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EMR (BEAM) INTENSITY

Physics

EMR (BEAM) INTENSITY

1. Radiation travels in rays that radiate in all directions from a point source.
2. A collimated set of rays is known as a beam.
3. Take a cross-sectional slice of a beam and count the number of photons. This is the photon fluence of the beam at that point.
4. A beam may contain photons of different energies.
5. The amount of energy of all the photons in the photon fluence is the energy fluence at that point.
6. The energy fluence per unit time is the energy fluence rate, also known as the beam intensity.


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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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