title: An evaluation of four rare-earth film-screen combinations.
abstract: Objective and subjective assessments are made on four film-screen combinations at 140 kV for use on an EMI body scanner. The combinations used were: 3M XD film + Trimax Alpha 8 screens; Agfa Gevaert RP film + MR600 screens; Kodak Ortho G film + Lanex regular screens and Ilford type S film + rare earth rapid R screens. The objective assessment is based on the optical density of the image of a test object on a radiograph. Receiver operating characteristic techniques are used in the subjective assessment. The best results in each assessment were obtained using the Kodak Ortho G film + Lanex regular screens.
mesh_terms: D001608:Beryllium; D005069:Evaluation Studies as Topic; D005682:Gadolinium; D007811:Lanthanum; D013725:Terbium; D014057:Tomography, X-Ray Computed / Q000295:instrumentation*
chemical_list: D013725:Terbium; D007811:Lanthanum; D005682:Gadolinium; D001608:Beryllium