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Artifacts: The downturn of CBCT image.

Nagarajappa AK, Dwivedi N, Tiwari R - J Int Soc Prev Community Dent (2015 Nov-Dec)

Bottom Line: Additionally, structures that do not exist in the subject may appear within images.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.

View Article: PubMed Central - PubMed

Affiliation: Department of Oral Medicine and Radiology, Hitkarini Dental College and Hospital, Jabalpur, Madhya Pradesh, India.

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.

No MeSH data available.


Classification of artifacts
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Figure 1: Classification of artifacts

Mentions: However, there are some drawbacks in using CBCT as an imaging technique. The presence of gray-level non-uniformities in CBCT contributes to artifact formation in reconstructed CBCT images. In CT, the term “artifact” refers to any systematic discrepancy between the CT numbers in the reconstructed image and the true attenuation coefficients of the object.[1] Artifacts are commonly encountered in clinical CT, and may obscure or simulate pathology. There are many different types of CT artifacts [Figure 1], including noise, beam hardening, scatter, pseudoenhancement, motion, cone beam, helical, ring, and metal artifacts.[2]


Artifacts: The downturn of CBCT image.

Nagarajappa AK, Dwivedi N, Tiwari R - J Int Soc Prev Community Dent (2015 Nov-Dec)

Classification of artifacts
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4697226&req=5

Figure 1: Classification of artifacts
Mentions: However, there are some drawbacks in using CBCT as an imaging technique. The presence of gray-level non-uniformities in CBCT contributes to artifact formation in reconstructed CBCT images. In CT, the term “artifact” refers to any systematic discrepancy between the CT numbers in the reconstructed image and the true attenuation coefficients of the object.[1] Artifacts are commonly encountered in clinical CT, and may obscure or simulate pathology. There are many different types of CT artifacts [Figure 1], including noise, beam hardening, scatter, pseudoenhancement, motion, cone beam, helical, ring, and metal artifacts.[2]

Bottom Line: Additionally, structures that do not exist in the subject may appear within images.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.

View Article: PubMed Central - PubMed

Affiliation: Department of Oral Medicine and Radiology, Hitkarini Dental College and Hospital, Jabalpur, Madhya Pradesh, India.

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.

No MeSH data available.