Evaluation Of Artifacts Generated By Zirconium Implants In Cone-beam Computed Tomography Images

dc.creatorVasconcelos
dc.creatorTaruska Ventorini; Bechara
dc.creatorBoulos B.; McMahan
dc.creatorClyde Alex; Freitas
dc.creatorDeborah Queiroz; Noujeim
dc.creatorMarcel
dc.date2017
dc.datefev
dc.date2017-11-13T13:45:14Z
dc.date2017-11-13T13:45:14Z
dc.date.accessioned2018-03-29T05:59:54Z
dc.date.available2018-03-29T05:59:54Z
dc.identifierOral Surgery Oral Medicine Oral Pathology Oral Radiology. Elsevier Science Inc, v. 123, p. 265 - 272, 2017.
dc.identifier2212-4403
dc.identifier1528-395X
dc.identifierWOS:000397025400019
dc.identifier10.1016/j.oooo.2016.10.021
dc.identifierhttp://www.sciencedirect.com/science/article/pii/S2212440316306605
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/328958
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1365983
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionTo evaluate zirconium implant artifact production in cone beam computed tomography images obtained with different protocols. Study Design. One zirconium implant was inserted in an edentulous mandible. Twenty scans were acquired with a ProMax 3D unit (Planmeca Oy, Helsinki, Finland), with acquisition settings ranging from 70 to 90 peak kilovoltage (kVp) and voxel sizes of 0.32 and 0.16 mm. A metal artifact reduction (MAR) tool was activated in half of the scans. An axial slice through the middle region of the implant was selected for each dataset. Gray values (mean +/- standard deviation) were measured in two regions of interest, one close to and the other distant from the implant (control area). The contrast-to-noise ratio was also calculated. Results. Standard deviation decreased with greater kVp and when the MAR tool was used. The contrast-to-noise ratio was significantly higher when the MAR tool was turned off, except for low resolution with kVp values above 80. Selection of the MAR tool and greater kVp resulted in an overall reduction of artifacts in images acquired with low resolution. Conclusions. Although zirconium implants do produce image artifacts in cone-bean computed tomography scans, the setting that best controlled artifact generation by zirconium implants was 90 kVp at low resolution and with the MAR tool turned on.
dc.description123
dc.description2
dc.description265
dc.description272
dc.descriptionCoordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES) Foundation (Brazil)
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.languageEnglish
dc.publisherElsevier Science Inc
dc.publisherNew York
dc.relationOral Surgery Oral Medicine Oral Pathology Oral Radiology
dc.rightsfechado
dc.sourceWOS
dc.subjectIn-vitro Assessment
dc.subjectMaxillofacial Radiology
dc.subjectCt
dc.subjectReduction
dc.subjectTitanium
dc.subjectAlgorithm
dc.subjectAcademy
dc.titleEvaluation Of Artifacts Generated By Zirconium Implants In Cone-beam Computed Tomography Images
dc.typeArtículos de revistas


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