Stereotactic surgery
![Brain biopsy using a needle mounted on a stereotactic instrument](/Images/godic/202502/13/Brain_biopsy_under_stereotaxy3055.jpg")
![Gammaknife](/Images/godic/202502/13/Gammaknife3055.jpg")
![Frame for Stereotactic Thalamotomy on display at the Glenside Museum](/Images/godic/202502/13/Frame_for_Stereotactic_Thalamotomy_on_display_at_the_Glenside_Museum3055.JPG")
Stereotactic surgery or stereotaxy (not to be confused with the virtuality concept of stereotaxy) is a minimally invasive form of surgical intervention which makes use of a three-dimensional coordinate system to locate small targets inside the body and to perform on them some action such as ablation, biopsy, lesion, injection, stimulation, implantation, radiosurgery (SRS), etc.