Population Mean Marrow Dose and Leukaemia Significant Dose from Diagnostic Medical X-ray Examinations in Japan, 1969

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Abstract
The 1969 population mean marrow dose and leukaemia significant dose from diagnostic medical X-ray examinations in Japan were estimated. The estimation was made based on a nation wide survey reported elsewhere. The bone marrow dose was measured using thermoluminescent dosimeters embedded in bone marrow sites in phantoms. The leukaemia significant dose was calculated according to a weighting factor, the use of which takes into account the shape of the time-incidence curve of radiation induced leukaemia, and the survival statistics for the various age groups in the population. The population mean marrow dose was 36.6, 26.8 and 126 mrad per person per year for radiography, photofluorography and fluoroscopy, respectively, with a total of 189 mrad. The leukaemia significant dose was 32.7, 24.6 and 112 mrad, with a total of 169 mrad per person per year.

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