scholarly journals Incidental Findings on Cone Beam Computed Tomography Images

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Veeratrishul Allareddy ◽  
Steven D. Vincent ◽  
John W. Hellstein ◽  
Fang Qian ◽  
Wendy R. K. Smoker ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Incidental Findings ◽  
Regions Of Interest ◽  
Cone Beam ◽  
Anatomical Structures ◽  
Area Of Interest ◽  
Computed Tomography Images ◽  
Computed Tomography Scans ◽  
Areas Of Interest

Background. Cone beam computed tomography (CBCT) has gained widespread acceptance in dentistry for a variety of applications. Most dentists who are not radiologists/trained in radiology are generally not familiar with interpretation of anatomical structures and/or pathosis outside their area of primary interest, as often this was not within the scope of their training.Objectives. To assess that the number of incidental findings on a CBCT scan is high both within and outside of the primary area of interest, thereby emphasizing the importance of interpretation of all areas visualized on the scan.Materials and Methods. An oral and maxillofacial radiologist reviewed 1000 CBCT scans (382 males and 618 females) for findings both in- and outside the area of interest.Results. Of the 1000 subjects that were reviewed, 943 scans showed findings in the primary regions of interest and/or outside the regions of interest, and 76 different conditions were visualized in these scans both in and outside the areas of interest.Conclusion. From the wide scope of findings noted on these scans, it can be concluded that it is essential that a person trained in advanced interpretation techniques in radiology interprets cone beam computed tomography scans.

scholarly journals Oral and maxillofacial anatomical structures acknowledgment through cone beam computed tomography images – a teaching practice experience

2019 ◽  
Vol 19 (3) ◽  
pp. 163-171
Author(s):  
Solange Kobayashi-Velasco ◽  
Fernanda Cristina Sales Salineiro ◽  
Ivan Onone Gialain ◽  
Wellington Hideaki Yanaguizawa ◽  
Marcelo Gusmão Paraiso Cavalcanti
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Teaching Practice ◽  
Cone Beam ◽  
Anatomical Structures ◽  
Practice Experience ◽  
Computed Tomography Images

O objetivo deste estudo foi relatar uma metodologia de ensino de tomografia computadorizada de feixe cônico (TCFC) aplicada a estudantes de graduação, avaliando o conhecimento de estruturas anatômicas do complexo dentomaxilofacial. Os estudantes foram orientados quanto às estruturas anatômicas e às aplicações clínicas da TCFC em aulas teóricas e práticas, compreendendo 45 horas de aula. Foram submetidos a duas avaliações, a primeira na metade do semestre, e a segunda no término do semestre. Os escores das avaliações (três variáveis: 1) nome, 2) lado - esquerdo/direito e 3) reconstruções multiplanares (RMP) - imagens ortogonais de identificação) foram comparados para verificar se houve melhora na aprendizagem. Testes de medianas e Wilcoxon compararam os exames intermediário e final. Os valores medianos para a variável 1 foram 6,0 (intermediário) e 8,0 (final). Em relação à variável 2, a mediana variou de 9,0 (intermediário) a 10,0 (final). Quando os resultados da variável 3 foram analisados, ambas as medianas foram 10,0. Houve diferença significativa (teste de Wilcoxon, p<0,05) quando foram comparados os exames intermediário e final, nas três categorias. Correlações lineares foram estabelecidas entre as três categorias e foram estatisticamente significantes para duas associações (“nome da estrutura anatômica” com “lado da estrutura anatômica” e “nome da estrutura anatômica” com “imagens da MPR”). Os estudantes de graduação apresentaram uma melhora em termos do reconhecimento correto das estruturas anatômicas, nome e lado, bem como imagens de MPR quando comparadas as duas avaliações.

scholarly journals Metal Artifact Reduction in Cone-Beam Computed Tomography for Head and Neck Radiotherapy

2016 ◽  
Vol 15 (6) ◽  
pp. NP88-NP94 ◽  
Author(s):  
Mark Korpics ◽  
Paul Johnson ◽  
Rakesh Patel ◽  
Murat Surucu ◽  
Mehee Choi ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Head And Neck ◽  
Cone Beam Computed Tomography ◽  
Regions Of Interest ◽  
Cone Beam ◽  
Artifact Reduction ◽  
Metal Artifacts ◽  
Dental Fillings ◽  
Computed Tomography Images ◽  
Streak Artifacts

