MRI scans have been hailed as a significant step forward in the diagnosis of medical conditions. But there is concern exposure to the magnetic fields they create may produce adverse long term health effects.
Sir William Stewart, the U.K. Health Protection Agency chairman, said: "MRI scanning has some undoubted benefits in medicine, especially as an aid to accurate clinical diagnosis.
"However we need to bear in mind that the magnetic fields produced by the machines are quite substantial and that these fields are increasing in order to achieve improved clarity of image. The exposures to patients and medical staff from the magnetic fields can be high and there is a shortage of information on possible adverse long term health effects."
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