CT scans and later risk of leukaemia or brain tumour

Until now, estimates of cancer risk from CT scanning have been projections from data obtained from studies of the survivors of the atomic bombs in Japan. Such estimates might not be relevant to the current use of CT scans. Now the first direct study of CT scans and cancer risk has been reported (Mark S Pearce and colleagues. Lancet 2012; 380 :499–505; see also Comment, ibid:455–7). The study concentrated on the risk of leukaemia or brain tumour after CT scanning …