Table 1. Estimated Dose of Whole Body Gamma Radiation Subject No. ; Ist Day | T-1 T-2 240~ 290 R 210~260 $50~500R 390~440 | T-5 400~430 660~690 | T-7 T- 8 K- 1 K- 2 K- 3 K- 4 K- 5 K- 6 140~190 310~360 190~220 130~180 HO~190 lv~170 140~190 | 180~ 230 | 220~270 520~570 310~340 | 200~250 | 2305280, 190~240 | 220~270 | 300~350 | T-3 T-6 K-7 K- 8 150~200 }30~180 230~280 220~270 K- 9 K-10 K-11 K-12 Total | 260~310* | (360~410) 200~230 K-15 | H0~190 1¥0~170 ol 210~260 | 190-~240 | _ * T-3 put the fall-out material close to his bed. Therefore, about 100R should be added in total. "Ba contributed 4-2026 of radioactivity at that time. The radioactivity decreased extremely rapidly, e.g. at about 6 months after the detonation, the activity in the urine was barely detectable. After 84 years, the levels of ‘Cs in urine/24¢ hrs. were the same to that of normal persons. Radiochemical analysis of several organs from the fatal case, which died on 23 September 1954, showed that, comparing with the controls, radioactivity of these organs was clearly higher, although it was not extremely high.'” Whole body counting was performed on three persons 84 years after the initial exposure. No sienificant difference was found between the curves of the three irradiated persons and the curve of the control. B. Clinical Observations l. navsea *., ond em ~ vomiting Qo am 100 23 | 420~300 | 510~590 | | | 170~220 | | 250-~300 | 370420; K-16 Q 310~360 | 530 ~600 140~190 | 230~280— 120~170 | 170~220 1WO~150 | 234+ ~ 340~390 | 380~430 — K-13 K-14 100- Symptoms and Signs oO Dote - ~~ ie [= ~~ sod ace 1-5 6-10 t1-15 16-2021-2627-1 March Fig. 1. 1 2-$ 7-11 12-12 Aprit Symptons and Sigus 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. T- 3 eczema (1957-1960), pneumonia (1963) K- + erosion of r. external ear (1962), im- petigo (1963) K- 8 r. pulmonary phthisis (1955)* K-10 r. exsudative pleuritis (1959)*, Furunculosis (1960) K-16 acute appendicitis (1957) 2. Skin Lesions 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.