[en] The morphology of Aspergillus hyphae in diffuse pulmonary aspergillosis were studied by computarized image analysis. We considered as parameters the angles of the mycelia. These data were constrasted, with similar morphometric evaluations of Pseudalleschria boydii in invasive pulmonary pseudallescheriasis. A significant difference was found between the degrees of branching angles in these two fungi. Conversely, there was no significant difference between the total surface areas covered by the two fungi. The above data suggest a potential interest of morphometry in mycology.