The development and implementation of computerized, image-guided surgical tools to be utilized during minimally invasive brain operations. The clinical outcome of new technologies, and in particular the application of radiosurgery, for the treatment of brain tumors. The creation of new radiosurgical techniques for a wide array of brain and spine disorders which includes 1) trigeminal neuralgia 2) spinal cord AVM 3) pituitary tumors 4) skull base meningioma 5) benign peri-optic tumors 6) brain metastases 7) acoustic neuroma 8) glomus jugulare tumors 9) brain and spine schwannoma 10) painful facet syndrome 11) radiomodulation for functional disease of the brain.