Planar cone-beam computed tomography for high-resolution industrial application

2009 ◽  
Author(s):  
Tong Liu
Keyword(s):  
Computed Tomography ◽  
High Resolution ◽  
Cone Beam Computed Tomography ◽  
Industrial Application ◽  
Cone Beam

Accuracy of High-resolution Small-volume Cone-beam Computed Tomography in Detecting Complex Anatomy of the Apical Isthmi: Ex Vivo Analysis

2018 ◽  
Vol 44 (12) ◽  
pp. 1862-1866 ◽  
Author(s):  
Elen de Souza Tolentino ◽  
Pablo Andrés Amoroso-Silva ◽  
Murilo Priori Alcalde ◽  
Heitor Marques Honório ◽  
Lilian Cristina Vessoni Iwaki ◽  
...  
Keyword(s):  
Computed Tomography ◽  
High Resolution ◽  
Cone Beam Computed Tomography ◽  
Small Volume ◽  
Ex Vivo ◽  
Cone Beam ◽  
Complex Anatomy

Width of the normal facial canal measured by high-resolution cone-beam computed tomography

2013 ◽  
Vol 133 (11) ◽  
pp. 1227-1232 ◽  
Author(s):  
Masahiro Komori ◽  
Kazuomi Yamada ◽  
Yasuyuki Hinohira ◽  
Hiroshi Aritomo ◽  
Naoaki Yanagihara
Keyword(s):  
Computed Tomography ◽  
High Resolution ◽  
Cone Beam Computed Tomography ◽  
Cone Beam ◽  
Facial Canal

Accuracy of High-resolution Small-volume Cone-Beam Computed Tomography in the Diagnosis of Vertical Root Fracture: An In Vivo Analysis

2020 ◽  
Vol 46 (8) ◽  
pp. 1059-1066 ◽  
Author(s):  
Debora R. Dias ◽  
Lilian C.V. Iwaki ◽  
Alexandre C.A. de Oliveira ◽  
Felipe S. Martinhão ◽  
Robson M. Rossi ◽  
...  
Keyword(s):  
Computed Tomography ◽  
High Resolution ◽  
Cone Beam Computed Tomography ◽  
Small Volume ◽  
Cone Beam ◽  
Root Fracture ◽  
Vertical Root Fracture ◽  
In Vivo Analysis

High-resolution cone-beam computed tomography for assessment of bone invasion in oral cancer: Comparison with conventional computed tomography

Head & Neck ◽  
2017 ◽  
Vol 39 (10) ◽  
pp. 2016-2020 ◽  
Author(s):  
Lukasz Czerwonka ◽  
Eric Bissada ◽  
David P. Goldstein ◽  
Robert E. Wood ◽  
Ernest W. Lam ◽  
...  
Keyword(s):  
Computed Tomography ◽  
High Resolution ◽  
Oral Cancer ◽  
Cone Beam Computed Tomography ◽  
Cone Beam ◽  
Bone Invasion

Clinical cone beam computed tomography compared to high-resolution peripheral computed tomography in the assessment of distal radius bone

2016 ◽  
Vol 27 (10) ◽  
pp. 3073-3082 ◽  
Author(s):  
C. de Charry ◽  
S. Boutroy ◽  
R. Ellouz ◽  
F. Duboeuf ◽  
R. Chapurlat ◽  
...  
Keyword(s):  
Computed Tomography ◽  
High Resolution ◽  
Distal Radius ◽  
Cone Beam Computed Tomography ◽  
Cone Beam

scholarly journals Assessment of Trabecular Bone During Dental Implant Planning using Cone-beam Computed Tomography with High-resolution Parameters

2021 ◽  
Vol 15 (1) ◽  
pp. 57-63
Author(s):  
Lauren Bohner ◽  
Pedro Tortamano ◽  
Felix Gremse ◽  
Israel Chilvarquer ◽  
Johannes Kleinheinz ◽  
...  
Keyword(s):  
Computed Tomography ◽  
High Resolution ◽  
Trabecular Bone ◽  
Cone Beam Computed Tomography ◽  
Volume Fraction ◽  
Statistical Significance ◽  
Cone Beam ◽  
Bone Volume Fraction ◽  
Voxel Size ◽  
Trabecular Thickness

Background: Cone-Beam Computed Tomography (CBCT) with high-resolution parameters may provide an acceptable resolution for bone assessment. Objectives: The purpose of this study is to assess trabecular bone using two cone-beam computed tomography (CBCT) devices with high-resolution parameters in comparison to micro-computed tomography (µCT). Methods: Bone samples (n=8) were acquired from dry mandibles and scanned by two CBCT devices: 1) VV (Veraview R100, Morita; FOV 4x4, 75kV, 9mA, voxel size 0.125µm); and PR (Prexion 3D, Prexion; FOV 5x5, 90kV, 4mA, 37s, voxel size 108µm). Gold-standard images were acquired using µCT (SkyScan 1272; Bruker; 80kV, 125mA, voxel size 16µm). Morphometric parameters (BvTv- Bone Volume Fraction, BsBv- Trabecular specific surface, TbTh- Trabecular thickness and TbSp- Trabecular separation) were measured. Statistical analysis was performed within ANOVA, Spearman Correlation test and Bland-Altmann plots with a statistical significance level at p=0.05. Results: CBCT devices showed similar BvTv values in comparison to µCT. No statistical difference was found for BvTv parameters assessed by CBCT devices and µCT. BsBv values were underestimated by CBCT devices (p<0.01), whereas TbTh and TbSp values were overestimated by them (p<0.01). Positive correlations were found between VV and µCT measurements for BvTv (r2= 0.65, p=0.00), such as between PR and µCT measurements for TbSp (r2= 0.50, p=0.04). For BsBv measurements, PR was negatively correlated with µCT (r2= -0.643, p=0.01). Conclusion: The evaluated CBCT device was able to assess trabecular bone. However, bone parameters were under or overestimated in comparison to µCT.

