ANTONIA REEVE / SCIENCE PHOTO LIBRARY ANTONIA REEVE / SCIENCE PHOTO LIBRARY
Cancer treatment plan. Screenshot of a radiotherapy treatment plan for targeting cancer using a linear accelerator. The coloured magnetic resonance imaging (MRI) scan of an axial (horizontal) section through the patient's chest shows 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.
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