Management needs you to find the diference between these two images:<br><br>Optically                    Electromagnetically<br><br><br>They're the same image,(reply>), @The Pink Pansy yup, though I was commenting on how infrared radiation (which I believe is used for the "optical" way to track the instruments) , just as visible light and other wavelengths of light, is just a wave in the electromagnetic field, which as its name implies is also the conduit for magnetism, the other way of locating the instruments.<br><br>So technically, whatever the setting's on, it's using something related to electromagnetism,(reply>), They talking about the tracking method used to find the surgical tools, not the images the location is being displayed on.