Effect of Exposure Parameters on Metal Artifacts in Cone Beam Computed Tomography
Objectives: The aim of this study was to assess the effect of tube current, kilovoltage peak (kVp), metal type, and the position of metal objects on metal artifacts in cone-beam computed tomography (CBCT) images. Materials and Methods: Titanium and cobalt-chromium rods were fabricated and placed in...
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Tehran University of Medical Sciences
2016-12-01
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doaj-9f6482f3219f4d56a8caef78729004f42020-11-25T03:54:58ZengTehran University of Medical SciencesFrontiers in Dentistry2676-296X2016-12-01133860Effect of Exposure Parameters on Metal Artifacts in Cone Beam Computed TomographyMehrdad Panjnoush0Yasaman Kheirandish1Pooneh Mohseni Kashani2Hoorieh Bashizadeh Fakhar3Farzan Younesi4Maysa Mallahi5Assistant Professor, Department of Oral and Maxillofacial Radiology, School of Dentistry, Tehran University of Medical Sciences, Tehran, IranAssistant Professor, Department of Oral and Maxillofacial Radiology, School of Dentistry, Tehran University of Medical Sciences, Tehran, IranPostgraduate Student, Department of Oral and Maxillofacial Radiology, School of Dentistry, Tehran University of Medical Sciences, Tehran, IranAssistant Professor, Department of Oral and Maxillofacial Radiology, School of Dentistry, Tehran University of Medical Sciences, Tehran, IranAssistant Professor, Department of prosthodontics, Faculty of Dentistry, Azad University, Tehran, IranPostgraduate Student, Department of Oral and Maxillofacial Radiology, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran Objectives: The aim of this study was to assess the effect of tube current, kilovoltage peak (kVp), metal type, and the position of metal objects on metal artifacts in cone-beam computed tomography (CBCT) images. Materials and Methods: Titanium and cobalt-chromium rods were fabricated and placed in a dry human mandible. Samples were scanned using a Promax 3D CBCT unit with different milli-amperages and kVp. The artifacts induced by metal objects were evaluated using the Image J software in four regions of interest (ROIs) on each image. Results: A higher kVp decreased artifacts of the buccal surface of the rods in 97% of the cases (P=0.046) but did not affect the severity of artifacts between the two metal objects (P>0.05). Increasing the tube current had no effect on metal artifacts in 93% of the cases (P>0.05). Artifacts induced by a cobalt-chromium alloy were more severe than those with titanium (P<0.001). Artifacts were more intense in the buccal surface of anterior rods compared to the posterior rods (P<0.003). Conclusions: Tube voltage, metal type and the position of metal objects affected the severity of metal artifacts on CBCT images. The metal type had the greatest effect on metal artifact intensity in this study. https://jdt.tums.ac.ir/index.php/jdt/article/view/1342cone-beam computed tomographyartifactsmetals |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Mehrdad Panjnoush Yasaman Kheirandish Pooneh Mohseni Kashani Hoorieh Bashizadeh Fakhar Farzan Younesi Maysa Mallahi |
spellingShingle |
Mehrdad Panjnoush Yasaman Kheirandish Pooneh Mohseni Kashani Hoorieh Bashizadeh Fakhar Farzan Younesi Maysa Mallahi Effect of Exposure Parameters on Metal Artifacts in Cone Beam Computed Tomography Frontiers in Dentistry cone-beam computed tomography artifacts metals |
author_facet |
Mehrdad Panjnoush Yasaman Kheirandish Pooneh Mohseni Kashani Hoorieh Bashizadeh Fakhar Farzan Younesi Maysa Mallahi |
author_sort |
Mehrdad Panjnoush |
title |
Effect of Exposure Parameters on Metal Artifacts in Cone Beam Computed Tomography |
title_short |
Effect of Exposure Parameters on Metal Artifacts in Cone Beam Computed Tomography |
title_full |
Effect of Exposure Parameters on Metal Artifacts in Cone Beam Computed Tomography |
title_fullStr |
Effect of Exposure Parameters on Metal Artifacts in Cone Beam Computed Tomography |
title_full_unstemmed |
Effect of Exposure Parameters on Metal Artifacts in Cone Beam Computed Tomography |
title_sort |
effect of exposure parameters on metal artifacts in cone beam computed tomography |
publisher |
Tehran University of Medical Sciences |
series |
Frontiers in Dentistry |
issn |
2676-296X |
publishDate |
2016-12-01 |
description |
Objectives: The aim of this study was to assess the effect of tube current, kilovoltage peak (kVp), metal type, and the position of metal objects on metal artifacts in cone-beam computed tomography (CBCT) images.
Materials and Methods: Titanium and cobalt-chromium rods were fabricated and placed in a dry human mandible. Samples were scanned using a Promax 3D CBCT unit with different milli-amperages and kVp. The artifacts induced by metal objects were evaluated using the Image J software in four regions of interest (ROIs) on each image.
Results: A higher kVp decreased artifacts of the buccal surface of the rods in 97% of the cases (P=0.046) but did not affect the severity of artifacts between the two metal objects (P>0.05). Increasing the tube current had no effect on metal artifacts in 93% of the cases (P>0.05). Artifacts induced by a cobalt-chromium alloy were more severe than those with titanium (P<0.001). Artifacts were more intense in the buccal surface of anterior rods compared to the posterior rods (P<0.003).
Conclusions: Tube voltage, metal type and the position of metal objects affected the severity of metal artifacts on CBCT images. The metal type had the greatest effect on metal artifact intensity in this study.
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topic |
cone-beam computed tomography artifacts metals |
url |
https://jdt.tums.ac.ir/index.php/jdt/article/view/1342 |
work_keys_str_mv |
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