Comparison between thermoluminescent dosimeters and semiconductor diodes applied for in vivo dosimetry of TBI treatments
DOI:
https://doi.org/10.29384/rbfm.2023.v17.19849001707Keywords:
TBI, Semiconductor Diodes, TLD, Thermoluminescent, In Vivo DosimetryAbstract
This paper presents a quantitative comparison between thermoluminescent dosimeters (TLD) and semiconductor diodes
applied for in vivo dosimetry of total body irradiation (TBI) treatments. Measurements were performed in order to express
the detectors ability to estimate the absorbed dose on the central axis of a solid water phantom, using two different
calculation methods. The first method uses the average of the dose values at the entrance and exit surfaces of the
phantom to estimate the dose on its central axis. In the second method, the estimate is performed through the dose value
at the phantom entrance surface applied to an equation that considers the tissue phantom ratio (TPR) and the inverse
square law of the distance. For semiconductor diodes, average deviations of 5.1% were found for the first calculation
method and 1.6% for the second method, while for TLDs, average deviations of 1.6% were found for the first calculation
method and 2% for the second method.
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Copyright (c) 2023 Heres Lalli, Fábio Brüning, Anna Malthez, Giovana Wozniak, Carlla Oliveira, Emílio Ricardi, Melissa Funchal, Tatiane Fernandes
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