Fig. 3

Entrance surface air kerma including backscatter of an AP pelvic radiograph over the years (n = 182). Please note the logarithmic y-axis. The solid line is a fit of a simple exponential function to all data (“exponential regression”) [61]
Entrance surface air kerma including backscatter of an AP pelvic radiograph over the years (n = 182). Please note the logarithmic y-axis. The solid line is a fit of a simple exponential function to all data (“exponential regression”) [61]