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: $Cs=&space;\frac{100}{SF}$ (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).

##### 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