SPUTNIK / SCIENCE PHOTO LIBRARY SPUTNIK / SCIENCE PHOTO LIBRARY
Gamma knife radiotherapy. Male patient being fitted with a head frame prior to his undergoing Gamma Knife radiotherapy to treat a brain tumour (blue). Gamma Knife (Leksell Gamma Knife) works by administering high-intensity cobalt radiation therapy in a manner that concentrates the radiation over a small volume. The frame is used to ensure the patient's head stays still during the procedure. It was invented at the Karolinska Institute, Stockholm, Sweden, in 1967 by the neurosurgeon Lars Leksell and radiobiologist Borje Larsson. Photographed at the Burdenko Institute of Neurosurgery, Russian Academy of Sciences, Russia.
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