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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.


Ring artifact caused by calibration error
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Figure 4: Ring artifact caused by calibration error

Mentions: Visible as concentric rings [Figure 4] centered around the location of the axis of rotation that result from imperfections in scanner detection or poor calibration. They are most prominent when homogeneous media are imaged. Owing to the circular trajectory and the discrete sampling process, these inconsistencies appear as rings in the planes coplanar with the movement plane of the source (axial planes in CBCT).[21011122022]


Artifacts: The downturn of CBCT image.

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

Ring artifact caused by calibration error
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 4: Ring artifact caused by calibration error
Mentions: Visible as concentric rings [Figure 4] centered around the location of the axis of rotation that result from imperfections in scanner detection or poor calibration. They are most prominent when homogeneous media are imaged. Owing to the circular trajectory and the discrete sampling process, these inconsistencies appear as rings in the planes coplanar with the movement plane of the source (axial planes in CBCT).[21011122022]

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.