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LINEAR ENERGY TRANSFER (LET)

Physics

LINEAR ENERGY TRANSFER (LET)

1. LET is the energy transferred to a tissue per unit length.

2. Depends on radiation type and energy.

3. High LET => more damaging.

4. Low LET radiation: X-rays, gamma rays, electrons.

5. High LET radiation: alpha particles (less energy than X-rays and travels shorter distances but cause more ionisations in a smaller space which are more likely to be irreparable), neutrons.


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REFERENCES

1. Bushberg, J. T. (2012). The essential physics of medical imaging. Philadelphia: Wolters Kluwer Health/Lippincott Williams & Wilkins. Find it at Amazon
2. Heggie, J. C., Liddell, N. A., & Maher, K. P. (1997). Applied imaging technology. Melbourne: St. Vincents Hospital.

Ⓒ A. Manickam 2018

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