Performance and use of active personal dosemeters in pulsed radiation field
Objective To compare the response capability of active personal dosimeters(APDs)in the pulse radiation field of interventional radiology,and to find APDs that can be used for dose optimization monitoring for interventional radiology staff.Methods Seven models of APDs and dose monitoring systems were tested in the following four types of radiation fields:continuous radiation field(Cs-137),single-pulse radiation field(80 kV,10 mA,10～1000 ms),multi-pulse standard radiation field(70 kV,20～500 mA,1～20 ms/pulse,frames per second 1～20),and multi-pulse scattering field(an-giography machine,irradiation field:15 cm×15 cm,22 cm×22 cm,27 cm×27 cm,angiography:65～74 kV,6.2～8.2 mA;photography:65 kV,343～479 mA).Results All APDs showed good dose responses in the continuous radiation field.The ratio of the results obtained with and without phantom was 1～1.1.In the single-pulse radiation field,DMC3000 and TruDose showed good dose response,linearity,and repeatability.Under the main ray of the multi-pulse radiation field,DMC3000 and TruDose showed good dose response,linearity,and repeatability as the dose rate increased,and there were 5%～13%differences in the response ability between the two models.In angiography machine scattering field,the ratios of the results obtained from DMC3000,TruDose,and RaySafei3 to those from thermoluminescence dosimeter were 1.08±0.09,0.95±0.11,and 1.13±0.11,respectively.Conclusion DMC3000,TruDose,and RaySafei3 can be used in clinics as auxiliary dosimeters to optimize radiation dose monitoring and radiation protection measures for people at high risk of occu-pational diseases.Interventional radiology workers can implement actions to reduce the cumulative dose based on real-time dose information,thereby reducing the radiation dose.
Active personal dosimeterPulsed radiation fieldInterventional radiologyOccupational radiation exposure
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