Not sure how to interpret your dose report? Use this guide to help you understand the key terms and data presented.
Explanation of terms
Control monitor
The control monitor is included free of charge with each monitor delivery to measure natural background radiation where the wearers’ monitors are stored. This background radiation is subtracted from the wearer’s monitor reading by our lab to calculate their occupational dose.
Dose last twelve months
The total dose recorded for the wearer over the 12 months ending on the report date, used to compare a worker’s dose against the relevant dose limit.
Hp(0.07) – Skin dose
The dose equivalent at 0.07 mm depth in tissue. The annual dose limit is 500 mSv.
Hp(10) – Whole body dose
The dose equivalent at 10 mm depth in tissue. The annual dose limit is 20 mSv.
Minimum reportable dose (MRD)
The lowest occupational dose that can be reported with statistical confidence, based on the Limit of Quantification from IAEA/AQ/48.
Occupational dose
The dose calculated for a wearer by subtracting the control monitor’s background radiation reading from the wearer’s monitor reading.
Dose report FAQs
An unworn monitor received a dose – why?
If an unworn monitor is stored in a location with higher background radiation than where the control monitor is stored, it may register a dose. To avoid this, store unworn monitors with the control monitor, away from radiation sources but not in a shielded container, as they need to record the natural background radiation in that location. See our control monitor page for location recommendations.
Why are some wearer names missing from my dose report?
Only monitors that are returned are included in the report. If a name is missing, the monitor was not returned with its control group. Monitors that have not been returned can be viewed in the portal.
A monitor shows 'not reported' – what does this mean?
There are three possible reasons why a dose may not be reported. Refer to the symbol in the comments column of your dose report, which corresponds to an explanation on the last page.
