LINEAR ENERGY TRANSFER (LET)

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  • LET is the rate at which the energy of the radiation is transferred to tissue.
  • LET is related to specific ionization because, as LET goes up, the number of specific ionizations goes up as well.
  • The larger and more charged the radiation the more ionizations occur. Alpha particles are very highly ionizing, thus would have a larger LET than a low energy gamma. Alpha particles will cause more biological damage in a very small area.


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