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Intraoperative Guidance Device to Localize a Surgical Field for Intra/Extracranial Usage

The Regulus Navigator (RN) incorporates preoperative CT and MRI images into a surgical computer system. A minimum of three points (reference markers or anatomical points) are selected with the RN on the patient in the operating room (OR space) and the corresponding locations on the images (image space) are determined and selected by the surgeon. These corresponding points in the OR space and the image space are utilized to calculate a "transformation matrix" which is used to transform the location of the RN instrument into the image space. The location of the RN instrument is interactively displayed as a cursor on the diagnostic images and then used as a tool to guide the surgeon during the intra/extracranial procedure.