FIELD: medicine. SUBSTANCE: method involves determining optical density of lung areas in patients with pulmonary perfusion and pulmonary vascular bed development disorders. Densitometry method is applied for processing routine angiocardiograms data. Optical density A and B is measured on the angiocardiograms before and after administering radiopaque substance into the right heart divisions when the substance escapes from the lung but is not observed in the left atrium, respectively. Next to it, optical density values A' and B' are measured in most distant lung areas (in the zones with no blood vessels). The values are standardized by calculating A''=A/A' and B''=B/B'. The A''-B'' difference is used for evaluating blood circulation in lungs. The value being <0.1, pulmonary blood circulation is considered to be low. The value being between 0.1 and 0.2, pulmonary blood circulation is considered to be normal. The value being >0.2, pulmonary blood circulation is considered to be increased. EFFECT: high accuracy; enhanced effectiveness of surgical treatment; improved diagnostic applications.
