t f Hematological Effects on Heavily Irradiated Japanese Fishermen » M. (1956): ibid. : { order of 350R to 400R (Tusrana, M. and LALANNE, C. M., Annales de Radio- i it of Radioactive logie, 6, 561, (1963) and in Effects of Ionizing Radiation on the haematopo- nna. ietic tissue, Int. At. En. Ag., Vienna edical Survey of t after 10 Year 5 » sO¥AMA, Y. and s of the Nuclear stion of Science, (1967))}. We have compared our curves with the curves of Yugoslavian accident cases, and here again we found the same difference, and our interpretation of these data was that probably the difference between the irradiated cases and the purposely irradiated patients was that in the irradiated 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 less, and of the order of 30 per cent. Dr. Kumatoni: I agree with your , F mica, 18 379, tional Congress Zensho, 3, 660 id > opinion. In my cases, I think, the ‘ases, we used leeding time is and in I or 2 ng time at the ng as about 10 came back to 2? 3 OF so after 1 I have no about the fibogen concent- . tion, I would like if he has an. vas the dose Ymen. I ask se we have a ( total-bod sidney trang. . and there etween our e have also, lasia of the tlier in our so occurs ie is that the ‘ukocytes js ee TT Ae he ei 5 ONIENE ee Pepe te sere ne ee mal from the es, being of kocytes per dose of the wee eg soma e ae ete tes - pe TRY CES he ge ess aS 407 ede. we es aerate ge eR?y a 5 ene id Meese whemaike 73 main irradiation came from externally deposited sources—gamma_irradiation. This irradiation. is a type of uniform And this irradiation played an important role in the hema- tological changes. The fallout material began to precipitate at 7:00 a.m. and continued to fall for about 5 hours. Therefore, the radiation dose to fishermen was at first smajl and then rapidly increased. As thefishermen began to clean up at about 12: 00, the exposure rate decreased thereafter. They wereirradiated continuously for 2 weeks with decreasing dose rates. Aside from this external irradiation, internal exposure may have had some effects. But the internal irradiation seemed to have only a slight effect on the acute hematological changes.