Monte Carlo dose index estimation in computed tomography

• Main Authors: Moncef ATI, Rachid BOUAMRANE, Djamel ADDI, Fatima Zohra MAROC, Fatima Zohra Mecheret
• Format: Article
• Language: English
• Published: AIMS Press 2020-11-01
• Series: AIMS Bioengineering
• Subjects: monte carlo; simulation; absorbed dose; ctdi; ct; dosimetry
• Online Access: http://www.aimspress.com/article/10.3934/bioeng.2020019/fulltext.html

We numerically study the computed tomography dose index (CTDI) quantity based on the Monte Carlo method using GATE software. In this work, it was demonstrated that the CTDI values decreased following an exponential form as a function of phantom diameter. As expected, the absorbed dose is shown to have a good relationship which increases linearly with X-ray tube current (mAs) values. The simulation presented in particularly that the (CTDI) dose increases not-linearly dependence with photon deposited energy (kVp). It seems that the average percent of the absorbed dose in the abdominal phantom was lower than the heat phantom object’s absorbed dose, which was equal to 80%. In conclusion, the use of Monte Carlo simulation represents a dosimetry tool for radiation protection in the field of radiology imaging.