Image Artifact in Dental Cone-beam CT

Overview

Journal Oral Surg Oral Med Oral Pathol Oral Radiol Endod

Publisher Elsevier

Specialties Dentistry
General Surgery

Date 2006 Apr 25

PMID 16632279

Citations 34

Authors

Akitoshi Katsumata

Akiko Hirukawa

Marcel Noujeim

Shinji Okumura

Munetaka Naitoh

Masami Fujishita

Eiichiro Ariji

Robert P Langlais

Affiliations

Soon will be listed here.

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.

Citing Articles

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