title: Relative dose efficiencies of antiscatter grids and air gaps in pediatric radiography.
abstract: 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.
mesh_terms: D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D008961:Models, Structural; D011829:Radiation Dosage; D011859:Radiography / Q000295:instrumentation*; D012542:Scattering, Radiation; D013679:Technology, Radiologic