Abstract:
:The new dose limits recently adopted in Canada (and elsewhere in the world) have made it more difficult to detect some radionuclides by in vivo counting at the average dose limit of 20 mSv. This is particularly true for natural uranium. Two techniques have been developed by the Human Monitoring Laboratory to reduce the Minimum Detectable Activity (MDA) for the lung counting of this nuclide. The first technique, developed in collaboration with Cameco, is to either sum sequential counts of an individual or to sum spectra of a group of workers similarly occupationally exposed. This technique offers a reduction in the MDA of up to a factor of three. The second technique, developed in collaboration with CNEN, involves the summing of photopeaks within an individual spectrum and offers a reduction in the MDA of up to a factor of two.
journal_name
Health Physjournal_title
Health physicsauthors
Kramer GH,Hauck BM,Allen SA,Dantas BM,Dantas AL,Azeredo AMdoi
10.1097/00004032-200308000-00012keywords:
subject
Has Abstractpub_date
2003-08-01 00:00:00pages
220-7issue
2eissn
0017-9078issn
1538-5159journal_volume
85pub_type
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