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ATTENUATION OF A HETEROGENOUS BEAM

Physics

ATTENUATION OF A HETEROGENOUS BEAM

1. X-ray beams are a spectrum and are therefore heterogeneous.
2. More photons are attenuated as the effective energy of a heterogeneous beam is less than a monoenergetic beam.
3. As the X-ray beam penetrates a material it becomes progressively more homogeneous.
4. This is because the lower energy photons are attenuated proportionally more than the higher energy ones - beam hardening.


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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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