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Review
. 2015 Nov-Dec;5(6):440-5.
doi: 10.4103/2231-0762.170523.

Artifacts: The downturn of CBCT image

Anil Kumar Nagarajappa  1 , Neha Dwivedi  1 , Rana Tiwari  2
Affiliations
Review

Artifacts: The downturn of CBCT image

Anil Kumar Nagarajappa et al. J Int Soc Prev Community Dent. 2015 Nov-Dec.

Abstract

Cone-beam computed tomography (CBCT) has been accepted as a useful tool for diagnosis and treatment planning in dentistry. Despite a growing trend of CBCT in dentistry, it has some disadvantages like artifacts. Artifacts are discrepancies between the reconstructed visual image and the actual content of the subject which degrade the quality of CBCT images, making them diagnostically unusable. Additionally, structures that do not exist in the subject may appear within images. Such structures can occur because of patient motion, the image capture and reconstruction process. To optimize image quality, it is necessary to understand the types of artifacts. This article aims to throw light on the various types of artifacts associated with CBCT images.

Keywords: Aliasing artifacts; beam hardening; motion artifacts; scanner-related artifacts; stair step artifacts; zebra artifacts.

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Figures

Figure 1
Figure 1
Classification of artifacts
Figure 2
Figure 2
Beam hardening artifact adjacent to a silver point and metal artifact streaks from the metal coping
Figure 3
Figure 3
Blurring and double cortices caused by motion artifact
Figure 4
Figure 4
Ring artifact caused by calibration error
Figure 5
Figure 5
Noise
Figure 6
Figure 6
Aliasing pattern artifact
See this image and copyright information in PMC

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