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EFFECT OF SCATTER ON CONTRAST

Physics

EFFECT OF SCATTER ON CONTRAST

1. Scatter radiation is, more or less, uniform over the image.
2. Reduces image contrast by an order of magnitude: (where Cs = contrast with scatter as a %, SF = scatter factor = scatter:primary ratio).

3. If SF = 4 (i.e. 4 x more scattered radiation reaches the detector than primary radiation) then contrast will be 25% of what it would be if there was no scatter (SF = 1).


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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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