scholarly journals Identification of dental root canals and their medial line from micro-CT and cone-beam CT records

2012 ◽  
Vol 11 (1) ◽  
pp. 81 ◽  
Author(s):  
Balázs Benyó
Keyword(s):  
Cone Beam Ct ◽  
Cone Beam ◽  
Micro Ct ◽  
Root Canals

DEVELOPMENT AND EVALUATION OF RECONSTRUCTION METHODS FOR AN IN-HOUSE DESIGNED CONE-BEAM MICRO-CT IMAGING SYSTEM

2006 ◽  
Vol 18 (05) ◽  
pp. 270-275 ◽  
Author(s):  
HSIAO-MEI FU ◽  
HO-SHIANG CHUEH ◽  
WEN-KAI TSAI ◽  
JYH-CHENG CHEN
Keyword(s):  
Imaging System ◽  
Cone Beam Ct ◽  
Ct Imaging ◽  
Bone Sample ◽  
Cone Beam ◽  
Human Tooth ◽  
Micro Ct ◽  
Reconstruction Methods ◽  
Pixel Value ◽  
Tooth Sample

Purpose: Cone-beam micro computed tomography CT (micro-CT) can offer comprehensive 3D information and high-resolution images. This technology can be used with other imaging modalities in the preclinical application of molecular imaging research. Image reconstruction algorithm affects final image spatial resolution, which is the primary topic of this study. We use two types of reconstruction methods, which are analytical (tent-FDK) and statistical iterative (convex algorithm) algorithms, to reconstruct the micro-CT images for evaluation. Materials and Methods: In this study, projection data of the Defrise phantom and HA (Hydroxy-Apatite) phantom were obtained using an in-house designed micro-CT imaging system and images were reconstructed with the tent-FDK and convex algorithms. We develop a new way to calculate the system matrix of our micro-CT. Human tooth sample and mouse bone sample data were reconstructed with the analytic and iterative algorithms. Results: The Defrise phantom results show coronal view of the images reconstructed by the tent-FDK and convex algorithms. From the profile of the results, image reconstructed by the convex algorithm has higher pixel value in the high-density layer. Comparison of the results of human tooth sample and mouse bone sample reconstructed by the two kinds of algorithms, the image reconstructed by the convex algorithm has fewer artifacts and more correct pixel value representing for the attenuation coefficients. Conclusion: Tent-FDK algorithm is a kind of useful analytic method to reconstruct cone-beam CT data. We also develop the convex iterative method to reconstruct images for low dose X-ray cone-beam CT, which performs better than the analytical one in general.

scholarly journals A comparative evaluation of cone beam CT and micro-CT on trabecular bone structures in the human mandible

2013 ◽  
Vol 42 (8) ◽  
pp. 20130145 ◽  
Author(s):  
J Van Dessel ◽  
Y Huang ◽  
M Depypere ◽  
I Rubira-Bullen ◽  
F Maes ◽  
...  
Keyword(s):  
Trabecular Bone ◽  
Comparative Evaluation ◽  
Cone Beam Ct ◽  
Cone Beam ◽  
Micro Ct ◽  
Bone Structures

scholarly journals Computerized Tomography Technique for the Investigation of the Maxillary First Molar Mesiobuccal Root

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Stefano Corbella ◽  
Massimo Del Fabbro ◽  
Igor Tsesis ◽  
Silvio Taschieri
Keyword(s):  
Computerized Tomography ◽  
Cone Beam Ct ◽  
Root Anatomy ◽  
Cone Beam ◽  
Micro Ct ◽  
Common Root ◽  
Electronic Search ◽  
Weighted Means ◽  
Root Canal Morphology ◽  
Second Mesiobuccal Canal

The aim of this paper was to review the literature about the use of computerized tomography to evaluate the presence and characteristics of the second mesiobuccal canal in the maxillary first molar. An electronic search was performed. Frequencies of the presence of second mesiobuccal canal and root anatomy characteristics were extracted from the selected studies. Pooled frequencies were calculated as weighted means. Seven articles were included. A second mesiobuccal canal was present in 59.32% of the teeth, and it was noncommunicating in 58.45% of teeth presenting the canal itself. The most common root canal morphology was single canal or two separated canals. The present paper showed that cone beam CT is a viable radiologic device for the evaluation of the mesiobuccal root of maxillary first molars. In fact, it was observed that the frequency of second mesiobuccal canal detection is similar to those presented by clinical studies or micro-CT evaluations.

