In 10 patients we found out air achromogenic (1-2 points at the Fleindler’s scale) cavities of irregular shape with walls of unchanged hypochromogenic pulmonary tissue without visible walls. Air cavities had centrilobular location, changes were the most significant in superior lobes, especially in cacuminal and posterior segments. In 26 patients we registered areas of decreased chromogeneity, of roundish shape and the small sizes (2–3 mm), located also subpleuraly and paraseptaly. In 12 patients air cavities occupied almost the whole volume of secondary segments in supradiaphragmatic areas of lungs. In 7 patients we noted presence of large and huge subpleural blebs with hyperchromogenic walls (5-6 points at the Fleindler’s scale) and their combination with air cavities of other location.

According to a number of authors, these changes correspond to various variants of emphysema (intralobular, paraseptal, panlobular). In diagnostics of PE 3D computer bioplasm nls-diagnostics is most informative at early stages of disease.