Light-weight imaging assemblies for oncology portal imaging

摘要

Imaging assemblies comprise thin metal screens adjacent fluorescent intensifying screens. Such assemblies can be included as part of radiographic imaging assemblies in which a radiographic film is positioned behind the metal and fluorescent intensifying screens. The metal screen is from 0.01 to 0.75 mm in thickness when composed of copper and from 0.05 to 0.40 mm when composed of lead. Photospeed and other imaging characteristics are not diminished with the use of these relatively thin metal screens.