Antiscatter grids are used in biomedical X-ray imaging to improve image quality by reducing scatter radiation reaching the image receptor. However, this comes at the cost of increasing radiation exposure. Grid performance can be improved by optimizing strip-thickness, which reduces radiation exposure, leading to greater benefits achieved by the grid. Evidence has shown that strip height may also affect grid performance. This work investigates optimization of grid performance by varying both the strip thickness and height for a constant grid-ratio of 15:1 (r15). A series of grid designs using lead strips and carbon-fiber-interspace materials for grids for high-energy use was evaluated. The performance of these designs was determined by adopting a Monte Carlo simulation. For each grid design, the signal-to-noise ratio improvement factor (K_SNR) was determined. A maximum value of K_SNR (1.895) was found among these designs at a strip height of 6.8 mm and a thickness of 66.8 μm. The best performance of the r15-series grids is 6% greater than that of a grid design with a grid ratio of 15:1 and a strip frequency of 44 cm⁻¹ (found in the literature); consequently, the transmission of scatter radiation is reduced by 40%. The results show that grid designs can be optimized by both the strip height and thickness. If the optimization of the strip height and thickness cannot be done simultaneously, the recommendation is to optimize the strip height for better radiation protection without compromising the grid performance. The findings provide useful guidance for designing high-performance antiscatter grids to reduce radiation exposure of patients.

中文翻译：

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通过优化带材厚度和高度的新型防散射栅设计

抗散射网格用于生物医学 X 射线成像，通过减少到达图像接收器的散射辐射来提高图像质量。然而，这是以增加辐射暴露为代价的。可以通过优化带材厚度来提高电网性能，从而减少辐射暴露，从而使电网获得更大的收益。有证据表明，带钢高度也可能影响电网性能。这项工作通过在 15:1 (r15) 的恒定网格比下改变带材厚度和高度来研究网格性能的优化。评估了一系列使用铅条和碳纤维间隙材料用于高能网格的网格设计。这些设计的性能是通过采用蒙特卡罗模拟来确定的。对于每个网格设计，信噪比改进因子 (K _SNR ) 被确定。在这些设计中，在带钢高度为 6.8 mm 和厚度为 66.8 μm 时发现了K _{SNR 的}最大值(1.895)。r15系列格栅的最佳性能比格栅比为15:1、条频为44 cm ^-1的格栅设计提高了6%（在文献中找到）；因此，散射辐射的透射率降低了 40%。结果表明，网格设计可以通过带钢高度和厚度进行优化。如果不能同时优化带材高度和厚度，建议优化带材高度以在不影响电网性能的情况下获得更好的辐射防护。这些发现为设计高性能抗散射网格以减少患者的辐射暴露提供了有用的指导。