McDaniel D L, Cohen G, Wagner L K, Robinson L H
Med Phys. 1984 Jul-Aug;11(4):508-12. doi: 10.1118/1.595520.
The relative dose efficiencies (RDE) of various antiscatter grids and air gaps were determined for conditions simulating those found in pediatric radiography, using phantoms representing a newborn child, a 5-yr-old and a 10-yr-old child. Our data indicate than an air gap is best for the newborn, due to the low levels of scatter. The 8:1 fiber grid or 15.2-cm air gap without a grid can improve dose efficiency (DE) for the 5-yr-old child by 20%-25% relative to the 3.3-cm air gap and no-grid technique, while for the 10-yr-old child, DE can be improved by 40% with an 8:1 fiber grid.
使用代表新生儿、5岁儿童和10岁儿童的体模，针对模拟儿科放射成像中所发现的条件，测定了各种反散射格栅和气隙的相对剂量效率（RDE）。我们的数据表明，由于散射水平较低，气隙对新生儿最为适用。相对于3.3厘米气隙和无格栅技术，8:1纤维格栅或15.2厘米无格栅气隙可使5岁儿童的剂量效率（DE）提高20%-25%，而对于10岁儿童，使用8:1纤维格栅可使DE提高40%。
