An Evaluation of Environmental Doses of Inspection Room of Angiography and Interventional Therapy

Abstract

Angiography is the most accurate method among vascular inspection methods. As angiography allows one to figure out the overall form of blood vessel and the degree to which it is clogged, it is essential to diagnose and treat vascular diseases like stroke, myocardial infarction and others.This study measured and analyzed spatial dose and integral dose by using environmental glass dosimeter at outer wall, door, patient-watching window (lead glass) of the inspection room where angiography and vascular interventional therapy equipments  are used.At the door of the x-ray generator control room, dose exceeding the natural radiation dose in the whole hospital was detected, with maximum leaked dose 3.30 mSv, minimum leaked dose 0.24 mSv, and mean leaked dose 0.89 mSv. Radiation leakages at the wall of control room, at the entrance door and wall of inspection room were not over natural radiation does. Spatial integral doses in the computer control space supporting and recording therapy and inspection were measured as 1.05 mSv, 0.36 mSv at the distance of 3m from X-ray tube. Spatial integral doses before penetrating the patient-watching window were measured as 2.37 mSv, 0.54 mSv, 2.07 mSv, 0.78 mSv, 0.00 mSv, 3.30 mSv, with mean dose 1.51 mSv. The shielding effectiveness of the patient-watching window was on average 96%.Such research findings are expected to serve as meaningful reference data in suggesting safety management policies and implementing safety management in clinical conditions.