Extended parallel backprojection for standard three-dimensional and phase-correlated four-dimensional axial and spiral cone-beam CT with arbitrary pitch, arbitrary cone-angle, and 100% dose usage

2004 ◽  
Vol 31 (6) ◽  
pp. 1623-1641 ◽  
Author(s):  
Marc Kachelrieß ◽  
Michael Knaup ◽  
Willi A. Kalender
Keyword(s):  
Cone Beam Ct ◽  
Cone Angle ◽  
Three Dimensional ◽  
Cone Beam ◽  
Arbitrary Cone

Three dimensional cone-beam CT sialography in non tumour salivary pathologies: procedure and results

2019 ◽  
Vol 48 ◽  
pp. 226
Author(s):  
H. Bertin ◽  
R. Bonnet ◽  
M. Anquetil ◽  
A.S. Delemazure ◽  
E. Mourrain-Langlois ◽  
...  
Keyword(s):  
Cone Beam Ct ◽  
Three Dimensional ◽  
Cone Beam ◽  
Dimensional Cone

scholarly journals The correlation between the three-dimensional radiolucency area around the crown of impacted maxillary canines and dentigerous cysts

2020 ◽  
Vol 49 (4) ◽  
pp. 20190402
Author(s):  
Junliang Chen ◽  
Dongmei Lv ◽  
MingXia Li ◽  
Wei Zhao ◽  
Yun He
Keyword(s):  
Cone Beam Ct ◽  
Dentigerous Cyst ◽  
Three Dimensional ◽  
Cone Beam ◽  
Hard Tissue ◽  
Mean Values ◽  
Dentigerous Cysts ◽  
Impacted Canine ◽  
The Mean ◽  
Surgical Operations

This study aimed to reveal the correlation between the radiolucency area around the crown of impacted maxillary canines and dentigerous cysts using cone beam CT (CBCT). CBCT data were obtained from patients with impacted maxillary canines. Three points of five areas (tooth cusp area and buccal, lingual, mesial and distal areas of the crown) were randomly selected, and the distance between the point and the surrounding hard tissue was measured respectively. The mean values were recorded as the radiolucency area. These results were compared with the occurrence of dentigerous cysts during surgery. 58 patients with 76 impacted maxillary canines were included. 14 of the 76 impacted canines were accompanied by cysts (18.42%). With the increase in the thickness of the radiolucency area, the incidence of cysts was significantly increased (p < 0.05). No cysts were found in the compacted canines with 0–1 mm thickness of the radiolucency area. The highest incidence (71.43%) was observed in canines with 3–4 mm thickness of the radiolucency area. This study found that the thickness of the radiolucency area around the crown of the maxillary impacted canine was closely related to the occurrence of dentigerous cysts. CBCT can be used to estimate the occurrence possibility of dentigerous cyst and guide surgical operations.

Three-dimensional C-arm Cone-beam CT: Applications in the Interventional Suite

2009 ◽  
Vol 20 (7) ◽  
pp. S523-S537 ◽  
Author(s):  
Michael J. Wallace ◽  
Michael D. Kuo ◽  
Craig Glaiberman ◽  
Christoph A. Binkert ◽  
Robert C. Orth ◽  
...  
Keyword(s):  
Cone Beam Ct ◽  
Three Dimensional ◽  
Cone Beam

scholarly journals Taurodontism and Van der Woude Syndrome

2008 ◽  
Vol 78 (5) ◽  
pp. 832-837 ◽  
Author(s):  
Hiroyuki Nawa ◽  
Snehlata Oberoi ◽  
Karin Vargervik
Keyword(s):  
Clinical Sample ◽  
Cone Beam Ct ◽  
Three Dimensional ◽  
Panoramic Radiograph ◽  
Cross Sectional Study ◽  
Cone Beam ◽  
Linear Measurements ◽  
Van Der Woude Syndrome ◽  
Cross Sectional ◽  
Mandibular First Molar

Abstract Objective: To report the occurrence of taurodontism in a clinical sample of Van der Woude syndrome (VWS) and describe its association with hypodontia and cleft type. Materials and Methods: This retrospective, cross-sectional study was carried out on chart reviews and radiographs of 13 persons with VWS. Mean age was 10 years 11 months ± 1 year 5 months. Panoramic radiographs were used to confirm the presence or absence of teeth and to measure crown body and root lengths of mandibular first molars. Three-dimensional cone beam computed tomography (CT) scans were available on two persons with VWS. Both volumetric and linear measurements were obtained. Results: The occurrence of taurodontism of the mandibular first molar was 35%: 27% hypodont and 8% mesodont. Of the 13 subjects with VWS, 6 (4 males and 2 females) had at least one tooth identified with taurodontism. Half of the cases were unilateral and half were bilateral, and all of the unilateral cases were on the left side. Five of the six subjects with taurodontism had missing incisors and premolars. Taurodontism was two times more frequent in those who were missing their second premolars than in those who had their second premolars. There was no correlation between cleft type and presence of taurodontism. The cone beam CT pilot study on two persons showed very abnormal morphology of both crown and roots, which was not apparent on the standard panoramic radiograph. Both the volumetric and linear measurements of the ratio of crown body to root were highly indicative of taurodontism. Further genetic studies are needed. Conclusion: There is a likely association between VWS and taurodontism.

Multi-x-ray source array for stationary tomosynthesisor multi-cone angle cone beam CT

2019 ◽  
Author(s):  
John M. Boone ◽  
Amy E. Becker ◽  
Andrew M. Hernandez ◽  
James T. Dobbins ◽  
Paul Schwoebelc
Keyword(s):  
Cone Beam Ct ◽  
Cone Angle ◽  
Cone Beam ◽  
X Ray ◽  
Source Array

scholarly journals Evaluation of three-dimensional iterative image reconstruction in C-arm-based interventional cone-beam CT

Medicine ◽  
2019 ◽  
Vol 98 (13) ◽  
pp. e14947
Author(s):  
Shigeru Suzuki ◽  
Yoshiaki Katada ◽  
Tomoko Takayanagi ◽  
Haruto Sugawara ◽  
Takuya Ishikawa ◽  
...  
Keyword(s):  
Image Reconstruction ◽  
Cone Beam Ct ◽  
Three Dimensional ◽  
Cone Beam ◽  
Iterative Image Reconstruction
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