NCIt definition : An investigative technique that permits high-resolution assessment of the histology
of an endoluminal surface at a cellular and sub-cellular level. The technique is based
upon the principle of illuminating a tissue with a low-power laser and then detecting
fluorescent light reflected from the tissue. The laser is focused at a specific depth
and only light reflected back from that plane is refocused and able to pass through
the pinhole confocal aperture, increasing spacial resolution.;