Hu Panpan, Kong Yan, Chen Bo, Liu Qianqian, Zhuo Weihai, Liu Haikuan
Institute of Radiation Medicine, Fudan University, 2094 Xietu Road, Shanghai 200032, China.
Fudan University Shanghai Cancer Center, Shanghai 200032, China.
Radiat Prot Dosimetry. 2017 Apr 20;174(1):136-140. doi: 10.1093/rpd/ncw098.
To study the shielding effect of radiologists' eye lens with lead glasses of different equivalent thicknesses and sizes in interventional radiology procedures. Using the human voxel phantom with a more accurate model of the eye and MCNPX software, eye lens doses of the radiologists who wearing different kinds of lead glasses were simulated, different beam projections were taken into consideration during the simulation. Measurements were also performed with the physical model to verify simulation results. Simulation results showed that the eye lens doses were reduced by a factor from 3 to 9 when wearing a 20 cm2-sized lead glasses with the equivalent thickness ranging from 0.1 to 1.0 mm Pb. The increase of dose reduction factor (DRF) was not significant whenever increase the lead equivalent of glasses of which larger than 0.35 mm. Furthermore, the DRF was proportional to the size of glass lens from 6 to 30 cm2 with the same lead equivalent. The simulation results were in well agreements with the measured ones. For more reasonable and effective protection of the eye lens of interventional radiologists, a pair of glasses with a lead equivalent of 0.5 mm Pb and large-sized (at least 27 cm2 per glass) lens are recommended.
研究不同等效厚度和尺寸的铅眼镜在介入放射学操作中对放射科医生晶状体的防护效果。使用具有更精确眼部模型的人体体模和MCNPX软件，模拟佩戴不同种类铅眼镜的放射科医生的晶状体剂量，模拟过程中考虑了不同的射束投影。还使用物理模型进行测量以验证模拟结果。模拟结果表明，佩戴等效厚度为0.1至1.0毫米铅当量、面积为20平方厘米的铅眼镜时，晶状体剂量降低了3至9倍。当眼镜的铅当量大于0.35毫米时，剂量降低因子（DRF）的增加并不显著。此外，在相同铅当量下，DRF与面积从6至30平方厘米的眼镜镜片大小成正比。模拟结果与测量结果吻合良好。为更合理有效地保护介入放射科医生的晶状体，建议佩戴一副铅当量为0.5毫米铅、大尺寸（每片镜片至少27平方厘米）的眼镜。
