These probes may be usefully coupled with recent in vivo and in situ microimaging techniques such as probe-based confocal laser endomicroscopy (pCLE). pCLE is an endoscopic technique that has recently been applied to the exploration of distal lung diseases [48 –50 ], and is currently evaluated to image distal lung nodules (ClinicalTrials.gov Identifier:NCT01931579).
Source: wiktionary