title: [Measurement of the modulation transfer function of film-screen combinations with a lead scanning pattern].
abstract: A lead bar pattern, with continuously varying frequencies, has been used for measurement of modulation transfer functions of screen-film combinations. Although the highest usable frequency of the grid is only 3.4 mm-1, evaluation of the first as well the third harmonic permits the expansion of the frequency range up to 10.2 mm-1. Automatic evaluation of the images of the bar pattern gives reproducible results. These are presented.
mesh_terms: D005069:Evaluation Studies as Topic; D008722:Methods; D011856:Radiographic Image Enhancement / Q000295:instrumentation; D014963:X-Ray Intensifying Screens
vernacular_title: Messung der Modulationsübertragungsfunktion von Film-Folien-Kombinationen mit einem Bleiraster.