<qa>  What is the name of the new system that provides video imaging of the smallest airways?Two new systems have been developed for use down the bronchoscope, which provide video imaging of the smallest airways, each system looking at a different aspect of the structure of the airway walls. In principal, this method could provide useful information which may reduce the need for a surgical lung biopsy. We will therefore be assessing the value of the additional information obtained with these two new systems. 