X-ray film

X-ray film displays the radiographic image and consists of emulsion (single or double) of silver halide (AgBr is most common) which when exposed to light, produces silver ion (Ag+) and electron. The electrons get attached to the sensitivity specks and attract the silver ion. Subsequently, the silver ions attach and clumps of metallic silver (black) are formed 1,2.

Layers
  • base: cellulose triacetate or polyester
  • substratum: an adhesive layer containing gelatin and solvents that bind emulsion and base
  • emulsion: silver halide and gelatin, with some hardening agents
  • protective layer: gelatin

The total thickness of the film is about 0.25 mm

Types
  • screen type films: faster when used with intensifying screen
    • conventional
    • orthochromatic (green sensitive)
  • direct exposure type: used for dental exposures

 

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Article Information

rID: 31492
Section: Physics
Tag: refs
Synonyms or Alternate Spellings:

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