Metal artefact reduction with cone beam CT: An in vitro study

Boulos Bechara, William Moore, C. A. McMahan, Marcel E Noujeim

Research output: Contribution to journalArticle

62 Citations (Scopus)

Abstract

Background: Metal in a patient's mouth has been shown to cause artefacts that can interfere with the diagnostic quality of cone beam CT. Recently, a manufacturer has made an algorithm and software available which reduces metal streak artefact (Picasso Master 3D ® machine; Vatech, Hwaseong, Republic of Korea). Objectives: The purpose of this investigation was to determine whether or not the metal artefact reduction algorithm was effective and enhanced the contrast-to-noise ratio. Methods: A phantom was constructed incorporating three metallic beads and three epoxy resin-based bone substitutes to simulate bone next to metal. The phantom was placed in the centre of the field of view and at the periphery. 10 data sets were acquired at 50-90 kVp. The images obtained were analysed using a public domain software ImageJ (NIH Image, Bethesda, MD). Profile lines were used to evaluate grey level changes and area histograms were used to evaluate contrast. The contrast-to-noise ratio was calculated. Results: The metal artefact reduction option reduced grey value variation and increased the contrast-to-noise ratio. The grey value varied least when the phantom was in the middle of the volume and the metal artefact reduction was activated. The image quality improved as the peak kilovoltage increased. Conclusion: Better images of a phantom were obtained when the metal artefact reduction algorithm was used.

Original languageEnglish (US)
Pages (from-to)248-253
Number of pages6
JournalDentomaxillofacial Radiology
Volume41
Issue number3
DOIs
StatePublished - Mar 1 2012

Fingerprint

Cone-Beam Computed Tomography
Artifacts
Metals
Noise
Software
Epoxy Resins
Bone Substitutes
Republic of Korea
Public Sector
In Vitro Techniques
Mouth
Bone and Bones

Keywords

  • Artefact
  • Cone beam computed tomography
  • Noise

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Otorhinolaryngology
  • Dentistry(all)

Cite this

Bechara, B., Moore, W., McMahan, C. A., & Noujeim, M. E. (2012). Metal artefact reduction with cone beam CT: An in vitro study. Dentomaxillofacial Radiology, 41(3), 248-253. https://doi.org/10.1259/dmfr/80899839

Metal artefact reduction with cone beam CT : An in vitro study. / Bechara, Boulos; Moore, William; McMahan, C. A.; Noujeim, Marcel E.

In: Dentomaxillofacial Radiology, Vol. 41, No. 3, 01.03.2012, p. 248-253.

Research output: Contribution to journalArticle

Bechara, B, Moore, W, McMahan, CA & Noujeim, ME 2012, 'Metal artefact reduction with cone beam CT: An in vitro study', Dentomaxillofacial Radiology, vol. 41, no. 3, pp. 248-253. https://doi.org/10.1259/dmfr/80899839
Bechara, Boulos ; Moore, William ; McMahan, C. A. ; Noujeim, Marcel E. / Metal artefact reduction with cone beam CT : An in vitro study. In: Dentomaxillofacial Radiology. 2012 ; Vol. 41, No. 3. pp. 248-253.
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