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Image artifact in dental cone-beam CT.

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

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ArtifactsHumansPhantoms, ImagingRadiography, DentalTomography, Spiral ComputedX-Ray Intensifying ScreensJournal Article

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Akitoshi Katsumata, Akiko Hirukawa, Marcel Noujeim, Shinji Okumura, Munetaka Naitoh, Masami Fujishita, Eiichiro Ariji, Robert P Langlais. 2005-11-11. Image artifact in dental cone-beam CT.. https://doi.org/10.1016/j.tripleo.2005.07.027

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