Chest X-rays of newborns in a medical facility: variation between the entrance skin dose measurements using the indirect and direct methods for clinical dose audit.

Purpose: This study aims to determine the mean and 75th percentile entrance skin dose (ESD) from anteroposterior (AP) chest X-rays using machine parameters (indirect method). Also, a comparison was made between the ESD and already determined thermoluminescent dosimeter (TLD) measurements (ESD) from a previous study from the same patients' data. In addition, the results were compared to similar articles, where the direct and indirect methods were used in estimating ESD to newborns.