Neuronavigation is a computer-assisted technology used by neurosurgeons to guide or navigate with in the confines of the skull or vertebral column during surgery. It has become an important tool in the surgical treatment of brain tumors. It helps neurosurgeons to precisely localize different intracranial pathologies by using a set of preoperative images like CT, MRI, and fMRI, PET and SPECT. The development of computer-assisted surgery was possible only after a significant technological progress especially in the area of informatics and Imagistics. The targeting of small and deep intra cerebral lesions and choosing the best way to treat them and preserving the neurological function, represent the main indications of neuronavigation