Purpose: To evaluate a method for reducing metal artifacts, arising from dental fillings, on cone-beam computed tomography images. Materials and Methods: A projection interpolation algorithm is applied to cone-beam computed tomography images containing metal artifacts from dental fillings. This technique involves identifying metal regions in individual cone-beam computed tomography projections and interpolating the surrounding values to remove the metal from the projection data. Axial cone-beam computed tomography images are then reconstructed, resulting in a reduction in the streak artifacts produced by the metal. Both phantom and patient imaging data are used to evaluate this technique. Results: The interpolation substitution technique successfully reduced metal artifacts in all cases. Corrected images had fewer or no streak artifacts compared to their noncorrected counterparts. Quantitatively, regions of interest containing the artifacts showed reduced variance in the corrected images versus the uncorrected images. Average pixel values in regions of interest around the metal object were also closer in value to nonmetal regions after artifact reduction. Artifact correction tended to perform better on patient images with less complex metal objects versus those with multiple large dental fillings. Conclusion: The interpolation substitution is potentially an efficient and effective technique for reducing metal artifacts caused by dental fillings on cone-beam computed tomography image. This technique may be effective in reducing such artifacts in patients with head and neck cancer receiving daily image-guided radiotherapy.

scholarly journals Characteristics and Prevalence of Anterior Buccal Mandibular Depression Area in Cone Beam Computed Tomography Images

2021 ◽  
Vol 25 (3) ◽  
pp. 170-177
Author(s):  
Taha Emre Köse ◽  
Onur Dinçer Köse ◽  
Gülay Altan Şallı
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Maximum Depth ◽  
Cone Beam ◽  
Maximum Width ◽  
Cross Sectional ◽  
Area Of Interest ◽  
Computed Tomography Images ◽  
Alveolar Crest ◽  
Significant Difference

Summary Background/Aim: The purpose of this study was to assess the anterior buccal mandibular depressions (ABMD) prevalence and clinical characteristics at cone beam computed tomography images (CBCT). Material and Methods: 198 CBCT images with minimal depression between the mandibular molars were evaluated retrospectively. Presence and location of ABMD, its maximum depth, maximum width, cortical width, if any, alveolar crest width at maximum depth, the distance between maximum depth and alveolar crest apex and existing teeth in the relevant region were examined in cross-sectional views. Panoramic radiography of ABMD patients was evaluated for trabecular pattern and radiopacity to determine the area of interest. The possible lingual depression area on the maximum depth of ABMD slice was investigated and the same measurements for ABMD was performed. The presence of aperture / foramen in the ABMD area was also investigated. Results: The prevalence of ABMD was found as 43.43% where 82 cases were at bilateral side and 4 cases were only at left side. Lingual depression was observed in 20.7% right side and 30.2% left side of the ABMD cases. There was no statistically significant difference for maximum depth between different age groups. Most frequent location was observed in lateral and canine region (27.4%) followed by lateral-first premolar area (25.6%). Least frequent location was at canine-second premolar area (1.2%). Conclusions: ABMD is a lesser known area with a high prevalence observed on CBCT images. The detectability of the area on panoramic radiographs is limited. Clinicians should take into consideration ABMDs’ characteristics to avoid confusion with periapical pathologies. Failure to detect these areas before implant surgeries may cause complications. For this reason, it is important to be examined in detail for ABMD before surgery.

Incidental findings on cone beam computed tomography scans in cleft lip and palate patients

2013 ◽  
Vol 18 (4) ◽  
pp. 1237-1244 ◽  
Author(s):  
Mette A. R. Kuijpers ◽  
Andrzej Pazera ◽  
Ronald J. Admiraal ◽  
Stefaan J. Bergé ◽  
Arjan Vissink ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Incidental Findings ◽  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Cone Beam ◽  
Computed Tomography Scans

Incidental Findings in Small Field of View Cone-beam Computed Tomography Scans

2017 ◽  
Vol 43 (6) ◽  
pp. 901-904 ◽  
Author(s):  
David G. Oser ◽  
Brett R. Henson ◽  
Elaine Y. Shiang ◽  
Matthew D. Finkelman ◽  
Robert B. Amato
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Incidental Findings ◽  
Field Of View ◽  
Cone Beam ◽  
Small Field ◽  
Computed Tomography Scans ◽  
Small Field Of View
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