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The pari-path surgical navigation system is a stereotactic accessory for Computed Tomography(CT) and Ultrasound imaging systems. It displays the simulated image of an interventional instrument ( a tracked insertion tool), such as a biopsy needle,an ablation needle ,or probe,on a computer monitor screen that shows an image model of the target organs and the current and the projected future path of the interventional instrument. Ultrasound imaging is incorporated with the pari-path surgical navigation system for the situation in which the target organs may move because of palients's respiratory. It is intended for treatment planning and intra-operative guidance for surgical procedures. It is intended for use in clinical interventionals and for anatomical structures where imaging is currently used for visualizing such procedures.

The pari-path surgical navigation system is a stereotactic accessory for Computed Tomography(CT) and Ultrasound (US). It utilizes electromagnetic tracking technology to locate and navigate instruments relative to an image model of the patient anatomy. It displays the simulated image of an interventional instrument (a tracked insertion tool). such as a biopsy needle, an ablation needle, or probe, on a computer monitor screen that shows the image model of the patient anatomical target organs and the current and the projected future path of the interventional instrument. The image model of patient anatomical organs is derived from two-dimensional patient images (scan sets) via the navigation system. The interventional instrument can be located and navigated on the image model. Ultrasound imaging is incorporated with the system for the situation in which the target organs may move because of patient's respiratory. The system performs spatial mapping from CT image space to physical space ("registration") to correlate scan sets to the patient. It consists of a magnetic field transmitter, tracking sensors, system unit, monitor, keyboard, mouse, software, and an "off the shelf" ultrasound device (an optional, not supplied with the system).