SPUTNIK / SCIENCE PHOTO LIBRARY SPUTNIK / SCIENCE PHOTO LIBRARY
Gamma knife radiotherapy. Brain scan of a male patient taken 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. It was invented at the Karolinska Institute, Stockholm, Sweden, in 1967 by the neurosurgeon Lars Leksell and radiobiologist Borje Larsson, from Sweden's Uppsala University. Photographed at the Burdenko Institute of Neurosurgery, Russian Academy of Sciences, Russia.
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