Image artifact in dental cone-beam CT

Akitoshi Katsumata, Akiko Hirukawa, Marcel Noujeim, Shinji Okumura, Munetaka Naitoh, Masami Fujishita, Eiichiro Ariji, Robert P. Langlais

Research output: Contribution to journalArticlepeer-review

95 Scopus citations

Abstract

Purpose: The purpose of this study was to investigate the appearance and possible cause of an artifact seen in limited-volume cone-beam CT imaging. Methods: A water-filled plastic cylinder was used as a phantom of the head. A test object was constructed as a bone-equivalent phantom to be imaged. The test object was variously positioned at the center of the phantom and near its margins. CT images of the test object were acquired using a 3DX Accuitomo system. Results: In slice images with the test object positioned near the margin of the phantom, arch-shaped defects or deformities were observed on the side of the object. There was a negative correlation between the artifact and the CT value of the object. The artifact was larger in images scanned with a higher voltage. Conclusion: The probability that this artifact is caused by halation from the image intensifier (II) system is suggested.

Original languageEnglish (US)
Pages (from-to)652-657
Number of pages6
JournalOral Surgery, Oral Medicine, Oral Pathology, Oral Radiology and Endodontology
Volume101
Issue number5
DOIs
StatePublished - May 1 2006

ASJC Scopus subject areas

  • Surgery
  • Oral Surgery
  • Otorhinolaryngology
  • Dentistry(all)

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