TH-AB-201-08: Eye Lens Dose Reduction of Radiologists in Interventional Procedures with Lead Glasses

Abstract

Purpose: To study and compare the shielding effect of radiologists’eye lens exposure with lead glasses of different equivalent thickness and size in interventional procedures. Methods: Using the human voxel phantom and MCNPX code, eye lens doses of the radiologists were simulated under different conditions of wearing lead glasses and beam projections, and measurements were performed with the physical model by using eye lens dosimeters to verify simulation results. Results: Simulation results show that the eye lens doses were reduced by a factor from 3 to 9 when wearing a 20 cm 2 sized led glasses with the equivalent thickness ranging from 0.1 to 1.0 mm Pb. The dose reduction factors (DRF) not only depend on the lead equivalent, but also the beam projection of X-rays. However, the increase of DRF was not significant whenever the lead equivalent of glasses was larger than 0.35 mm. Furthermore, the DRF was proportional to the size of glass lens from 6 cm 2 to 30 cm 2 with the same lead equivalent. Conclusion: 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 and large-sized lens is recommended.