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。
Objective 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 from the 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 trends 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.
出处
《中华放射医学与防护杂志》
CAS
CSCD
北大核心
2016年第12期929-934,共6页
Chinese Journal of Radiological Medicine and Protection
基金
国家科技支撑计划项目（2014BAI12804）
