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Most of the man-made radiation we are exposed to comes from the medical procedures we undergo—standard X-ray and CT scans to diagnose injuries and disease. Radiation is also used in radiation therapy to improve health and even save lives.
With borehole logging devices containing sealed radioactive sources, exploration workers can be exposed to significant radiological health hazards.
To measure radiation activity or the amount of radiation coming out of a source, Australians use the unit Becquerel (Bq) from the international system (SI) of units or the metric system.