24 Z. You et al.: Radioprotection 2025, 60( 1), 20 – 27
Fig. 3. Highest and lowest radiation doses areas under 8 projection angles. Fig. 4. Comparison of radiation dose in area( 7), area( 11) and area( 15) under 8 projection angles.
screen in substantially attenuating the radiation exposure of the first operator, consistent with prior research( Jia et al., 2017). However, the second operator, despite being more distal to the X-ray tube, often registers higher radiation doses, contrary to the results of previous studies( Ullery et al., 2014). This anomaly is attributed to the suboptimal coverage offered by the under-table lead curtain, which inadequately shields the second operator’ s area, and that the operating table cannot be lowered to the lowest point due to the limitations of the X-ray tube at some projection angle, resulting in the lead curtain under the operating table overhanging from the floor, and the scattering of radiation can be leaked through the gap between the lead curtain and the floor, resulting in a higher dose of radiation for the second operator than for the first operator. This result reminds us to pay more attention to the radiation dose of the second operator and to take better