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1
10
100
1000
10000
0,1
1
10
100
1000
10000
Cancer deaths /year/1M people
Dose (mGy)
natural cancer
mortality
additional cancer
deaths due to
radiation
Data from Hiroshima
Nagasaki and 131-I
Thyroid studies
?
Annual
Background
CT scan
Chest
X-ray
RT
Fraction
Epidemiology of Cancer Risks
LIFE SPAN STUDY
Only ~5% of 7800 deaths from cancer or leukaemia due to radiation