The assessment of trabecular bone parameters and cortical bone strength: A comparison of micro-CT and dental cone-beam CT

2013 ◽  
Vol 46 (15) ◽  
pp. 2611-2618 ◽  
Author(s):  
Jui-Ting Hsu ◽  
Shun-Ping Wang ◽  
Heng-Li Huang ◽  
Ying-Ju Chen ◽  
Jay Wu ◽  
...  
Keyword(s):  
Trabecular Bone ◽  
Cortical Bone ◽  
Bone Strength ◽  
Cone Beam Ct ◽  
Cone Beam ◽  
Micro Ct ◽  
Bone Parameters

scholarly journals ­­­­­Comparison of Anterior and Posterior Trabecular Bone Microstructure of Human Mandible Using Cone-Beam CT and Micro CT

2020 ◽  
Author(s):  
Norliza Ibrahim ◽  
Azin Parsa ◽  
Bassam Hassan ◽  
Paul der Stelt ◽  
Siti Mazlipah Ismail ◽  
...  
Keyword(s):  
Trabecular Bone ◽  
Structural Parameters ◽  
Cone Beam Ct ◽  
Bone Microstructure ◽  
Imaging Systems ◽  
Cone Beam ◽  
Micro Ct ◽  
Trabecular Thickness ◽  
Trabecular Bone Microstructure ◽  
Trabecular Number

Abstract Objective The aim of this study was to compare the trabecular bone microstructures of anterior and posterior edentulous regions of human mandible using cone-beam CT (CBCT) and micro CT (µCT).Materials and methods Twenty volumes of interests consisting of six anterior and fourteen posterior edentulous regions were obtained from human mandibular cadavers. A CBCT system with a resolution of 80 µm (3D Accuitomo 170, J. Morita, Kyoto, Japan) and a µCT system with a resolution of 35 µm (SkyScan 1173, Kontich, Belgium) were used to scan the mandibles. Three structural parameters namely, trabecular number (Tb.N), trabecular thickness (Tb.Th), and trabecular separation (Tb.Sp) were analysed using CTAn software (v 1.11, SkyScan, Kontich, Belgium). For each system, the measurements obtained from anterior and posterior regions were tested using independent sample t-test. Subsequently, all measurements between systems were tested using paired t-test.Results In CBCT, all parameters of the anterior and posterior mandible showed no significant differences (p > 0.05). However, µCT showed a significant different of Tb.Th (p = 0.023) between anterior and posterior region. Regardless of regions, the measurements obtained using both imaging systems were significantly different (p ≤ 0.021) for Tb.Th and Tb.N.Conclusions The current study demonstrated that only the variation of Tb.Th between anterior and posterior edentulous region of mandible can be detected using micro CT. In addition, CBCT is less feasible than micro CT in assessing trabecular bone microstructures at both regions.

Comparison of linear and volumetric measurements obtained from periodontal defects by using cone beam-CT and micro-CT: an in vitro study

2018 ◽  
Vol 23 (5) ◽  
pp. 2235-2244 ◽  
Author(s):  
M. Ayşe Tayman ◽  
Kıvanç Kamburoğlu ◽  
Özlem Küçük ◽  
Funda S. Ö. Ateş ◽  
Meral Günhan
Keyword(s):  
Cone Beam Ct ◽  
In Vitro Study ◽  
Vitro Study ◽  
Cone Beam ◽  
Micro Ct ◽  
Volumetric Measurements

Tooth and root size as determined from 0.25- and 0.30-mm voxel size cone-beam CT imaging when contrasted to micro-CT scans (0.06 mm): An ex vivo study

2021 ◽  
pp. 146531252110661
Author(s):  
Gaston F Coutsiers Morell ◽  
Yuli Berlin-Broner ◽  
Carlos Flores-Mir ◽  
Giseon Heo
Keyword(s):  
Repeated Measures ◽  
Root Resorption ◽  
Ex Vivo ◽  
Imaging Modality ◽  
Cone Beam Ct ◽  
Three Dimensional ◽  
Cone Beam ◽  
Micro Ct ◽  
Voxel Size ◽  
Ex Vivo Study

