ABSTRACT
Objective Based on the measurement of the ambient dose equivalent rate of points around the novel self-shielding Zap-X radiotherapy system, its self-shielding effect was evaluated and analyzed, and suggestions were proposed for the revision and improvement of related standards in China. Methods The ambient dose equivalent rates were measured at 15 points around the Zap-X system under 6 system operating conditions. The radiation shielding effect of the Zap-X system was evaluated according to the domestic and international radiation protection standards of radiotherapy equipment. Results Measurement of ambient dose equivalent rate and dose evaluation showed that the shielding effect of the Zap-X system met the requirements of international standards, but the dose rates at some points failed to satisfy the reference control levels in the domestic standards. Conclusion Without the shielded treatment room, the self-shielding effect of the Zap-X radiotherapy system is insufficient to meet the requirements of domestic standards for radiation safety and protection. The system should be operated in the treatment room to meet domestic standards.
ABSTRACT
The effectiveness of neonatal hyperbilirubinaemia treatment depends directly on the amount of energy emitted by light (irradiance). This cross-sectional study aimed to determine the irradiance of phototherapy equipment in maternity wards in Maceió, AL, Brazil. All equipment in use in the neonatal units in Maceió was included in the study, totaling 36 devices, except those in maintenance. The measurement of irradiance was carried out with a radiometer. We observed that 72.20 percent of the equipment presented efficient irradiance and 27.76 percent were inefficient. The conclusion is that the majority of phototherapy devices are emitting the minimum required irradiance for neonatal jaundice treatment.
La eficacia del tratamiento de la hiperbilirrubinemia neonatal depende directamente de la cantidad de energía emitida por la luz (irradiación). Este es un estudio transversal que objetivó determinar la irradiación de los aparatos de fototerapia en las maternidades de Maceió. Es un muestreo por censo, ya que incluyó todos los aparatos en uso en las unidades neonatales de Maceió, en el total de treinta y seis aparatos (36), excluyéndose aquellos que estaban en manutención. La medición de la irradiación fue realizada con un radiómetro. Se observó que 72,20 por ciento de los aparatos presentaron irradiación eficaz y 27,76 por ciento de los aparatos fueron ineficaces. Se concluye que la mayoría de los aparatos de fototerapia está emitiendo la irradiación mínima terapéutica para el tratamiento de la ictericia neonatal.
A eficácia do tratamento da hiperbilirrubinemia neonatal está na dependência direta da quantidade de energia emitida pela luz (irradiância). Este é um estudo transversal que objetivou determinar a irradiância dos aparelhos de fototerapia nas maternidades de Maceió. A amostragem foi censitária, pois incluiu todos os aparelhos em uso nas unidades neonatais de Maceió, no total de trinta e seis aparelhos (36), excluindo-se aqueles que estavam em manutenção. A medição da irradiância foi realizada com um radiômetro. Observou-se que 72,20 por cento dos aparelhos apresentaram eficácia quanto à sua irradiância e 27,76 por cento dos aparelhos foram ineficazes. Concluiu-se que a maioria dos aparelhos de fototerapia está emitindo a irradiância mínima terapêutica para o tratamento da icterícia neonatal.