ad154c

Casar, Božidar, Ignasi Mendez, Eduard Gershkevitsh, Sonja Wegener, David Jaffray, Robert Heaton, Csilla Pesznyak, et al. "On dosimetric characteristics of detectors for relative dosimetry in small fields: a multicenter experimental study." Physics in Medicine & Biology 69, no. 3 (2024). https://doi.org/10.1088/1361-6560/ad154c

Casar, B., et al. (2024) 'On dosimetric characteristics of detectors for relative dosimetry in small fields: a multicenter experimental study', Physics in Medicine & Biology, 69(3). doi: 10.1088/1361-6560/ad154c

Casar B, Mendez I, Gershkevitsh E, Wegener S, Jaffray D, Heaton R, and sur.. On dosimetric characteristics of detectors for relative dosimetry in small fields: a multicenter experimental study. Physics in Medicine & Biology [Internet]. 2024 January 24 [cited 2025 March 28];69(3). doi: 10.1088/1361-6560/ad154c

B. Casar, et al., "On dosimetric characteristics of detectors for relative dosimetry in small fields: a multicenter experimental study", Physics in Medicine & Biology, vol. 69, no. 3, January 2024. [Online]. Available at: https://urn.nsk.hr/urn:nbn:hr:184:011915. [Accessed: 28 March 2025]

Metadata
Title (english)On dosimetric characteristics of detectors for relative dosimetry in small fields: a multicenter experimental study
AuthorBožidar Casar
AuthorIgnasi Mendez
AuthorEduard Gershkevitsh
AuthorSonja Wegener
AuthorDavid Jaffray
AuthorRobert Heaton
AuthorCsilla Pesznyak
AuthorGabor Stelczer
AuthorWojciech Bulski
AuthorKrzysztof Chełminski
AuthorGeorgiy Smirnov
AuthorNatalia Antipina
AuthorAndrew W Beavis
AuthorNicholas Harding
AuthorSlaven Jurković
AuthorMin-Sig Hwang
AuthorM Saiful Huq
Author's institutionUniversity of Rijeka
Faculty of Medicine
(Department of Medical Physics and Biophysics)
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Physics
Biophysics and Medical Physics
Abstract (english)
Objective. In this multicentric collaborative study, we aimed to verify whether the selected radiation detectors satisfy the requirements of TRS-483 Code of Practice for relative small field dosimetry in megavoltage photon beams used in radiotherapy, by investigating four dosimetric characteristics. Furthermore, we intended to analyze and complement the recommendations given in TRS-483. Approach. Short-term stability, dose linearity, dose-rate dependence, and leakage were determined for 17... More models of detectors considered suitable for small field dosimetry. Altogether, 47 detectors were used in this study across ten institutions. Photon beams with 6 and 10 MV, with and without flattening filters, generated by Elekta Versa HDTM or Varian TrueBeamTM linear accelerators, were used. Main results. The tolerance level of 0.1% for stability was fulfilled by 70% of the data points. For the determination of dose linearity, two methods were considered. Results from the use of a stricter method show that the guideline of 0.1% for dose linearity is not attainable for most of the detectors used in the study. Following the second approach (squared Pearson’s correlation coefficientr 2 ), it was found that 100% of the data fulfill the criteria r 2> 0.999 (0.1% guideline for tolerance). Less than 50% of all data points satisfied the published tolerance of 0.1% for dose-rate dependence. Almost all data points(98.2%)satisfied the 0.1% criterion for leakage. Significance. For short-term stability (repeatability), it was found that the 0.1% guideline could not be met. Therefore, a less rigorous criterion of 0.25% is proposed. For dose linearity, our recommendation is to adopt a simple and clear methodology and to define an achievable tolerance based on the experimental data. For dose-rate dependence, a realistic criterion of 1% is proposed instead of the present 0.1%. Agreement was found with published guidelines for background signal (leakage). Less
Keywords (english)
Languageenglish
Publication typeScientific paper - Original scientific paper
Publication statusPublished
Peer reviewPeer review - international
Publication versionPublished version
Journal titlePhysics in Medicine & Biology
Numberingvol. 69, no. 3, 035009
p-ISSN0031-9155
e-ISSN1361-6560
DOIhttps://doi.org/10.1088/1361-6560/ad154c
URN:NBNurn:nbn:hr:184:011915
Publication2024-01-24
Document URLhttps://iopscience.iop.org/article/10.1088/1361-6560/ad154c
Type of resourceText
Access conditionsOpen access
Terms of useLicence Attribution 4.0 International (CC BY 4.0) icon
Created on2024-02-06 14:14:27
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