The Extend program belonging to the Elekta is the entire system for increasing the usage of the Leksell Gamma Knife® Perfexion™. The device, Elekta is having an exceptional skill in the stereotaxy and the intuitive revolution in the neurosurgery and the radiation oncology. The Elekta's enhanced line of the stereotactic treatment solutions offers new prospects for even the most vital and difficult cases. The Leksell Gamma Knife Perfexion allows for the accurate and well organized treatment of the most inconvenient targets in the head. It is an exceptional product and stands apart in the field of the radiosurgery solutions. The inclusion of the Extend program in the device has made it possible to treat the new indications which were earlier non-treatable with the Gamma Knife® surgery. The lesions are so large or located in so much critical places that not even the Gamma Knife conformity is enough. The Fractionation is a new alternative for the physicians in these cases. The smooth and efficient workflow is maintained with the device, the Extend™.