Scintillation Detectors in Radiology
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Questions and Answers

In scintillation detectors, what happens when X-rays fall onto the crystal?

  • Flashes of light are produced (correct)
  • Electromagnetic waves are generated
  • Gas chambers are activated
  • Photomultiplier tubes are turned off

    • What is the role of the photocathode in a photomultiplier tube?

  • Produces X-rays
  • Creates positive ions
  • Generates flashes of light
  • Releases electrons (correct)

    • Why are gas-ionization detectors based on the principle of ionization?

  • To generate flashes of light
  • To enhance X-ray penetration
  • To activate gas chambers
  • To produce positive and negative ions (correct)

    • What is the purpose of the tungsten plates in gas-ionization detectors?

    <p>To act as electron collection plates</p> Signup and view all the answers

    Why must scintillation detectors exhibit a short primary decay time in CT?

    <p>To provide fast signal output</p> Signup and view all the answers

    What is the main difference between scintillation detectors and gas-ionization detectors?

    <p>Method of light production</p> Signup and view all the answers

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