Measurement of eye lens doses estimation in interventional radiology

Abstract

International Commission of Radiological Protection (ICRP) Publication number 118 at 2012 recommends decreasing the Dose Limit Value of eye lens for workers from 150 mSv to 20 mSv in 1 year, and to not exceed 50 mSv in a certain year. This experiments is aimed to evaluate the value of eye lens radiation dose based on the effect of angles on the monitor in interventional radiology by using a head phantom as a simulation of the workers’ position with a height of 150 cm, 160 cm and installed thermoluminescent dosimeter (TLD) chips Hp (10) at 66 - 67 kV and 385 - 395 mA. The radiation lens dose value during 1 minute fluoroscopy irradiation results a mean of radiation dose value that ranges between 0,54 – 0,79 mSv and 0.52 - 0.70 mSv, during 4 minutes fluoroscopy irradiation ranges between 0,48 – 0,72 mSv and 0.55 - 0.75 mSv, and during 10 seconds cinefluorography ranges between 0.52 – 0,75 mSv and 0.48 - 0.66 mSv. The relationship between the linearity of fluoroscopy irradiation time and dose area product (DAP) obtained an equation of y = 0.0139x-0.0535 with a correlation coefficient R2 = 0.9982. The relationship between the linearity of fluoroscopy irradiation time and Kinetic Energy Released per Mass unit (KERMA) obtained an equation of y = 0.0957x-0.0495 with a correlation coefficient R2 = 0.9988.