Metodologia para caracterização dosimétrica e curvas de isodoses de fontes de braquiterapia emissoras gama

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

This work presents a methodology for the dosimetric characterization of 125I brachytherapy sealed sources. Since the dosimetric characterization of a source is an attribution of both the manufacturer and the user, a calibration certificate needs to be provided by the manufacturer to the user - clinical, hospitals and secondary laboratories. It is an obligation of the user to check the values with specific tests before using the referred sources in patients or research. The air kerma strength for 125I sources model 6711 manufactured by OncoSeed were experimentally verified by means of a dosimetric set-up composed by a well chamber model HDR Plus 1000, manufactured by Standard Imaging and an electrometer model Max 4001 of the same manufacturer. The set-up was commissioned by means of current leakage tests, reproducibility and repetitively tests, positioning tests and linearity. At last, a crossed calibration of the dosimetric set up and the exactness test. On the next stage, isodoses curves were determined by means of measurements in radiochromic and dosimetric films. A methodology to evaluate the uncertainties of the measurements of the referred sources is also presented.

ASSUNTO(S)

radiation doses fisica nuclear iodine 125 doses de radiação iodo 125 dosimetria braquiterapia dosimetry

ACESSO AO ARTIGO

Documentos Relacionados