Q:

What is the purpose of adding filtration to an x-ray beam? To:

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What is the purpose of adding filtration to an x-ray beam? To: 


  1. Prevent high energy photons entering the patient
  2. Increase the mean energy of the beam
  3. Decrease the scattered radiation
  4. Increase the ratio of low energy photons to high energy photons

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B: X-rays are produced in an x-ray tube with a range of energies. Filtration will absorb the lowest energy photons more than higher energy ones. This will result in the average energy of the remaining spectrum increasing.

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