In 1949, Swedish neurosurgeon Lars Leksell, with the assistance of radiobiologist Borje Larsson, created the first stereotactic instrument for human neurosurgery. Leksell believed that extremely precise doses of radiation could be focused on the brain to be as effective as a scalpel. He created the first head frame that would eventually become a fixture in gamma knife treatment, as it would help keep the patient perfectly still to ensure accuracy. Health, Medical, Gamma Knife
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