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Type: Journal article
Title: Impact of rare earth element added filters on the X-ray beam spectra: a Monte Carlo approach
Author: Eskandarlou, A.
Jafari, A.
Mohammadi, M.
Zehtabian, M.
Faghihi, R.
Shokri, A.
Pourolajal, J.
Citation: Journal of X-Ray Science and Technology: Clinical Applications of Diagnosis and Therapeutics, 2014; 22(4):459-470
Publisher: IOS Press
Issue Date: 2014
ISSN: 0895-3996
Statement of
Amir Eskandarlou, Amir Abbas Jafari, Mohammad Mohammadi, Mehdi Zehtabian, Reza Faghihi, Abbas Shokri and Jalal Pourolajal
Abstract: The effectiveness of added filters including conventional and rare earth materials for dental radiography tasks was investigated using a simulation approach. Current study focuses on the combination of a range of various filters to investigate the reduction of radiation absorbed dose and improving the quality of a radiography image. To simulate the X-ray beam spectrum, a MCNP5 code was applied. Relative intensity, beam quality, and mean energy were investigated for a typical dental radiography machine. The impact of different rare-earth materials with different thicknesses and tube voltages on the X-ray spectrum was investigated. For Aluminum as a conventional filter, the modeled X-ray spectra and HVL values were in a good agreement with those reported by IPEM. The results showed that for a 70 kVp voltage, with an increase of the thickness and atomic number of a given added filters, an increase of HVL values were observed. However, with the increase of the attenuator thickness, X-ray beam intensity decreases. For mean energy, different results were observed. It was also found that rare earth made filters reduce high energy X-ray radiation due to k-edge absorption. This leads to an ideal beam for intra-oral radiography tasks. However, as a disadvantage of rare earth added filters, the reduction of the tube output levels should also be considered.
Keywords: Dental radiography
diagnostic X ray
rare earth elements
Rights: © 2014 – IOS Press and the authors. All rights reserved.
DOI: 10.3233/XST-140438
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