Journal ArticleDOI
Image artifact in dental cone-beam CT
Akitoshi Katsumata,Akiko Hirukawa,Marcel E Noujeim,Shinji Okumura,Munetaka Naitoh,Masami Fujishita,Eiichiro Ariji,Robert P. Langlais +7 more
TLDR
The probability that this artifact seen in limited-volume cone-beam CT imaging is caused by halation from the image intensifier (II) system is suggested.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.read more
Citations
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Journal ArticleDOI
Cone-beam computerized tomography (CBCT) imaging of the oral and maxillofacial region: a systematic review of the literature.
TL;DR: There is a lack of evidence-based data on the radiation dose for CBCT imaging, and an attempt was made to provide a minimal set of CBCT device-related parameters for dedicated OMF scanners as a guideline for future studies.
Journal ArticleDOI
Artefacts in CBCT: a review
Ralf Schulze,Ulrich Heil,D Groβ,D. D. Bruellmann,Egor Dranischnikow,Ulrich Schwanecke,Elmar Schoemer +6 more
TL;DR: The most prominent artefacts identified in the scientific literature are discussed and the existing knowledge on these artefacts is reviewed to discuss the basic three-dimensional reconstruction concept applied by today's CBCT scanners.
Journal ArticleDOI
Use of Cone Beam Computed Tomography in Endodontics
TL;DR: A literature review and pictorial demonstration of CBCT as an imaging adjunct for endodontics is provided and small field of view images at low dose with sufficient spatial resolution are provided.
Journal ArticleDOI
Deriving Hounsfield units using grey levels in cone beam computed tomography
TL;DR: HU can be derived from the grey levels in dental CBCT scanners using linear attenuation coefficients as an intermediate step.
Journal ArticleDOI
AAE and AAOMR Joint Position Statement: Use of Cone Beam Computed Tomography in Endodontics 2015 Update
Mohamed I. Fayad,Madhu K. Nair,Martin D. Levin,Erika Benavides,Richard A. Rubinstein,S. Barghan,Craig S. Hirschberg,Axel Ruprecht +7 more
TL;DR: The following statement was prepared by the Special Committee to Revise the Joint American Association of Endodontists/American Academy of Oral and Maxillofacial Radiology Position on Cone Beam Computed Tomography and approved by the AAE Board of Directors and AAOMR Executive Council in May 2015.
References
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Journal ArticleDOI
Development of a compact computed tomographic apparatus for dental use.
TL;DR: Ortho-CT as mentioned in this paper is a cone-beam-type of CT apparatus consisting of a multifunctional maxillofacial imaging machine (Scanora, Soredex, Helsinki, Finland) in which the film is replaced with an X-ray imaging intensifier (Hamamatsu Photonics, Hamamatsu, Japan).
Journal Article
Accuracy in measurement of distance using limited cone-beam computerized tomography.
TL;DR: LCBCT was shown to be a useful tool for preoperative evaluation in dental surgery because the relatively small field size of its images limits the patient's exposure to radiation.
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A comparison of a new limited cone beam computed tomography machine for dental use with a multidetector row helical CT machine.
TL;DR: The results clearly indicate the superiority of the 3DX in the display of hard tissues in the dental area while substantially decreasing the dose to the patient.
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Characteristics of a newly developed dentomaxillofacial X-ray cone beam CT scanner (CB MercuRay™): system configuration and physical properties
TL;DR: This study shows that the newly developed cone beam CT system produces high resolution three-dimensional volumetric images that will be useful for the examination of dentomaxillofacial disorders.
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Diagnostic imaging with newly developed ortho cubic super-high resolution computed tomography (Ortho-CT).
TL;DR: Because Ortho-CT can take high-resolution 3-dimensional images at any tomographic layer with only 1 exposure, it is useful for the diagnosis of diseases in the oral and maxillofacial region.