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KMID : 0357520180410030215
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Journal of Radiological Science and Technology
2018 Volume.41 No. 3 p.215 ~ p.221
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Assesment of Absorbed Dose of Organs in Human Body by Cone Beam Computed Tomography using Monte Carlo Method
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Kim Jong-Bo
Im In-Chul
Park Eun-Tae
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Abstract
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Cone beam Computed Tomography(CBCT) is an increasing trend in clinical applications due to its ability to increase the accuracy of radiation therapy. However, this leaded to an increase in exposure dose. In this study, the simulation using Monte Carlo method is performed and the absorbed dose of CBCT is analyzed and standardized data is presented. First, after simulating the CBCT, the photon spectrum was analyzed to secure the reliability and the absorbed dose of the tissue in the human body was evaluated using the MIRD phantom. Compared with SRS-78, the photon spectrum of CBCT showed similar tendency, and the average absorbed dose of MIRD phantom was 8.12 ~ 25.88 mGy depending on the body site. This is about 1% of prescription dose, but dose management will be needed to minimize patient side effects and normal tissue damage.
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KEYWORD
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CBCT, Monte Carlo, Spectrum, MIRD Phantom, Absorbed Dose
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