Koedooder K, Venema H W
Phys Med Biol. 1986 Jun;31(6):585-600. doi: 10.1088/0031-9155/31/6/001.
A computer program was developed to calculate both integral absorbed dose in a water phantom and entrance exposure, for the imaging of iodine contrast with x-ray intensifying screens. The effect of filtration of the x-ray beam on integral absorbed dose and entrance exposure was studied for 27 different filter materials and four types of intensifying screens. The dose and exposure were calculated, keeping the image contrast and energy absorption in the screens constant. To check the validity of the calculations, a number of measurements were performed, the results of which agreed well with our calculations. A remarkable result is that dose and exposure reduction can be achieved almost equally well with conventional filters (aluminum and copper) as with a number of K-edge filters. This was found for situations commonly encountered in diagnostic radiology (60-80 kV, 20 cm water). This finding is in contrast to a number of earlier studies, in which K-edge filters were found to be superior to conventional filters.
开发了一种计算机程序，用于计算水模体中的积分吸收剂量和入射剂量，以用于使用X射线增感屏对碘造影剂进行成像。针对27种不同的滤过材料和四种类型的增感屏，研究了X射线束滤过对积分吸收剂量和入射剂量的影响。在保持屏内图像对比度和能量吸收恒定的情况下计算剂量和入射剂量。为检验计算的有效性，进行了一些测量，测量结果与我们的计算结果吻合良好。一个显著的结果是，使用传统滤过材料（铝和铜）与使用一些K边滤过材料几乎能同样有效地降低剂量和入射剂量。这是在诊断放射学常见的情况（60 - 80 kV，20 cm水模体）下发现的。这一发现与一些早期研究结果相反，在那些研究中，K边滤过材料被认为优于传统滤过材料。
