PPT Slide

Film screen mammography

D = log(I0/I)

• Image receptor

Film: Plastic base 200 mm thick

Emulsion of halide grains 10 mm thick Ag+ + e- => Ag

• Fluorescent screen
  Active phosphorous particles in a
  
  binding material 70-300 mm thick
  (ex. Gd2O2S:Tb, g-fluorescence 5480Å)

Optical density D

Log(relative exposure)

See:ref mammografia, Physics of medical imaging,S.Webb editor.Bristol, Adam Hilger, 1990.

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