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Radiation Protection Dosimetry Advance Access originally published online on April 27, 2006
Radiation Protection Dosimetry 2006 121(3):275-283; doi:10.1093/rpd/ncl045
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© The Author 2006. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

A family of statistical distributions for modelling occupational radiation doses in low dose occupations

Willem N. Sont*

Radiation Protection Bureau, 775 Brookfield Road, AL 6302C2, Ottawa, ON, Canada K1A 1C1

* Corresponding author: willem_n_sont{at}hc-sc.gc.ca

Received July 29, 2005, amended December 21, 2005, accepted March 19, 2006


  Abstract

New statistical distributions have been defined to describe occupational exposures to ionising radiation. These distributions are particularly useful in modelling occupations where most doses are low. The maximum likelihood method was used for parameter estimation and has been adapted to allow doses that are recorded as zero to be included in the calculations. The method can then be applied to estimate true doses from the complete set of recorded dose values when the a priori dose distribution and the dose measurement distributions have been derived previously. This application is important in epidemiological cohort studies where it can improve the accuracy of excess relative risk estimates.


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