A long, slender, rod-like device made of metal, used during image guided surgery (e.g., neurosurgical or orthopaedic surgery procedures) to accurately position implantable devices (e.g., shunts), or to correlate the position of its tip to that of a targeted tissue of interest within a patient so that this area of tissue is clearly pinpointed with respect to diagnostic images stored in the stereotactic surgery system. This is a reusable device.