Metodologia de controle de qualidade e implantação de campos padrões de radiação X, nível  mamografia, seguindo a norma IEC 61267 / Quality control methodology and implementation of X-radiation standards beams, mammography level, following the standard IEC 61267

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

24/11/2010

RESUMO

In this work it was developed and applied a quality control program of the Xradiation system (160 kV, constant potential, target of tungsten) of the Calibration Laboratory of IPEN(LCI) in the energy range relative to mammography beams (from 25 kV to 35 kV). The X radiation standards beams, level mammography, using molybdenum and aluminum as additional filtration, were established after the application of this quality control program following national and international recommendations. The reference ionization chamber has traceability to PTB and was regularly submitted to quality control tests for evaluation and analysis of its performance. The radiation qualities emerging from the X-radiation assembly (RQR-M), based on a phantom made up of an aluminum added filter (RQA-M), narrow beam condition (RQN-M) and broad beam condition (RQB-M), following the recommendations of the international standard IEC 61267 (2005) and the IAEA code of practice, TRS 457 (2007) were established. For the implantation of RQN-M and RQB-M radiation qualities, two mammography phantoms were developed. The half-value layers found are those presented by the German primary laboratory PTB, and varied from 0.35 to 1.21 mmAl. The air kerma rates were obtained for all the 15 implanted qualities.

ASSUNTO(S)

radiodiagnóstico radiation qualities calibração de instrumentos instruments calibration mammography mamografia qualidades de radiação

ACESSO AO ARTIGO

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