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Did X-rays help?
Before scanning techniques were invented, doctors could use only X-rays to look at the brain. This didn't work very well, and involved injecting air or other substances into the patient to improve the contrast of the image - painful and hazardous procedures. The introduction in the 1970s of techniques like CAT and MRI revolutionised medicine.Enlarge
Coloured X-ray of a healthy human skull.
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