What is meant by "background radiation"?

The concept of "background radiation" refers to the natural level of radiation that is consistently present in the environment from various sources. This includes radiation from cosmic rays originating from outer space, terrestrial radiation from the earth and its minerals, and internal radiation from radioactive isotopes within our bodies. Background radiation is an essential aspect of radiation protection because it establishes a baseline level of exposure that individuals receive in their daily lives, regardless of medical procedures or other artificial sources.

This understanding helps in assessing additional exposures from other sources, such as medical imaging or occupational hazards, by providing context for what is considered normal or expected. Evaluating background radiation levels allows professionals to implement appropriate safety measures and guidelines to minimize risk and ensure public health safety.