Assessment of CT numbers in limited and medium field-of-view scans taken using Accuitomo 170 and Veraviewepocs 3De cone-beam computed tomography scanners

Oliveira, Matheus Lima; Tosoni, Guilherme Monteiro; Lindsey, David H.; Mendoza, Kristopher Anthony; Tetradis, Sotirios; Mallya, Sanjay M.

doi:10.5624/isd.2014.44.4.279

Cited by 22 publications

(21 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In the present study, metallic materials in the exomass produced noticeable hypodense and hyperdense streaks (Figures 4-6), which are image artefacts resulting from beam hardening and scattering, as well as data extinction. 22,[27][28][29] For instance, mean voxel value reduced (image darkening) in the presence of any metallic material in the exomass in the CS9300 and Picasso Trio, and in the presence of two cylinders of cobalt-chromium or amalgam in the NewTom Giano. This indicates that hypodense artefacts were more predominant in the image and, in a clinical situation, could possibly affect the diagnosis of hypodense conditions, such as fracture lines.…”

Section: Discussionmentioning

confidence: 99%

Metallic materials in the exomass impair cone beam CT voxel values

Candemil

Salmon

Freitas

et al. 2018

Dentomaxillofacial Radiology

View full text Add to dashboard Cite

show abstract

Section: Discussionmentioning

confidence: 99%

Metallic materials in the exomass impair cone beam CT voxel values

Candemil

Salmon

Freitas

et al. 2018

Dentomaxillofacial Radiology

View full text Add to dashboard Cite

show abstract

“…Since such an option is not yet computable on CBCT volumes, its best to use pixel intensity values while keeping in mind that these are not absolutely defined like the Hounsfield units but never the less are practical because many studies have previously shown that Hounsfield units and pixel intensity values have a linear relationship. With careful evaluation and by using some internal controls to define the tissue thresholds, PIV values can be a very reliable way to assess bone density [ 29 ].…”

Section: Discussionmentioning

confidence: 99%

Gender and growth variation in palatal bone thickness and density for mini-implant placement

et al. 2018

View full text Add to dashboard Cite

BackgroundThe objective was to compare the palatal bone thickness (PBT) and palatal bone density (PBD) in the anterior, middle, and posterior part of the palate in males and females.MethodsThis retrospective study reviewed cone beam computed tomography scans of 359 patients. The scans were divided into 99 growing males, 105 growing females, 74 non-growing males, and 81 non-growing females. The measurements of PBT and PBD were made in between the canine and first premolar, the first premolar and second premolar, the second premolar and first molar, and the first molar and second molar. The measurements were made in the center of the palate and 4 mm away from the center. ANOVA was used to analyze the PBT and PBD in different areas between four different groups.ResultsThe PBT was lower (P < 0.0001) as we moved from the anterior to the posterior palate. The PBT was more (P < 0.001) in the center of the palate than 4 mm away from the center, except in between the canine and first premolar. The growing male and non-growing male had higher (P < 0.0001) PBT than the growing female and non-growing female in between the canine and first premolar and the first premolar and second premolar both in the center and 4 mm away from it. The PBD was higher (P < 0.05) in between the canine and first premolar area at the center of the palate and between the second premolar and first molar 4 mm away from the center in all the experimental groups.ConclusionsThere exists a definite gender and growth variation in the PBT and PBD in different parts of the palate. Palatal bone thickness between the males and females revealed that the males had significantly higher PBT than the females.

show abstract

“…18 Precision, Reproducibility, and Accuracy of Tomographic Bone Plate Level Measurements Recent studies have used higher resolution CBCT images from Accuitomo (J. Morita, Irvine, Calif) to evaluate alveolar bone and have concluded that this method of diagnosis is indicated when selecting the appropriate protocol. 19,20 Our study used the i-Cat Cone Beam 3-D Dental Imaging System (Imaging Sciences International), available at the institution where the project was developed. These results apply only to the i-Cat Cone Beam 3-D Dental Imaging System scanner; a different scanner with similar settings might give different results.…”

Section: Discussionmentioning

confidence: 99%

Precision, reproducibility, and accuracy of bone crest level measurements of CBCT cross sections using different resolutions

Menezes

Janson

Massaro

et al. 2015

The Angle Orthodontist

View full text Add to dashboard Cite

Objective: To evaluate the precision, reproducibility, and accuracy of alveolar crest level measurements on CBCT images obtained with different voxel sizes. Materials and Methods: CBCT exams were made of 12 dried human mandibles with voxel dimensions of 0.2, 0.3, and 0.4 mm. Bone crest level was measured directly on the mandibles with a digital caliper and on CBCT images. Images were measured twice by two examiners. Intra-and interexaminer precision and reproducibility were assessed using paired and t-tests, respectively. Accuracy was evaluated using t-tests. Results: Precision and reproducibility of bone crest level tomographic measurements was good for all voxel sizes evaluated. The images with 0.2-mm voxel size showed a decreased number of intraexaminer errors. A high accuracy for measurements of bone crest level was observed for all CBCT definitions, except for the mandibular incisors using the 0.4-mm voxel size. Conclusions: Precision and reproducibility of alveolar bone level measurements were good for various voxel sizes. CBCT images demonstrated good accuracy for 0.2-mm and 0.3-mm voxel sizes. The mandibular incisor region needs better resolution than that provided by 0.4-mm voxel size for bone crest level measurements. (Angle Orthod. 2016;86:535-542.)

show abstract

Assessment of CT numbers in limited and medium field-of-view scans taken using Accuitomo 170 and Veraviewepocs 3De cone-beam computed tomography scanners

Cited by 22 publications

References 17 publications

Metallic materials in the exomass impair cone beam CT voxel values

Metallic materials in the exomass impair cone beam CT voxel values

Gender and growth variation in palatal bone thickness and density for mini-implant placement

Precision, reproducibility, and accuracy of bone crest level measurements of CBCT cross sections using different resolutions

Contact Info

Product

Resources

About