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10 Cards in this Set
- Front
- Back
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What is the purpose of Intensifying Screens?
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Used to amplify the incoming x-ray beam and reduce patient radiation dose.
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Intensifying Screens have four parts, what are they?
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Base, reflective layer, phosphor layer, protective coat
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What are the characteristics of the Base?
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Made of polyester plastic 1mm thick, flexible, tough, rigid, chemically inert, and uniformly radiolucent.
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Characteristics of the Reflective layer?
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Used to reflect light toward the film. Increasing the light striking the film and creating the latent image, decreasing patient dose.
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Characteristics of the phosphor layer?
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"Active Layer" Phosphors are materials capable of absorbing the energy of x-ray photons and then emitting light photons.
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Purpose of the protective coat?
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Protects the phosphor layer from abrasions and stains.
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Why do phosphors need a high atomic number?
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Increases the probability of incident x-ray photon interactions. Permit photoelectric and compton interactions.
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What is Conversion Efficiency?
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The ability of the phosphor to emit as much light as possible.
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As conversion efficiency increases the dose to the patient (blank).
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Decreases
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Spectral emission
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Indication of the precise wavelength fo light emitted by the phosphor.
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