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https://hdl.handle.net/2440/96561
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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 1095-9114 |
Statement of Responsibility: | 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 |
Published version: | http://dx.doi.org/10.3233/xst-140438 |
Appears in Collections: | Aurora harvest 3 Physics publications |
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