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Impact of Upgraded in Vivo Lung Measurement Capability on an Internal Dosimetry Program

机译：升级的体内肺部测量能力对内部剂量测定计划的影响

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Implementation of high-purity germanium (Ge) detectors in place of sodium iodide (NaI) detectors for in vivo lung measurements of low-energy photon-emitting radionuclides resulted in significant improvement in detection capability and corresponding improvements in the monitoring of potentially exposed workers. Lung activities below those detectable with the NaI system were discovered during the first 18 months of operation. In a number of cases, these activities were estimated to represent intakes resulting in lung doses as high as 25% of the 15 rem/y United States Department of Energy Radiation Protection Standard. Evaluation of these lung activities and their associated intakes was substantially more time consuming than originally anticipated due to calibration differences between the Ge and NaI systems and to the difficulty of completing some of the follow-up investigations. (ERA citation 11:034940)

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