The gamma knife is a similar idea, but using gamma radiation focusing: https://www.mayoclinic.org/tests-procedures/brain-stereotactic-radiosurgery/about/pac-203

The gamma knife is a similar idea, but using gamma radiation focusing: https://www.mayoclinic.org/tests-procedures/brain-stereotactic-radiosurgery/about/pac-20384679#dialogId49199783 https://www.mayoclinic.org/tests-procedures/brain-stereotact... Edit: similar idea