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• W2991338432 abstract "Improvements in dosimetry in preclinical radiation research facilitate the application of results to the newest radiotherapy techniques, reducing gaps that hinder translation. Currently, guidelines for small-field kV photon dosimetry of small animal irradiators have not been published, and most of the publications are based on radiochromic film dosimetry. In this study, we evaluated the performance of four detectors, three ionization chambers (ICs): (PTW Advanced Markus, PTW Semiflex 31010, PTW PinPoint-3D 31016) and one solid-state detector (PTW 60017 unshielded Diode E) regarding their suitability for relative dosimetry of the small animal radiation research platform SARRP (220 kVp). The measurements were performed in a high-resolution 3D scanning phantom, centering the detectors in the field following the in-plane and cross-plane profiles method at two depths. Depth dose curves (PDDs) and profiles were measured in water for field sizes ranging from 40 × 40 mm2 to 5 × 5 mm2. Quantitative analysis was performed through global and local dose differences (DDs) between the PDDs and the Advanced Markus parallel plate IC data and through the gamma index (γ) criteria for profiles compared against data from EBT3 films provided by the manufacturer. Compared to the Advanced Markus IC, the PDD results suggest that PinPoint-3D is suitable for depth measurements at this beam quality, even near the surface, with agreements better than 1%. Semiflex 31010 was accurate to within 1.5% for measurements deeper than 5 mm. Diode E showed a dramatic DD and should not be recommended for the field sizes and kVp evaluated in this study. In agreement with γ analyses, PinPoint-3D and Diode E are good candidates for profile measurements of field sizes from 40 × 40 mm2 to 10 × 10 mm2. For 5 × 5 mm2 profiles, only Diode E showed good results, making it a recommended detector for profile measurements." @default.
• W2991338432 created "2019-12-05" @default.
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• W2991338432 date "2020-01-13" @default.
• W2991338432 modified "2023-10-16" @default.
• W2991338432 title "Small-field dosimetry with a high-resolution 3D scanning water phantom system for the small animal radiation research platform SARRP: a geometrical and quantitative study" @default.
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• W2991338432 doi "https://doi.org/10.1088/1361-6560/ab5c47" @default.
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