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RADIOACTIVITY

Physics

RADIOACTIVITY

1. Radioactivity is the number of radioactive atoms that decay per second.

2. Unit is the becquerel (Bq):1 Bq = 1 disintegration per second.

3. Very small unit (natural radioactive content of the human body is ~2000 Bq). We usually deal with megabecquerels (MBq).

4. The count rate is the number of gamma rays that reach the detector per second - proportional to (but less than) the activity.


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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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