scholarly journals Comparison of a novel weight bearing cone beam computed tomography (CT) scanner versus a conventional CT scanner for measuring

2016 ◽  
Vol 1 (5) ◽  
Author(s):  
John M. Marzo
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Weight Bearing ◽  
Cone Beam ◽  
Ct Scanner ◽  
Conventional Ct

scholarly journals Comparison of the Hounsfield Unit Values Obtained From Cone-Beam Computed Tomography (CBCT) and Multidetector Computed Tomography (MDCT) Images for Different Bone Densities

2021 ◽  
Vol 7 (2) ◽  
Author(s):  
Atefeh Khavid ◽  
Mojgan Sametzadeh ◽  
Mostafa Godiny ◽  
Mohammad Mehdi Moarrefpour
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Pearson Correlation ◽  
Hounsfield Unit ◽  
Cone Beam ◽  
Ct Scanner ◽  
Significance Level ◽  
Dental Practitioners ◽  
Significant Difference ◽  
The Mean

Background and objective: In recent years, cone-beam computed tomography (CBCT) has become a key diagnostic tool in dentistry. CBCT can provide 3D images of the maxillofacial area to help dental practitioners in diagnosis and treatment, especially implant placement and treatment of pathogenic lesions. This study aimed to compare the Hounsfield Unit (HU) values obtained from CBCT images for bones of different densities with the corresponding HU values from MDCT images. Materials and methods: cube-shaped bone blocks of identical size were cut from the middle section of the cow ribs and femur area such that they had a layer of cortical bone in their buccal, lingual, and top surfaces and trabecular bone in the middle. MDCT scans were performed using a Somatom Sensation Ct Scanner. After determining HU from the results of these scans, nine suitable specimens from different ranges of HU were chosen for comparison. HU of the CBCT images was computed by the dedicated software of the CBCT machine. Finally, HU values obtained from MDCT and CBCT were compared. Data analysis was performed using SPSS version 25 at the 0.05 significance level. Results: The results showed a statistically significant difference between the mean HU from MDCT images and the mean HU from CBCT images (P<0.05). For similar specimens, CBCT produced higher mean HU values than MDCT. The Pearson correlation test detected a significant direct relationship between the HU values of specimens in MDCT and CBCT (P<0.05). Conclusion: For the tools and software used in this study, there was no significant difference between the HU values obtained from MDCT and CBCT, but the mean HU obtained from CBCT was higher than that from MDCT.

Weight Bearing Cone Beam Computed Tomography (WBCT) in the Foot and Ankle

2020 ◽  
Author(s):  
Martinus Richter ◽  
Francois Lintz ◽  
Cesar de Cesar Netto ◽  
Alexej Barg ◽  
Arne Burssens ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Weight Bearing ◽  
Cone Beam ◽  
Foot And Ankle

Weight-bearing radiographs and cone-beam computed tomography examinations in adult acquired flatfoot deformity

2020 ◽  
Author(s):  
Delaram Shakoor ◽  
Cesar de Cesar Netto ◽  
Gaurav K Thawait ◽  
Scott J Ellis ◽  
Martinus Richter ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Weight Bearing ◽  
Cone Beam ◽  
Adult Acquired Flatfoot Deformity

scholarly journals Correction to: Weight Bearing Cone Beam Computed Tomography (WBCT) in the Foot and Ankle

2020 ◽  
pp. C1-C1
Author(s):  
Martinus Richter ◽  
Francois Lintz ◽  
Cesar de Cesar Netto ◽  
Alexej Barg ◽  
Arne Burssens ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Weight Bearing ◽  
Cone Beam ◽  
Foot And Ankle

scholarly journals Cone Beam Computed Tomography Application in Finding Ectopic Tooth: A Systemic Analysis and a Case Report

2019 ◽  
Vol 7 (24) ◽  
pp. 4333-4336
Author(s):  
Vo Truong Nhu Ngoc ◽  
Le Quynh Anh ◽  
Nguyen Minh Duc ◽  
Thien Chu Dinh ◽  
Toi Chu Dinh
Keyword(s):  
Computed Tomography ◽  
Case Report ◽  
Maxillary Sinus ◽  
Cone Beam Computed Tomography ◽  
Cone Beam ◽  
Ct Scanner ◽  
Systemic Analysis ◽  
Rare Phenomenon ◽  
Asymptomatic Patients ◽  
Ectopic Tooth

BACKGROUND: Nowadays, cone beam computed tomography (CBCT) are commonly used in dentistry with an advantage about significantly lower dose comparing with CT-Scanner. Utilizing CBCT images which are indicated in dentistry like orthodontics can help diagnose diseases beyond dentistry field. One rare phenomenon can be seen in maxillary sinus, which is often overlooked by dentists, is ectopic teeth. CASE REPORT: This article describes one orthodontic case found accidentally an ectopic tooth in maxillary sinus by inspecting CBCT images. CONCLUSION: Dentists and oral radiologists should carefully inspect non-dental structures, like maxillary sinus, even its distance from the dentoalveolar region, especially in asymptomatic patients.

