title: [Use of little focus and magnification].
mesh_terms: D006321:Heart / Q000000981:diagnostic imaging; D006801:Humans; D008433:Mathematics; D055095:Optics and Photonics; D011858:Radiographic Magnification / Q000379:methods; D013679:Technology, Radiologic / Q000295:instrumentation
vernacular_title: Quelques réflexions à propos de l'utilisation du petit foyer et de l'agrandissement