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Detail sharpness in radiographic magnification depends upon the properties of the focal spot, the screen and upon object motion. With direct magnification the finite size of the focal spot causes an increased penumbra. Uneven distribution of focal spot radiation leads to formation of false images. Radiographic magnification is rational when using a minute focal spot in combination with a poorly resolving (high speed) screen while the object remains stationary. Using high detail screens or non screen films there is no improved but possibly inferior resolution to non-magnified images, even though 0.1 mm x 0.1 mm foci are employed. Radiographic magnification performed with focal spots larger than 0.3 mm x 0.3 mm is not reasonable. Magnification procedures cause a considerable radiation exposure to the patient.
M Schmidt-Hieber, and
Strecker E-P
January 1976,
Revista brasileira de odontologia,
M Schmidt-Hieber, and
Strecker E-P
May 1982,
Der Radiologe,
M Schmidt-Hieber, and
Strecker E-P
January 1976,
La Radiologia medica,
M Schmidt-Hieber, and
Strecker E-P
October 1977,
Schweizerische Rundschau fur Medizin Praxis = Revue suisse de medecine Praxis,
M Schmidt-Hieber, and
Strecker E-P
July 1977,
Nihon Igaku Hoshasen Gakkai zasshi. Nippon acta radiologica,
M Schmidt-Hieber, and
Strecker E-P
May 1979,
Wiener medizinische Wochenschrift (1946),
M Schmidt-Hieber, and
Strecker E-P
June 1980,
Der Radiologe,
M Schmidt-Hieber, and
Strecker E-P
September 1978,
La Radiologia medica,
M Schmidt-Hieber, and
Strecker E-P
August 1980,
Der Radiologe,
M Schmidt-Hieber, and
Strecker E-P
July 1976,
Rontgen-Blatter; Zeitschrift fur Rontgen-Technik und medizinisch-wissenschaftliche Photographie,
