Q:

Why is radiotherapy using high energy x-rays, an effective way of treating some cancer? Because

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Why is radiotherapy using high energy x-rays, an effective way of treating some cancer? Because


  1. if enough energy is deposited in tumor cells, they can be killed
  2. most of the x-rays pass through the body without harming healthy tissue
  3. the dose to the skin surface is lower than with low energy x-rays
  4. high energy x-rays do not kill healthy cells

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A: The ability of x-rays to be switched off and on and to deposit enough energy within a cell to kill it, makes it suitable for treatment of cancer tumors.

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