ANTONIA REEVE / SCIENCE PHOTO LIBRARY ANTONIA REEVE / SCIENCE PHOTO LIBRARY
Planning cancer treatment. Radiotherapist working out how to best treat a cancer patient using a linear accelerator. On the screen is a coloured magnetic resonance imaging (MRI) scan of an axial (horizontal) section through the patient's chest, showing the tumour (pink). Linear accelerators are used in radiotherapy as a source of high-voltage X-rays, which can deliver a precisely targeted dose of radiation. Photographed at the Edinburgh Cancer Centre, UK.
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