Hematological Effects on Heavily Irradiated Japanese Fisherm~>-. 4, M. (1956): ibid, order of 350R to 400R (Tuatana, M. and LALANNE, C. M., Annales de Radio- logie, 6, 561, (1963) and in Effects of Ionizing Radiation on the haematopo- ‘nt of Radioactiv e jetic tissue, Int. At. En. Ag., Vienna enna ‘fedical (1967)). We have compared our curves with the curves of Yugoslavian accident Survey of itt after 10 Years, cases, and here again we found the same difference, and our interpreta- »., Korama, Y. and es of the Nuclear 10tion of Science, tion of these data was that probably the difference between the irradiated cases and the purposely irradiated patients was that in the irradiated IOnica, 18, 379, ‘ational Congress patients the dose was very uniform, with a maximum variation of plus or minus 4 per cent, whereas in the case of accidents the uniformity was much Zensho, 3, 660, Jess, and of the order of 30 per cent. Dr. Kumatorr: I agree with your nogen concent- rmal from the ination i: I would like t if he has an was the dose fermen. J ask use we have a of total-body kidney trans- its, and there between your ve have also, plasia of the atlier in oyy y also occurs ane is that the leukocytes jg ises, being of ukocytes per \ dose of the Tr Oy te ea ie 5 about the fib- . th I have no 2D dl ee eR PalAy RE a ee ee Ong as about 10 S came back to eeks or so after TORTS cases, we used bleeding time is and in 1 or 2 ling time at the _ opinion. In my cases, I think, the 73 main irradiation came from externally deposited sources—~gamrma_ irradia- tion. This irradiation. is a And type this of uniform irradiation played an important role in the hema- tological changes. The failout material began to precipitate at 7:00 a.m. and continued to fal! for about 5 hours. Therefore, the radiation dose to fishermen was at first small and then rapidsy increased. As the fishermen began to clean up at about 12:00, the exposure rate decreased thereafter. They were irradiated continuously for 2 weeks with decreasing dose rates. Aside from this external irradiation, internal exposure mayhave had some effects. But the internal irradiation seemed to have onlya slight effect on the acute hematological changes.