This headline should be kept in perspective. For starters, I understand a CT scan delivers about 1000 times the radiation of an x-ray. 'Shopping centre cancer scanners can quadruple early diagnosis' https://www.google.co.uk/amp/www.telegraph.co.uk/news/2017/03/16/shopping-centre-cancer-scanners-can-quadruple-early-diagnosis/amp/ …
On top of that, it's important to consider different viewpoints of early diagnosis. For example >https://twitter.com/c7rky/status/931462246382886912 …