Aboard Dose Assessment in Dual Energy X-ray Vehicle Inspection by Use of Experimental Measurement in Human Rando Phantom

One of the most effective and comprehensive ways to deal with security risks as well as smuggling of contraband including drugs is using Dual Energy X-ray inspection devices with the capability of materials classification. An important parameter in relation to the use of these devices in the vehicle inspection is the car driver and sensitive body organs dose which can lead to person’s diseases caused by radiation. The aim of this study is the risk assessment for car driver in each scan and also determination of maximum number passes through inspection device for a specified time based on individual doses per scan and the ANSI standard. By using a homespun and programmed car inspection dual-energy X-ray as well as using a Rando phantom of a man and TLD dosimeters, dosimetry was performed to assess the doses of overall and sensitive body organs at three energy situations of the X-ray tube, 155, 175 and 195 kVp. The results show that maximum dose is absorbed in the stomach and the mean total dose of car driver for 155, 175 and 195 kVp energy is 0.276. 0.315 and 0.338μSv respectively. With respect to the overall mean car driver dose (the 0.31μSv) and according to the ANSI standard, machine is known in the category of devices with limited utility. Anyone can pass through this machine in maximum for a year, a month and a week 806, 66 and 15 times respectively and more scan could lead to radiation biohazards according to ANSI standard.