Abstract
Some of the quality assurance tasks of whole-body counting are specific to that method of measurement, whereas others are similar to those of gamma spectrometric sample measurements. Quality assurance in whole-body measurement and the associated calculation of internal doses is a complex matter. The uncertainty in the measurement geometry between the radiation source and the detector is unavoidable when measuring humans. Quality assurance includes quality control with procedure and protocol descriptions, detector calibrations, instrument control, documentation of measurement results and evaluation internally or by outside persons. This evaluation also involves regularly repeated comparative measurements. An intercomparison study in the Nordic countries was carried out using a phantom that corresponded to a person weighing 62 kg. The radionuclides used were 60 Co, 137 Cs and 40 K. The phantom was circulated to seventeen laboratories. The results agreed well with the reference values. The results from this project showed that the preparedness for performing body and organ measurements in emergency situations has improved greatly since the Chernobyl reactor accident.
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