[The effect of the size of the irradiation field on the severity and outcome of the radiation injury of swine skin].

Swine skin areas of 12.56 cm2, 50 cm2 and 100 cm2 were exposed to beta-particles from 90Sr + 90Y (100 Gy). The increase in size of the exposed site caused a considerable increase in the degree of the affection and a change in the regeneration rate. Epithelialization of 12.56 cm2 skin field was completed by the 14th-16th week, and it was absent after 4.5 years in the fields of 50 and 100 cm2.