Reacción a "Reactions: study shows association between undergoing CT scan as a young person and increased cancer risk"

This is a comprehensive study bringing together data from a large number of medical centres and contributes to the body of knowledge on risk from ionising radiation.

It has been known for many decades that there is a link between exposure to ionising radiation and the generation of cancers.  There has been a huge amount of work from centres around the world to calculate the risk factor and how the risk manifests itself in terms of type of disease.  This has been the central tenet for not just limiting exposure to ionising radiation but also for providing justification for each and every patient; specifically, the benefit must outweigh any potential detriment.  This study confirms the importance of controlling exposure and furthermore states a risk factor which is of importance when estimating the risk/benefit balance.

The study is well designed, comprehensive and a valuable addition to the body of knowledge.