title: [Image quality from direct radiological magnification (author's transl)].
abstract: An assessment of image quality from a direct radiological magnification method with a microfocus was carried out. It was found that direct magnification has advantages for the magnification of thin objects (5 cm. thickness). Because of the marked radiation scarrer in thick objects an improvement in picture quality is not possible. Scatter, despite the Groedel effect, is too large. Optimum results are obtained with a microfocus tube using universal screens. Comparable image quality is not possible with high intensification screens. High definition screens are not suitable for magnification. Dose measurements revealed unexpectedly low levels, particularly for thin objects. The reasons for this were examined and are described.
mesh_terms: D005069:Evaluation Studies as Topic; D008962:Models, Theoretical; D055585:Physical Phenomena; D010825:Physics; D011786:Quality Control; D011858:Radiographic Magnification / Q000295:instrumentation / Q000379:methods*; D012542:Scattering, Radiation
vernacular_title: Bildgüteuntersuchung zur direkten röntgenologischen Vergrösserung.