A system of determining entrance surface doses (ESDs) from diagnostic
X-ray examinations is described. It is shown that the radiation yield
calibrations of X-ray units (mu Gym(2)mAs(-1)) can be based on very si
mple measurements with TL dosimeters. Comparisons of determined ESDs w
ith the guidelines of international organizations are carried out with
the aim of demonstrating the idea of how these values can be utilized
in limiting patient doses.