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Lessons
One clear lesson from this is that calibration of a new cobalt source/linac
must be checked and rechecked (and rechecked…)
o
One may wish that a suppliers could specify the likely output of the
source (compare brachytherapy)
It is certainly possible to cross check a new installation in this way, and it
might even be sensible to repeat the calibration of a new source a month
after its first use in case of contamination with other isotopes which might
have unexpected patterns of decay.
External (internal) audit
35
2016-10-05
T Knöös