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1951, using the
Lars Leksell and the physicist and radiobiologist
Borje Larsson, developed the concept of
Leksell and Larsson first employed proton beams
coming from several directions into a small area into
the brain, in experiments in animals and in the first
treatments of human patients.
He called this technique "strålkniven" (ray knives).
History of stereotactic Radiotherapy II