Al Kafi M A, Maalej N, Naqvi A A
Department of Physics, King Fahd University of Petroleum & Minerals, Dhahran, Saudi Arabia.
Appl Radiat Isot. 2009 Oct;67(10):1837-41. doi: 10.1016/j.apradiso.2009.06.009. Epub 2009 Jul 3.
Monte Carlo simulations were used to optimize the geometry of a mammography anti-scatter linear grid to achieve minimum scatter-to-primary ratio (SPR) for different X-ray tube voltages. A single optimum design of the grid with 0.9mm septa height, 12microm septa thickness and 100microm interspace thickness was found for breast phantom thicknesses between 30 and 80mm. The optimal grid has 0.153-0.330 scatter-to-primary ratio, a Bucky factor (BF) less than 2.5 and a contrast improvement factor (CIF) of 1.3.
采用蒙特卡罗模拟方法优化乳腺摄影反散射线性滤线栅的几何结构，以实现不同X射线管电压下的最小散射与原发射线比率（SPR）。对于30至80毫米之间的乳房体模厚度，发现了一种最佳的滤线栅设计，其隔板高度为0.9毫米，隔板厚度为12微米，间隙厚度为100微米。该最佳滤线栅的散射与原发射线比率为0.153 - 0.330，滤线栅因子（BF）小于2.5，对比度改善因子（CIF）为1.3。
