X-RAY DOSE ESTIMATION FROM CATHODE RAY TUBE MONITORS BY MONTE CARLO CALCULATION

被引：0
作者：
Khaledi, Navid [1 ]
Arbabi, Azim [2 ]
Dabaghi, Moloud [1 ]
机构：
[1] Islamic Azad Univ, Dept Radiat Med, Sci & Res Branch, Tehran, Iran
[2] Shahid Beheshti Med Univ, Imam Hossein Hosp, Dept Med Phys, Tehran, Iran
来源：
HEALTH PHYSICS | 2015年 / 108卷 / 04期
关键词：
dose equivalent; effective; dosimetry; Monte Carlo; x ray; DISPLAY TERMINALS; RADIATION;
D O I：
10.1097/HP.0000000000000221
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Cathode Ray Tube (CRT) monitors are associated with the possible emission of bremsstrahlung radiation produced by electrons striking the monitor screen. Because of the low dose rate, accurate dosimetry is difficult. In this study, the dose equivalent (DE) and effective dose (ED) to an operator working in front of the monitor have been calculated using the Monte Carlo (MC) method by employing the MCNP code. The mean energy of photons reaching the operator was above 17 keV. The phantom ED was 454 mu Sv y(-1) (348 nSv h(-1)), which was reduced to 16 mu Sv y(-1) (12 nSv h(-1)) after adding a conventional leaded glass sheet. The ambient dose equivalent (ADE) and personal dose equivalent (PDE) for the head, neck, and thorax of the phantom were also calculated. The uncertainty of calculated ED, ADE, and PDE ranged from 3.3% to 10.7% and 4.2% to 14.6% without and with the leaded glass, respectively.
引用
收藏
页码：401 / 406
页数：6
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