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RANDOM NOISE (QUANTUM MOTTLE)

Physics

RANDOM NOISE (QUANTUM MOTTLE)

1. This is the most significant source of noise in radiological imaging.

2. Caused by the statistical nature of the acquisition process.

3. Described by the signal-to-noise ratio: (where x i is the signal at each pixel i in the ROI, x BG is the mean bakground signal, is the standard deviation of photons, i.e. noise in the background).

4. Signal-to-noise ratio increases as the number of photons contributing to the image increases.


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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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