Fig. 1.

Long-range optical coherence tomography (LROCT) system clinical prototype. The main OCT system contains all the major optical and electrical components necessary for LROCT imaging, as well as supplying the necessary power for the imaging probe control unit, which is responsible for OCT imaging probe rotation and pull back. The computer unit with a commercial graphics processing unit rapidly acquires and processes the OCT data and provides real-time display of two-dimensional (2-D) cross sections of airway. Three-dimensional (3-D) reconstructions are then performed using the acquired 2-D images with the help of a commercial software.