Validation of human small airway measurements using endobronchial optical coherence tomography

We have elected to submit Fig. 1 for the Graphic abstract. The legend is as follows: EB-OCT probing guided by navigation system. Ultrafine bronchoscope with C7 Dragonfly OCT probe (C), guided by the navigation system. (A)Vision of ultrafine bronchoscope; B) Real-time synchronous operation with navigation from the trachea (generation 0) to the 9th generation bronchi (D); Initiation of scanning (E). 237