RESUMO
Area monitoring is a fundamental test at radiodiagnostic facilities to maintain an acceptable level of radiation exposure for employees and members of the public. Experimental measurements were taken in an ionising radiation calibration laboratory. Four area monitor instruments were used. Dose and dose rate measurements were measured in integrated and rate operating modes. The results show that precautions are necessary where the area monitor uses exposure times of ≤2 s. When taking measurements in rate mode for times ≤2 s, the area monitors evaluated show a tendency to underestimate dose rate, the inaccuracy was 41 %, and varied between 34 and 45 % for different energies. It is highly recommendable to work in integrated mode, inaccuracy varied from 2 to 35 %. For measurements taken with exposure times of ≥3 s, the average inaccuracy was 15 % and the range was between 2 and 41 %.
Assuntos
Monitoramento de Radiação/métodos , Radiologia/métodos , Radioterapia/métodos , Calibragem , Humanos , Pressão , Radiação Ionizante , Reprodutibilidade dos Testes , Temperatura , Fatores de Tempo , Raios XRESUMO
Os autores apresentam algumas modificacoes empregadas no metodo de cirurgia ambulatorial em pediatria, com enfase na simplificacao e seguranca, chamando atencao para os principios basicos na sua implantacao e manuntencao