Fig. 5

Eccentric and concentric REBUS image patterns during robotic bronchoscopy. Top panel: at 24 mm away from the nodule, the REBUS probe was advanced and only an eccentric pattern was obtained; note that the target is not seen on the Monarch EMN display monitor (blue arrow). Bottom panel: the scope is advanced to 15 mm away from the lesion, and the REBUS monitor now shows a concentric pattern (associated with higher diagnostic yield). Note that the nodule is now also seen on the Monarch EMN display monitor (blue arrow). REBUS: radial probe ultrasound; EMN: electromagnetic navigation