This study monitors the presence of hyaline membranes in (C57BI/6xDBA/2)F1 mice irradiated locally with gamma radiation of ⁶⁰Co in the area of the thorax with absorbed doses of 14, 16 and 18 Gy and in a time interval of 18, 24, 30 and 36 weeks after the irradiation of the histologically examined mice. Hyaline membranes were not noted in mice irradiated with the lowest dose of 14 Gy of gamma radiation nor in all the animals examined 18 weeks after the irradiation. We can see from the results that hyaline membranes are observed in the lungs only after higher doses of radiation and in time intervals of 24, 30 and 36 weeks after the irradiation as the other signs of RP.

Keywords: Radiation pneumonitis; Hyaline membranes; Histology; Mice