BSIP, LAURENT / SCIENCE PHOTO LIBRARY BSIP, LAURENT / SCIENCE PHOTO LIBRARY
MRI scans. Radiographer examining MRI scans of a healthy brain. The scans show nine horizontal (centre right, held in hand) and two vertical (left, on screen) "slices" through a patient's head. MRI (magnetic resonance imaging) is a diagnostic technique that produces cross- sectional images of parts of the body. These are built up from the tiny radio signals emitted when hydrogen atoms inside the patient's body are made to fall out of magnetic alignment. MRI is most useful for studying soft tissues like the brain and spinal cord. The images produced are examined by a radiographer (as seen here) and disorders such as tumours diagnosed.
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