A COMPARATIVE STUDY OF ORGAN DOSES ASSESSMENT FOR PATIENTS UNDERGOING CONVENTIONAL X-RAY EXAMINATIONS: PHANTOM EXPERIMENTS VS. CALCULATIONS.

ABSTRACT

A series of phantom experiments were performed with the aim of estimating organ doses for patients undergoing conventional X-ray chest and pelvis examinations. The experiments were performed using physical phantoms corresponding to an adult and a 5-year-old child. Mean organ doses and entrance surface dose were measured using TL-dosemeters. The measured organ doses were compared with the data obtained by calculations using available software tools (EDEREX and PCXMC 2.0) based on the computational MIRD-5 stylized models. The differences between calculated and measured doses for organs located fully or partly in the primary radiation beam did not exceed ±33% with the probability of 95% for the tube voltage 60-140 kV both for an adult and a 5-year-old child phantom. This study suggests that EDEREX and PCXMC 2.0 can be used to estimate organ and effective dose for adult as well as pediatric patients undergoing conventional X-ray examinations.