Contrast-based imaging technique, by which FICT-dextran (150,000 dalton p.m.) is injected into the sub-epidermal layer, in order to display lymphatic capillary and precollector (see) structures in the skin of all body districts and examine their morphology, average diameter, intralymphatic pressure, and any changes with breathing. Despite some interesting results attained, this imaging technique has not yet become common clinical practice.