Objective: To quantify tooth volume differences from extracted teeth when using three different three-dimensional (3D) computed tomography (CT)-based imaging modalities. Design: Ex vivo study. Setting: Laboratory and clinics of the University of Alberta. Methods: Cone-beam CT (CBCT) of 12 extracted teeth were scanned using 0.25- and 0.30-mm voxel size from CBCT and a 0.06-mm voxel size from micro-CT (reference standard). 3D reconstructions for each tooth from each imaging modality were made through the software ITK-SNAP®. The mean volume differences between each pair of scanning modalities were calculated and then compared and analysed through a repeated measures ANOVA. Results: The average overestimations of the teeth volume were 15.2% for the high-resolution CBCT and 28.1% for the low-resolution CBCT compared to micro-CT measurements. The differences in absolute volume were 81.6 mm3 and 152.8 mm3, respectively. All differences were statistically significant ( P < 0.05). Conclusions: Orthodontists and researchers who assess root resorption through CBCT imaging should be aware that the depicted volumes may likely be overestimating tooth volume and camouflaging real root volumetric treatment changes.

Bone quality evaluation at dental implant site using multislice CT, micro-CT, and cone beam CT

2013 ◽  
Vol 26 (1) ◽  
pp. e1-e7 ◽  
Author(s):  
Azin Parsa ◽  
Norliza Ibrahim ◽  
Bassam Hassan ◽  
Paul van der Stelt ◽  
Daniel Wismeijer
Keyword(s):  
Dental Implant ◽  
Bone Quality ◽  
Quality Evaluation ◽  
Cone Beam Ct ◽  
Multislice Ct ◽  
Cone Beam ◽  
Micro Ct

scholarly journals An Image Quality Comparison Study Between Homemade and Commercial Dental Cone-beam CT Systems

2021 ◽  
Author(s):  
Trang Thi Ngoc Tran ◽  
David Shih-Chun Jin ◽  
Kun-Long Shih ◽  
Ming-Lun Hsu ◽  
Jyh-Cheng Chen
Keyword(s):  
Image Quality ◽  
Spatial Resolution ◽  
Cone Beam Ct ◽  
Calcium Hydroxyapatite ◽  
Cone Beam ◽  
Micro Ct ◽  
Mineral Density ◽  
Image Intensity ◽  
System A ◽  
Noise Ratio

Abstract Purpose: Cone-beam computed tomography (CBCT) has been widely applied in dental and maxillofacial imaging. Several dental CBCT systems have been recently developed in order to improve the performance. This study aimed to evaluate the image quality of our prototype (YMU-DENT-P001) and compare with another commercial CBCT system made in Taipei, Taiwan (system A). Methods: The Micro-CT-Contrast Scale, Micro-CT Water and Micro-CT HA phantoms were utilized to evaluate the contrast to noise ratio (CNR), signal to noise ratio (SNR), uniformity, distortion, and the linear relation between image intensity and calcium hydroxyapatite concentrations. Another customized thin-wire phantom was used to evaluate the FWHM spatial resolution. These phantoms were scanned by the two CBCT systems using the same exposure protocol. Acquired data were evaluated using the image analysis platform designed by our lab, which followed ISO standard. Results: The SNR of our prototype YMU-DENT-P001 is nearly five times higher (prototype: 159.85 ± 3.88; A: 35.42 ± 0.61; p<0.05) while CNR is three times higher than system A (prototype: 329.39 ± 5.55; A: 100.29 ± 2.31; p < 0.05). The spatial resolutions recorded are 0.2446 mm in the prototype DENT and 0.5179 mm in the commercial system A. Image produced by the prototype is also better in terms of distortion level (0.03 mm in prototype, compared to 0.294 mm in A, p < 0.05). The linear relationship between bone mineral density (BMD) and image intensity of both systems were similarly performed.Conclusion: Within the limitation of this study, our prototype DENT-P001 has potential to produce better image quality than system A in terms of spatial resolution, SNR, CNR, uniformity, and distortion.

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