Abstract: A computed tomography stereostactic frame is disclosed designed for use with a CT Scanner. The frame comprises a platform or support including an area thereon for supporting a patient's head and for maintaining the patient's head in position. An inverted substantially U-shaped frame is selectively movably mounted on the support. A probe holder is selectively movably mounted on either of the leg portions or the base portion of the frame and is designed to permit a twist drill bit or probe to be extended therethrough.