Growth of CT scanning

In the USA the average dose received by members of the public from the diagnostic use of ionising radiation has increased from 0.5 mSv to 3.0 mSv in 25 years. The largest contributor to this medical irradiation is now the use of CT scans which accounts for perhaps greater than 50% of the total in Australia (see attached graph of CT scanning increase in USA). It has been estimated* that 430 people die from cancer each year in Australia as a result of exposure to diagnostic x-rays.

* Berrington de Gonzalez, A. and S. Darby, (See references in section 12)