Table 1. Estimated Dose of Whole Body Gamma Radiation Ny Subject No. Ist Day Total T-1 T-2 T-3 T-5 T-6 T-7 T- 8 240~290R}| 210~260 150~200 400~430 130~ 180 140~190 310~360 450~500R 390~440 260~310* (360~410) 660~690 200~250 220~270 520~570 k- 1 190~220 310~340 K- 2 130~ 180 200~ 250 K- 3 140~ 190 230~ 280 K- 4 120~170 190~240 K- 5 140~ 190 220~270 K- 6 180~ 230 300~350 K-7 230~ 280 340~390 K- 8 220~270 380~430 kK- 9 K-10 K-11 310~360 140~190 120~ 170 550~600 230~ 280 170~220 K-12 K-13 K-14 100~ 150 250~300 420~ 500 170~220 370~ 420 510~390 K-15 140~ 190 210~260 K-16 120~170 190~240 -} * J-3 put the fall-out material close to his bed. Therefore, about 100R should be added in total. ‘Ba contributed 4-202% of radioactivity at that time. The radioactivity decreased extremely rapidly, e.g. at about 6 monthsafter the detonation, the activity in the urine was barely de- % No. 100 23 20 751s r 0 r ok 25}- Sr fever more thon 38°C - ol o pownn. ~ ~s Od 23+ 20r 75 \ Sr SOF 25ol tor \ N ‘ sh 0 100K 23k 20k 75-7 50h $F OF 25-5 ol oO Dote . 7 / haemorrhage March Fig. 1. conjunetivits ‘ Loa, Cd ° Aad 4 C= at eae 1-5 6-10 11-15 16-2021-2627-1 Wo smee" 1 1 “sS 2-6 7-11 12-12 Apel Symptons and Signs in the Early Stage Soon after the initial exposure most of the patients experienced anorexia, fatigue and lachrymation, etc. These symptoms and their changes are illustrated in Fig. 1. The diseases occurred between 1955 and 1963 are listed in the following. showed that, comparing with the controls, radio- T- 3 eczema (1957-1960), pneumonia (1963) K~ + erosion of r. external ear (1962), impetigo (1963) K- 8 r. pulmonary phthisis (1955)* K-10 r. exsudative pleuritis (1959)*, Furun- “ culosis (1960) . activity of these organs was clearly higher, al- K-16 acute appendicitis (1957) tectable. After 84 years, the levels of ‘Cs in urine/24+ hrs. were the same to that of normal persons. Radiochemical analysis of several organs from the fatal case, which died on 23 September 1954, though it was not extremely high.'? Whole body counting was performed on three persons 8} years after the initial exposure. No significant difference was found between the curves of the three irradiated persons and the curve of the control. B. Clinical Observations 1. Symptoms and Signs 2. Skin Lesions ore Skin lesions occurred due to beta radiation. - An estimate of the radiation dose to the skin was difficult. Shortly after the exposure, they suffered from erythema which was followed by edema, vesicle, erosion, ulceration or necrosis. * These were diagnosed by Dr. Kumatori. The others were due to complaints of the patients.