Histological effects of low dose-rate gamma-irradiation. II. Observations in rats after 400 rad total-dose irradiation.
Several days after 400 rad low (0.59 to 0.63 rad/min) dose-rate gamma-irradiation, minor histological injuries are observed in some of the radiosensitive organs of rats in contrast to the same dose of acute irradiation after the same interval. The earlier initiation and the more accelerated pace of regeneration, as against acute irradiation, are playing a role in the less severity of injuries, though its significance is not so unequivocal as at higher radiation doses.
D000818:Animals; D001853:Bone Marrow / Q000528:radiation effects; D007421:Intestine, Small / Q000528:radiation effects; D008297:Male; D011829:Radiation Dosage; D011832:Radiation Injuries / Q000473:pathology*; D051381:Rats; D013154:Spleen / Q000528:radiation effects; D013950:Thymus Gland / Q000528:radiation effects; D013997:Time Factors