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Why is a 150 keV gamma emitter more useful for nuclear medicine than an 800 keV gamma emitter? Because

waelhammad
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2022-10-21
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Why is a 150 keV gamma emitter more useful for nuclear medicine than an 800 keV gamma emitter? Because

  1. more 150 keV photons are stopped in the detecting crystal of the gamma camera.
  2. 800 keV photons cannot penetrate the body in sufficient quantities to produce an image.
  3. a 150 keV photon results in a lower dose to the patient than an 800 keV photon.
  4. 800 keV photons require more shielding for the staff.
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waelhammad
2022-10-21
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A: 800 keV gamma photons are more penetrating than 150 keV photons, so fewer of them will be detected by the “camera”. Hence longer exposure, or a greater dose of radiopharmaceutical would be required to produce an image.

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