Clinical importance of some in vivo radionuclide methods of examination of lung cancer patients

The results of the visual evaluation of scintiphotography with MMA-sup(99m)Tc and studies with 133Xe in patients with different pulmonary pathology with lung cancer and with nontumorous pulmonary diseases were considered. To improve the reliability of the visual evaluation, the zone and lung coefficients (Ksub(z) and K1) were proposed making it possible to raise the specificity of evaluation. The extent of disorders of the blood flow in the lungs was correlated with that of changes defined on the radiographs. In most patients with lung cancer, such disorders exceeded the extent of changes on the radiographs-64.4%. In nontumorous lesions the excess of changes was observed in focal processes (tuberculosis)