2016 Risk Course Book

37

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 Copenhagen – QC showed 5% deviation in output - was adjusted immedeatly o Linac OK but incorrect calibration factor for ion chamber – detected after several weeks even if in-vivo dosimetry was in placed (however, lack of comprehensive analysis) o No second physicist checked QC  Ottawa – Recommissioning of unit after move – missed back scatter factors o No second physicist o Detected when annual QC was done  Touluse/Ohio – Commissioning of SRT with unsuitable ion chamber

o No second physicist o Detected by company

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2016-10-05

T Knöös