When Are Intensifying Screens Used?

Intensifying screens are used in the x-ray cassette to intensify the effect of the x-ray photon by producing a larger number of light photons. It decreases the mAs required to produce a particular density and hence decreases the patient dose significantly.

Where are the intensifying screens attached to?

Intensifying screens are attached to one or both inside panels of the cassette. Screens "amplify" the effect that x-ray photons have on the x-ray film. When an incoming x-ray photon interacts with phosphor crystals contained in an intensifying screen, light is emitted.

What is the purpose of the intensifying screens reflective layer?

Light traveling away from the film is reflected back to the film by a reflective layer. Screen speed is increased when a reflective layer is used. An absorptive undercoat decreases light flare from the screen, resulting in increased detail.