Correlation of CBCT Gray Scale Values With Bone Densities

Haristoy, R.A.; Valiyaparambil, Jayasanker V.; Mallya, Sanjay M.

doi:10.1016/j.tripleo.2008.12.034

Cited by 8 publications

(8 citation statements)

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“…A strong correlation between gray scale values on CBCT images and bone densities has been found by Haristoy, et al 10 (2008). This has implications for potential quantitative radiological approaches to determine bone density from CBCT images.…”

Section: Discussionmentioning

confidence: 56%

“…Any change from true dimension of RCT may favor false interpretation on real dentin remnants, and constitute potential risks of misdiagnosis. The implication of density artifacts on diagnostic procedures seems to be obvious 28 , and different correction methods have been investigated 3 , 10 , 12 , 16 - 19 , 27 , 28 . Azevedo, et al 3 (2008) studied the effect of incident radiation energy on the amount and extent of image artifacts over adjacent anatomic structures.…”

Section: Discussionmentioning

confidence: 99%

“…This has implications for potential quantitative radiological approaches to determine bone density from CBCT images. However, given the variation of gray scale values despite normalization, it may be necessary to use calibration phantoms scanned simultaneously with the patient to ensure an accurate determination of bone density 10 . Hunter and McDavid 12 (2009) showed that additional copper filtration suppresses beam hardening artifacts.…”

Section: Discussionmentioning

confidence: 99%

“…Artifacts can cause low image quality and poor image contrast leading to limited interpretation of the 3D volumes. There is a concern with artifacts and the search for beam hardening corrections have been the focus of several studies 3 , 10 , 12 , 14 , 16 - 19 , 21 , 26 - 28 .…”

Section: Introductionmentioning

confidence: 99%

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Effect of root canal filling materials on dimensions of cone-beam computed tomography images

et al. 2012

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Objective To evaluate the discrepancy of root canal filling (RCF) measurements obtained from original root specimens and cone-beam computed tomography (CBCT) images. Material and Methods Seventy-two human maxillary anterior teeth were prepared up to an ISO #50 K-File 1 mm short of the apical foramen. Thus, the teeth were randomly divided into 8 groups, according to the root canal filling material: Sealapex®, Sealapex®+gutta-percha points, Sealer 26®, Sealer 26®+gutta-percha points, AH PlusTM, AH PlusTM+gutta-percha points, Grossman Sealer, and Grossman Sealer+gutta-percha points. After root canal preparation and RCF, CBCT scans were acquired and the specimens were sectioned in axial, sagittal and coronal planes. The RCF measurements were obtained in different planes and thicknesses to determine the discrepancy between the original root specimens (using a digital caliper) and the CBCT images (using the scanner's proprietary software). One-way analysis of variance and Tukey tests were used for statistical analyses. The significance level was set at α=5%. Results Measurements of the different endodontic filling materials were 9% to 100% greater on the CBCT images than on the original root specimens. Greater RCF dimensions were found when only sealers were used, with statistically significant difference among the groups. Conclusions RCF dimensions were greater on CBCT images than on the original root specimens, especially when only sealer was used.

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Section: Discussionmentioning

confidence: 56%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of root canal filling materials on dimensions of cone-beam computed tomography images

et al. 2012

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“…Similar results were established by Prasanna Arvind TR et al [18] According to Valiyaparambil et al a strong linear correlation was instituted between HU and grayscale levels. [25] Katsumata A et al, also established that the grayscale values attained from the CBCT imaging can be easily applied as an analogue way of HU values for the assessment of mineral density, [26] since it illustrates a linear association with the attenuation coefficients of the materials. [14,17] In contrast to these findings, Silva et al concluded that the bone density acquired via CBCT in HUs using the device was found unreliable.…”

Section: Discussionmentioning

confidence: 99%

A novel method of assessment of BMD using CBCT for implant placement: A retrospective study

Alqahtani

2023

Medicine

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Nowadays, dental implant evolves as an alternative treatment modality for oral rehabilitation. The success of dental implants is largely dependent on bone density; Cone-beam computed tomography (CBCT) is a well-known modus operandi for the volumetric measurement of bone mineral density (BMD), which measures Grayscale values on 3-D images. This study was conducted with the aim to analyze bone density with CBCT and also test its reliability and reproducibility using Galileos Sirona CBCT Viewer Software and Philips digital imaging and communications in medicine (DICOM) Viewer. A total of 75, CBCT images were obtained from the Department of Oral Radiology, retrospectively, and, BMD in Hounsfield units (HUs) was evaluated in a standardized implant area superimposed on the images. Bone density was also calculated by 2 different independent observers. The estimation of sample size was achieved to attain a power of 90% with 0.5 alpha error and 0.2 effect size as per a previous study. Statistical analysis was performed by statistical package for the social sciences version 22.0; data were presented as mean and standard deviation and Kappa correlation test was applied to check the reproducibility of values. The mean and standard deviation of grayscale values and HUs attained from the interdental area of front teeth were 1837 (288.76) and 270 (125.4), respectively, with a conversion factor of 6.8. Whereas the mean and standard deviation of grayscale values and HUs acquired from posterior interdental spaces were 2880 (489.99) and 640 (204.6), respectively, with a conversion factor of 4.5. To verify the reproducibility Kappa correlation test was applied, which showed correlation values of 0.68 and 0.79. The conversion or exchange factors for grayscale values to HUs determined at the frontal, posterior interdental space area and from the highly radio-opaque area were exceedingly reproducible and consistent. Hence, CBCT can be used as one of the valuable techniques in the estimation of bone density.

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Evaluation of Cone-beam Computed Tomography Artifacts Produced by Metal Objects Located Within and Outside the Field of View

Kassabji¹,

Tahmasbi²,

Augsburger³

et al. 2022

Journal of Endodontics

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Correlation of CBCT Gray Scale Values With Bone Densities

Cited by 8 publications

References 0 publications

Effect of root canal filling materials on dimensions of cone-beam computed tomography images

Effect of root canal filling materials on dimensions of cone-beam computed tomography images

A novel method of assessment of BMD using CBCT for implant placement: A retrospective study

Evaluation of Cone-beam Computed Tomography Artifacts Produced by Metal Objects Located Within and Outside the Field of View

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