Radiation Injury and Recovery in Swine

It may be assumed that radiation injury is composed of at least two components, one of which is irreparable. It may be assumed further that the irreparable injury may be measured by its additive effect on subsequent exposure to ionizing radiations, and that after a postirradiation period of 90 days all the injury remaining is irreparable except for an insignificant amount of slowly reparable components. With these assumptions this experiment was planned to measure directly the injurious effect of sublethal doses of -y-radiation in terms of life shortening. The life span of all the experimental animals was to be shortened by a daily exposure of