Radiation research for primary lung cancer should always be aimed not only at establishing the very fact of a malignant tumor lesion of the bronchial system, but also necessarily at determining its prevalence.

To solve the first problem, it is often sufficient to use only the traditional x-ray method in the form of the simplest methods – radiography and linear tomography. However, it must be recognized that such a volume of radiation research does not always provide the necessary diagnostic accuracy. This is due to several factors. Even in advanced stages of the disease, the size of the tumor itself may be small, making it difficult to detect. There may be difficulties in differentiating lung cancer with a variety of pathological processes of both the lungs and other organs of the chest cavity. Manifestations of lung cancer can be masked by its various complications. In all such cases, it becomes necessary to use more informative methods. Among them, computed tomography (CT) is currently recognized as a priority.