scholarly journals Absence of pontine perforators in vertebrobasilar dolichoectasia on ultra-high resolution cone-beam computed tomography

2020 ◽  
pp. neurintsurg-2020-016818
Author(s):  
Tomas Dobrocky ◽  
Eike I Piechowiak ◽  
Johannes Goldberg ◽  
Enrique Barvulsky Aleman ◽  
Patrick Nicholson ◽  
...  
Keyword(s):  
Computed Tomography ◽  
High Resolution ◽  
Treatment Planning ◽  
Basilar Artery ◽  
Cone Beam Computed Tomography ◽  
Cone Beam ◽  
Vessel Segment ◽  
Vertebrobasilar Dolichoectasia ◽  
Cerebellar Artery ◽  
The Mean

BackgroundVertebrobasilar dolichoectasia (VBDE) is a rare type of non-saccular intracranial aneurysm, with poor natural history and limited effective treatment options. Visualizing neurovascular microanatomy in patients with VBDE has not been previously reported, but may yield insight into the pathology, and provide important information for treatment planning.ObjectiveTo carry out a retrospective analysis of ultra-high resolution cone-beam computed tomography (UHR-CBCT) in patients with fusiform basilar aneurysms, visualizing neurovascular microanatomy of the posterior circulation with a special focus on the pontine perforators.MethodsUHR-CBCT was performed in seven patients (mean age 59 years; two female) with a VBDE, and in 14 control patients with unrelated conditions.ResultsThe mean maximum diameter of the fusiform vessel segment was 28 mm (range 19–36 mm), and the mean length of the segment was 39 mm (range 15–50 mm). In all patients with VBDE, UHR-CBCT demonstrated an absence of perforating arteries in the fusiform arterial segment and a mean of 3.7 perforators arising from the unaffected vessel segment. The network of interconnected superficial circumferential pontine arteries (brainstem vasocorona) were draping around the aneurysm sac. In controls, a mean of 3.6, 2.5, and 1.2 perforators were demonstrated arising from the distal, mid-, and proximal basilar artery, respectively.ConclusionsThe absence of pontine perforators in the fusiform vessel segment of VBDE is counterbalanced by recruitment of collateral flow from pontine perforators arising from the unaffected segment of the basilar artery, as well as collaterals arising from the anterior inferior cerebellar artery/posterior inferior cerebellar artery and superior cerebellar artery. These alternative routes supply the superficial brainstem arteries (brainstem vasocorona) and sustain brainstem viability. Our findings might have implications for further treatment planning.

scholarly journals Effect of Filtered Back-Projection Filters to Low-Contrast Object Imaging in Ultra-High-Resolution (UHR) Cone-Beam Computed Tomography (CBCT)

Sensors ◽  
2020 ◽  
Vol 20 (22) ◽  
pp. 6416
Author(s):  
Sunghoon Choi ◽  
Chang-Woo Seo ◽  
Bo Kyung Cha
Keyword(s):  
Computed Tomography ◽  
High Resolution ◽  
Spatial Frequency ◽  
Spatial Resolution ◽  
Cone Beam Computed Tomography ◽  
Cone Beam ◽  
Acquisition Time ◽  
Imaging Protocol ◽  
Low Contrast ◽  
Smoothing Window

In this study, the effect of filter schemes on several low-contrast materials was compared using standard and ultra-high-resolution (UHR) cone-beam computed tomography (CBCT) imaging. The performance of the UHR-CBCT was quantified by measuring the modulation transfer function (MTF) and the noise power spectrum (NPS). The MTF was measured at the radial location around the cylindrical phantom, whereas the NPS was measured in the eight different homogeneous regions of interest. Six different filter schemes were designed and implemented in the CT sinogram from each imaging configuration. The experimental results indicated that the filter with smaller smoothing window preserved the MTF up to the highest spatial frequency, but larger NPS. In addition, the UHR imaging protocol provided 1.77 times better spatial resolution than the standard acquisition by comparing the specific spatial frequency (f50) under the same conditions. The f50s with the flat-top window in UHR mode was 1.86, 0.94, 2.52, 2.05, and 1.86 lp/mm for Polyethylene (Material 1, M1), Polystyrene (M2), Nylon (M3), Acrylic (M4), and Polycarbonate (M5), respectively. The smoothing window in the UHR protocol showed a clearer performance in the MTF according to the low-contrast objects, showing agreement with the relative contrast of materials in order of M3, M4, M1, M5, and M2. In conclusion, although the UHR-CBCT showed the disadvantages of acquisition time and radiation dose, it could provide greater spatial resolution with smaller noise property compared to standard imaging; moreover, the optimal window function should be considered in advance for the best UHR performance.

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