Radiation isodose surface distortion as a source of dose or exposure rate measurement uncertainty: Example in brachytherapy seeds
Tipo
Artigo de evento
Data de publicação
2009
Periódico
19th IMEKO World Congress 2009
Citações (Scopus)
0
Autores
Manzoli J.E.
Pirolla J.
De Moura E.S.
Zeituni C.A.
Moura J.
Rostelatto M.E.C.M.
Pirolla J.
De Moura E.S.
Zeituni C.A.
Moura J.
Rostelatto M.E.C.M.
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Resumo
Radiation sealed sources have an emission that could be studied by theirs isodose surfaces. The intersection of a plan with such a surfaces is described by the dose rate contour curves. It is very common to assume that these surfaces have rotational symmetry around the longitudinal axis, and so, the contour curves have mirror symmetries. Here it is shown, by a computational simulation, that if the radioactive material inside de sealed vessel is not homogeneous, the uncertainty in dose rate measurements could achieve high values. This uncertainty value is exemplified in a iodine-125 seed source used for brachytherapy purposes.
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Assuntos Scopus
Brachytherapy , Computational simulation , Dose rate , Dose rate measurements , Exposure rate , Iodine-125 , Isodose , Longitudinal axis , Mirror symmetry , Rotational symmetries , Sealed sources , Sealed vessels , Seed source , Surface distortion