Q:

The lead aprons that are used for protection of staff in diagnostic radiography procedures do not provide protection against the ionising radiation used in nuclear medicine or radiotherapy. Why is this? Because

waelhammad
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2022-10-21
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The lead aprons that are used for protection of staff in diagnostic radiography procedures do not provide protection against the ionising radiation used in nuclear medicine or radiotherapy. Why is this? Because

  1. charged particles are much easier to stop (are less penetrating) than photons are
  2. gamma rays are more penetrating than x-rays even if both have the same energy.
  3. such aprons do not cover the arms, feet, head and neck.
  4. the shielding provided by the aprons is not sufficient to stop photons with energies above about 100 keV.
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waelhammad
2022-10-21
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D: Diagnostic radiography uses x-rays with an average energy of 70 keV or less, which can be stopped by relatively thin amounts of lead (or leadlike) material. In order to stop the gamma rays used in nuclear medicine imaging, the thickness of the “aprons” would make them prohibitively heavy to wear

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