摘要目的 探索直读式剂量计测量介入职业人员眼晶状体剂量的方法,实现介入职业人员眼晶状体实时剂量的监测和高剂量率报警,为介入职业人员眼晶状体剂量监控和放射防护的改进提供科学依据.方法 选用直读式电子剂量计,以眼晶状体个人剂量当量HP(3)对其刻度.选择包括单X射线管和双X射线管在内的5台数字减影血管造影(DSA)设备,对心脑血管介入手术中5种介入手术类型的介入人员眼晶状体剂量进行实时测读.对直读式剂量计测读结果进行统计分析,并与同种手术类型的热释光剂量计(TLD)测读结果进行比较.结果 经眼晶状体HP(3)刻度,直读式剂量计线性拟合度较好,且变异系数＜5％.测量冠状动脉造影和脑部支架植入术第一术者眼晶状体HP(3)平均值,直读式剂量计测得值分别为12.0和24.5 μSv,TLD测得值分别为11.9和22.7 μSv.直读式剂量计与TLD测得剂量趋势吻合.直读式剂量计可获得单例手术中介入职业人员眼晶状体受照剂量,并对其眼晶状体剂量率进行实时监测.结论 直读式剂量计测量眼晶状体剂量的刻度方法可行,测读结果可用于介入职业人员眼晶状体剂量实时监测.

abstractsObjective To establish the methods for measuring the dose to occupational staff's eye lens in interventional procedures with direct-reading dosimeters,and to realize the real-time monitoring of eye lens dose and warning for high dose rate,thus providing the scientific basis of the staff radiological protection in interventional procedures.Methods Direct-reading dosimeters were calibrated with personal dose equivalent HP (3).The eye lens doses for occupational staff in different kinds of interventional procedures were measured by the devices with both single-and double X-ray tubes.The data obtained fromthe direct-reading dosimeters was compared to those obtained from TLDs.Results Direct-reading dosimeters showed good linear fitting with the calibration of HP (3),and the coefficients of variation were lower than 5％.The average eye lens HP (3) for the main operator in coronary arteriography and stent implantation in brain obtained by direct-reading dosimeters were 12.0 and 24.5 μSv,respectively,whereas those obtained by TLDs were 11.9 and 22.7 μSv,respectively.The direct-reading dosimeters gave similar t~nds as TLDs do so.The direct-reading dosimeters were able to provide eye lens HP (3) in each individual interventional procedure,and to monitor the real-time dose rate as well.Conclusions The calibration of HP (3) and the data gained by direct-reading dosimeters are reliable.Therefore,the methods for real-time measurement of eye lens dose for occupational staff in interventional procedures are successfully established.