• 1 January 1980
    • journal article
    • research article
    • Vol. 28  (1) , 9-18
Abstract
Simultaneous determinations of the spleen weight loss, and thymus and femoral bone marrow cell depletion at approximately 45 h after whole-body irradiation were a simple, rapid, sensitive and economical way of quantitating radiation damage to the mouse hemopoietic system. Within the dose range of 45-300 rad of 250 kV X-rays the log of the radiation effect for all 3 end-points was proportional to the log dose, with the extrapolated common threshold dose of 29 .+-. 3 rad and 50% decrease relative to control values following 330 (extrapolated), 54 and 109 rad in the spleen wt, and thymus and bone marrow cellularities, respectively.