Medical devices, namely, biopsy instruments; needles, namely, injection needles and suction needles; brushes, namely, brushes for use in taking tissue and cell samples; forceps; catheters; location markers and location marker cartridges; radioactive seeds; lasers and RF ablation treatment instruments; cameras, namely, endoscopy and bronchoscopy cameras; ultrasounds; optical coherence tomography (OCT) machines; and magnetic resonance imaging (MRI) machines that are navigated to, targeted at or localized at, a location or locations within a body, on a body or in the vicinity of a body, with such navigation, targeting or localization being assisted by a system comprised of computer hardware, computer software, computer displays and other hardware and/or software