Facility reference level distribution variation over time
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The curves below show the change in the median of the FRL distribution since the beginning of 2012 for different protocols. The graphs have been generated by examining the surveys submitted during a moving 12-month period, where the start and end points of the window have been shifted by daily intervals. The x-axis is the end date of the 12-month interval, the blue line is the median of the corresponding FRL distribution, the red line denotes the current DRL and the light blue region indicates the 25th – 75th percentile range.
Note that the cervical spine, KUB and soft-tissue neck data are not included because the protocols have only been introduced recently.
Head
Chest
Chest-abdomen-pelvis
Abdomen-pelvis
Lumbar spine
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