Marker-less assessment of the geometric error of fused cone-beam computed tomography images of the foot constructed using stitching software

2020 ◽  
pp. 028418512096395
Author(s):  
Ruud HH Wellenberg ◽  
Johannes GG Dobbe ◽  
Jukka Erkkilä ◽  
Mario Maas ◽  
Geert J Streekstra
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Lower Leg ◽  
Geometric Error ◽  
Cone Beam ◽  
Validation Method ◽  
First Metatarsal ◽  
Computed Tomography Images ◽  
Conventional Ct ◽  
Translation Errors

Background Image noise, object repositioning, initial manual image alignment, and stitching of different volumes, i.e. anatomical regions may all affect the stitching error of fused cone-beam computed tomography (CBCT) images. Purpose To determine the geometric error of fused CBCT images of the hindfoot, lower leg, and forefoot after using stitching software, based on a marker-less validation method. Material and Methods CBCT images of the hindfoot, lower leg, and forefoot were acquired multiple times on a Planmed Verity scanner with and without repositioning the leg between acquisitions. Prototype stitching software was used to stitch hindfoot–forefoot volumes and hindfoot–lower leg volumes. Stitching error was determined via registration and by calculating the displacement of the tibia, first metatarsal, or proximal phalanges, with respect to the calcaneus, compared to their position on conventional CT. Results Overall total translation and rotation errors were 1.22 ± 0.62 mm (range 0.43–3.07 mm) and 1.27° ± 0.53° (range 0.29°–2.88°). Lower leg translation was smaller compared to forefoot translation ( P < 0.001). No statistical difference was observed between lower leg and forefoot rotation errors ( P = 0.186). Cadaver repositioning between acquisitions resulted in larger rotation errors ( P < 0.05). Cadaver repositioning did not affect translation errors ( P = 0.768). Conclusion Geometric error of fused CBCT images can be quantified using a marker-less validation method. Stitching of hindfoot volumes with forefoot and lower leg volumes induces translation and rotation errors of up to approximately 3 mm and 3°. Translation errors are larger in hindfoot–forefoot stitches compared to hindfoot–lower leg stitches.

scholarly journals Intraoperative use of cone-beam computed tomography in a cadaveric ossified cochlea model

2009 ◽  
Vol 140 (5) ◽  
pp. 697-702 ◽  
Author(s):  
Emma Barker ◽  
Keith Trimble ◽  
Harley Chan ◽  
James Ramsden ◽  
Sajendra Nithiananthan ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Temporal Bone ◽  
Cone Beam Computed Tomography ◽  
Intraoperative Imaging ◽  
Electrode Array ◽  
Cone Beam ◽  
Electrode Placement ◽  
Electrode Arrays ◽  
Labyrinthitis Ossificans ◽  
Conventional Ct

Objectives: To describe a cadaveric temporal bone model of labyrinthitis ossificans and investigate the utility of intraoperative cone-beam computed tomography (CBCT) in the facilitating cochlear implantation. Design: Cadaveric temporal bone study. Methods: Five cadaveric heads had cement introduced into the 10 cochleas. CBCT and a conventional CT scan were compared to assess the extent of cochlear obliteration. The cement was drilled-out (under CBCT guidance, if required) and cochlear implant electrode arrays (from 3 different manufacturers) inserted. Results: CBCT images demonstrated temporal bone anatomy and the extent of cochlear obliteration as clearly as conventional CT in all cases. Intraoperative CBCT guided drilling and facilitated electrode placement in two of five heads (3 of 10 ears). Streak-artifact from the electrodes of two devices partially obscured image clarity. Conclusions: The obliterated cochlear model reproduced a disease-ossified cochlear both radiographically and surgically. CBCT is useful for intraoperative imaging to facilitate electrode array placement in the obliterated or congenitally abnormal cochlea.

Relationship Between Chronic Lateral Ankle Instability and Hindfoot Varus Using Weight-Bearing Cone Beam Computed Tomography

2019 ◽  
Vol 40 (10) ◽  
pp. 1175-1181 ◽  
Author(s):  
François Lintz ◽  
Alessio Bernasconi ◽  
Louise Baschet ◽  
Céline Fernando ◽  
Nazim Mehdi ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Ankle Instability ◽  
Weight Bearing ◽  
Univariate Analysis ◽  
Cone Beam ◽  
Hindfoot Alignment ◽  
Lateral Ankle ◽  
Chronic Lateral Ankle Instability ◽  
Lateral Ankle Instability

Background: Varus hindfoot deformity may increase the risk of chronic lateral ankle instability (CLAI). Our aim was to analyze hindfoot alignment (HFA) in patients with CLAI using weight-bearing cone beam computed tomography (WBCT) to assess this risk. Methods: This retrospective, comparative analysis was carried out using an existing WBCT database (Talas, CurveBeam LLC), including data sets for 370 consecutive feet (189 patients) obtained between July 2016 and October 2018 at a single institution. The software provided semiautomated measurement of HFA, given as foot ankle offset (FAO). Univariate analysis was conducted to compare feet with and without CLAI against sex, age, body mass index, and FAO. Significant variables were included in a multivariable logistic model with random effects to take into account correlation between feet of the same patient. Results: Forty-three feet had CLAI (34 patients). FAO ( P = .0009) was significant for CLAI by univariate analysis. Mean FAO was −2.2% ± 5.5% (varus) and + 2.6% ± 4.7% (valgus) with and without CLAI history, respectively. Multivariable logistic regression adjusted for sex and age demonstrated a 35% increased odds ratio (OR) of CLAI per 1% reduction in FAO value (varus) (adjusted OR=0.64, 95% confidence interval [CI]: 0.49-0.84; P = .001) and no significant effect of sex (adjusted OR=0.52; P = .617) or age (adjusted OR=0.94; P = .165) after adjustment for FAO. Conclusion: A positive relationship was found between varus HFA and the risk to have CLAI. Systematic recording of FAO measurements from WBCT images along with clinical data regarding CLAI history proved successful at quantifying the risk of CLAI. Level of Evidence: Level III, retrospective cohort study.

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