[Digital processing and densitometry of tomograms in central lung cancer]

Additional information on an x-ray picture of peribronchial changes in tumorous and non-tumorous lesions of the lungs were obtained in 54 patients (40 with bronchogenic, mostly central cancer and 14 with chronic inflammatory diseases) in order to study roentgenological symptomatology before and after computerized processing of tomographic images using a method of linear filtration. Image processing with the measurement of densitometric indicators provides additional information for the estimation of bronchial affection by tumor infiltration. The same method can be of value for the detection of early signs of lung cancer in patients with peribronchial changes of obscure etiology.