Evaluation Of Patient Organ And Effective Doses From Selected Lnterventional Radiology Procedures: The Radiation Protection Point Of View

Abstract

The objective of this study was to assess patient organ and effective doses from the selected interventional radiology procedures and propose effective dose prediction strategies. This objective was achieved by surveying dose area product and peak skin doses for three interventional radiology procedures (endovascular aortic aneurysm repair, stenting of femoropopliteal and transarterial chemoembolization). Organ and effective doses were assessed and a mathematical relation for predicting effective dose from dose-area-product has been established for each of the three interventional radiology procedures. Also, percentage differences between two dose assessment protocols (ICRP 60 and ICRP 103) was estimated. The study was undertaken by performing Monte Carlo (PCXMC version 2) simulations of dose data of ninety-nine (99) patients who underwent the interventional procedures. The dose data was analyzed with ICRP 60 and ICRP 103 dose assessment protocols. The study revealed that mean effective doses for endovascular aneurysm repair, stenting of femoropopliteal and transarterial chemoembolization were 28.495, 1.969 and 20.278 mSv; 23.985, 1.429 and 17.644 mSv; respectively for ICRP 60 and ICRP 103 protocols. This means that percentage difference between the ICRP 60 and ICRP 103 protocols were respectively 15.8,27.4 and 13.0%. From outcome of the study, it is recommended that the derived mathematical equations from this study could be adopted and used as predictor tool to estimate effective doses of patients before the interventional radiology procedure is undertaken. Also, in the assessment of radiation doses in interventional radiology procedures, ICRP 103 protocol should be used instead of ICRP 60 protocol.