FIGURE 3.

The passive magnetic NGT interface display is shown for IP and OOP target-proximity tasks (middle) and target-contact tasks (bottom). This image shows the ability of NGT to assist in real-time localization of the needle tip as the needle passes through the beam (solid green lines). Needle guidance technology is also able to calculate the position of needle segments anterior and posterior to the beam (dotted green lines). For OOP approaches, the yellow target appears at the projected intersection with the target.