title: [Direct radiological magnification of thin objects compared with contact exposures and mammographic techniques (author's transl)].
abstract: Image quality of phantom objects examined by direct radiographic magnification was analysed. The following results were obtained. Improvement in image quality by direct x 2 magnification of fine, but contrasted, details is very limited. Contact examination using suitable imaging systems provides images of equal quality. Course detail with poor contrast is poorly rendered by direct radiographic magnification. Mammographic techniques are better suited for this purpose. Exposures, using mammographic techniques, produce the same dose rates as direct magnification. In view of the improved image quality, this method is therefore to be preferred. It also appears that the dose rate for comparable image quality for different techniques (direct magnification, mammography, contact exposures) is approximately the same.
mesh_terms: D001842:Bone and Bones / Q000000981:diagnostic imaging; D005373:Film Dosimetry; D006225:Hand / Q000000981:diagnostic imaging; D006801:Humans; D008327:Mammography / Q000379:methods*; D008953:Models, Anatomic; D011856:Radiographic Image Enhancement / Q000379:methods; D011858:Radiographic Magnification / Q000379:methods*
vernacular_title: Die direkte röntgenologische Vergrösserung an dünnen Objekten im Vergleich zu Kontaktaufnahmen und Aufnahmen in Mammograhietechnik.