Quantitative analysis of metallic artifacts caused by dental metals: comparison of cone-beam and multi-detector row CT scanners

ObjectivesTo quantitatively compare the streak artifacts produced by dental metals in a cone-beam computed tomography (CBCT) device and a multi-detector row computed tomography (MDCT) scanner in relation to metal types and imaging parameters.MethodsCubes of aluminum, titanium, cobalt–chromium alloy, and type IV gold alloy were scanned with CBCT and MDCT scanners at tube voltages of 80 and 100 peak kV (kVp), and currents of 100 and 170 mAs by MDCT, and 102 and 170 mAs by CBCT. Artifact areas were quantified using ImageJ software.ResultsArtifact areas for the same metals and imaging parameters were smaller with CBCT than with MDCT under most conditions. Type IV gold alloy caused the largest artifact areas, followed by cobalt–chromium alloy, titanium, and aluminum, respectively. Higher tube voltage was associated with smaller artifact areas under most conditions, whereas increasing tube current had no consistent effect on artifact area using either CT device.ConclusionsCBCT was associated with smaller artifact areas than MDCT for the same parameters. Type IV gold alloy produced the largest artifact areas among the tested metals, but metallic artifacts could be reduced by increasing the tube voltage.

[1]  Jay S. Kim,et al.  Common orthodontic appliances cause artifacts that degrade the diagnostic quality of CBCT images. , 2007, Journal of the California Dental Association.

[2]  M. Yaremchuk,et al.  An electronic device for surgical glove testing. , 1993, Plastic and reconstructive surgery.

[3]  M. V. van Leeuwen,et al.  Minimizing clip artifacts in multi CT angiography of clipped patients. , 2006, AJNR. American journal of neuroradiology.

[4]  Yoshihiko Hayakawa,et al.  Iterative correction applied to streak artifact reduction in an X-ray computed tomography image of the dento-alveolar region , 2010, Oral Radiology.

[5]  K Freeman,et al.  CT scans through metal scanning technique versus hardware composition. , 1994, Computerized medical imaging and graphics : the official journal of the Computerized Medical Imaging Society.

[6]  Lei Dong,et al.  Reducing metal artifacts in cone-beam CT images by preprocessing projection data. , 2007, International journal of radiation oncology, biology, physics.

[7]  Ja-Young Choi,et al.  Metal Artifact Reduction by the Alteration of Technical Factors in Multidetector Computed Tomography: A 3-Dimensional Quantitative Assessment , 2008, Journal of computer assisted tomography.

[8]  Thomas Flohr,et al.  Metallic prosthesis: technique to avoid increase in CT radiation dose with automatic tube current modulation in a phantom and patients. , 2005, Radiology.

[9]  E. Fishman,et al.  Evaluation of CT techniques for reducing artifacts in the presence of metallic orthopedic implants. , 1988, Journal of computer assisted tomography.

[10]  Jian Dong,et al.  Successive iterative restoration applied to streak artifact reduction in X-ray CT image of dento-alveolar region , 2011, International Journal of Computer Assisted Radiology and Surgery.

[11]  E Tammisalo,et al.  Development of a compact computed tomographic apparatus for dental use. , 1999, Dento maxillo facial radiology.

[12]  L Ritter,et al.  Diagnostic quality of multiplanar reformations obtained with a newly developed cone beam device for maxillofacial imaging. , 2008, Dento maxillo facial radiology.

[13]  P. Sullivan,et al.  Cranio-orbital Reconstruction: Safety and Image Quality of Metallic Implants on CT and MRI Scanning , 1996 .

[14]  T. Okabe,et al.  Tensile strength of soldered gold alloy joints. , 1997, The Journal of prosthetic dentistry (Print).

[15]  Ralf Kurt Willy Schulze,et al.  On cone-beam computed tomography artifacts induced by titanium implants. , 2010, Clinical oral implants research.

[16]  In Sook Lee,et al.  A Pragmatic Protocol for Reduction in the Metal Artifact and Radiation Dose in Multislice Computed Tomography of the Spine: Cadaveric Evaluation after Cervical Pedicle Screw Placement , 2007, Journal of computer assisted tomography.

[17]  Mariano Alcañiz Raya,et al.  Metal artifact reduction in dental CT images using polar mathematical morphology , 2011, Comput. Methods Programs Biomed..

[18]  S Tohnak,et al.  Dental CT metal artefact reduction based on sequential substitution. , 2011, Dento maxillo facial radiology.

[19]  T. Uysal,et al.  Intermaxillary tooth size discrepancy and mesiodistal crown dimensions for a Turkish population. , 2005, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[20]  P. Herzog,et al.  Beam hardening artefacts occur in dental implant scans with the NewTom cone beam CT but not with the dental 4-row multidetector CT. , 2007, Dento maxillo facial radiology.

[21]  R. Whitehouse Computed Tomography (CT) and CT Arthrography , 2003 .

[22]  Jack Ferracane,et al.  Materials in Dentistry: Principles and Applications , 1995 .

[23]  R A Novelline,et al.  Comparison of CT Imaging Artifacts from Craniomaxillofacial Internal Fixation Devices , 1993, Plastic and reconstructive surgery.

[24]  R. Jonson Mass attenuation coefficients, quantities and units for use in bone mineral determinations , 1993, Osteoporosis International.

[25]  Christof Holberg,et al.  Cone-Beam Computed Tomography in Orthodontics: Benefits and Limitations , 2005, Journal of Orofacial Orthopedics / Fortschritte der Kieferorthopädie.

[26]  Julia F. Barrett,et al.  Artifacts in CT: recognition and avoidance. , 2004, Radiographics : a review publication of the Radiological Society of North America, Inc.

[27]  M. Janal,et al.  Biomechanical and bone histomorphologic evaluation of four surfaces on plateau root form implants: an experimental study in dogs. , 2010, Oral surgery, oral medicine, oral pathology, oral radiology, and endodontics.

[28]  P. Mozzo,et al.  A new volumetric CT machine for dental imaging based on the cone-beam technique: preliminary results , 1998, European Radiology.