Page 46 - Brachytherapy
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Source strength
Long half-life sources maintained within a permanent
inventory should be checked at some established frequency for
their change in source strength (activity) with time. Calculated
values, often obtained by decaying a prior calibration, should
be compared with measurements. Short half-life sources, used
either in temporary or permanent implants, should have their
activity measured at the time of receipt and compared with the
manufacturer’s value.
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