title: [Phantom experiments and early clinical experience with a mammogram apparatus using a grid (author's transl)].
abstract: The effect of a grid on film quality and dose was investigated in a newly developed mammographic apparatus (Mammo Diagnost U--C. H. F. Müller). It was shown that available film-screen combinations used with a grid produced practically the same picture quality as Definix Medical used without screen or grid. Although the dose required is almost doubled by the use of the grid, the latter, nevertheless, produces a reduction of surface dose to about a quarter (4 cm. plexiglass phantom). Using a film-screen combination not at present commercially available, there was some improvement in the demonstration of microcalcification, but the improvement resulted in an increase in the required radiation dose.
mesh_terms: D006801:Humans; D008297:Male; D008327:Mammography / Q000295:instrumentation* / Q000592:standards; D008953:Models, Anatomic
vernacular_title: Phantomuntersuchungen und erste klinische Erfahrungen an einem Raster-Mammographiegerät.