X-rays

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  • X-rays
    • Properties
      • Part of the electromagnetic spectrum
      • High frequency
      • Short wavelength
        • Wavelength is about same size as the diameter of an atom
      • Absorbed by metal and bone
      • Transmitted by healthy tissue
      • Affect a photographic film in the same way as light
    • Uses
      • Forming images of bones on photographic film
        • This is to check for fractures and dental problems
      • Charged-coupled devices
        • Used to form electronic images of X-rays
      • CT scanners
        • Use X-rays to produce digital images of a cross-section through the body
    • Risks
      • X-rays cause ionisation and can damage living tissue
        • They do this when they pass through it
          • Precautions
            • Workers should wear film badges
            • Workers should when possible use lead screens
              • This is to shield them from the X-rays
    • Precautions
      • Workers should wear film badges
      • Workers should when possible use lead screens
        • This is to shield them from the X-rays

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