scholarly journals X-ray tеsting of structures of keratinized gum and external cortical plate in the field of intact frontal teeth on the upper jaw

2020 ◽  
Vol 20 (1-2) ◽  
pp. 91-95
Author(s):  
Irina A. Kostionova-Ovod
Keyword(s):  
Computed Tomography ◽  
Cortical Plate ◽  
Tooth Crown ◽  
X Ray ◽  
3D Computed Tomography ◽  
Radiological Parameters ◽  
Alveolar Crest ◽  
Apical Direction ◽  
Upper Jaw

Objectives. Сomparison of radiological parameters of the keratinized gum and the external cortical plate in the area of the front teeth on the upper jaw. Material and methods. Сlinical examination of 50 patients aged 18 to 60 years was carried out in order to perform the work. These patients underwent 3D computed tomography which allowed to study the thickness of the keratinized gums in the dental area 1.1, 1.2, 1.3, 2.1, 2.2, 2.3. Results. The results of the research revealed a similar trend at each level of measurement for the central and lateral incisors. The average values of the gum thickness decreased in the direction of the tooth crown. The thickness of the outer cortical plate had the lowest values in all studied teeth at the level of the alveolar crest apex and gradually increased in the apical direction. The thinnest external cortical plate and gums were revealed in canines. Conclusion. The performed study showed that thickness of the gum is directly related to the thickness of the cortical plate. In percentage terms the gum thickness is 132 9.5% of the thickness of the cortical plate.

THE PROGRESSIVE PHENOTYPE OF PNEUMOCONIOSIS

2021 ◽  
Author(s):  
Y.Y. Gorblyansky ◽  
◽  
M.A. Panova ◽  
O.P. Ponamareva
Keyword(s):  
Computed Tomography ◽  
Silicon Dioxide ◽  
Retrospective Analysis ◽  
Russian Federation ◽  
Medical Examination ◽  
X Ray ◽  
Radiological Parameters ◽  
Rostov Region ◽  
The Russian Federation

Abstract: The prevalence of progressive forms of pneumoconiosis in the Russian Federation has been little studied. At the same time, the number of workers exposed to silicon dioxide, both in our country and abroad, is not decreasing. The purpose of our research to determine the criteria for the progression of pneumoconiosis in miners. A retrospective analysis of the results of a comprehensive medical examination of 150 miners of the Rostov region, observed in the center of occupational pathology, was carried out. All patients underwent radiography, computed tomography of the chest organs, and spirometry. X-ray description of the changes was carried out in accordance with the recommendations of the ILO. As a result, 24.5% had statistically significant signs of negative dynamics of functional and radiological indicators, which we referred to the criteria of progression. Thus, the progression of pneumoconiosis is determined by the negative dynamics of clinical and radiological parameters.

X-ray 3D computed tomography of large objects: investigation of an ancient globe created by Vincenzo Coronelli

2007 ◽  
Author(s):  
Maria Pia Morigi ◽  
Franco Casali ◽  
Andrea Berdondini ◽  
Matteo Bettuzzi ◽  
Davide Bianconi ◽  
...  
Keyword(s):  
Computed Tomography ◽  
X Ray ◽  
3D Computed Tomography

X-ray 3D computed tomography of bronze archaeological samples

1999 ◽  
Vol 46 (4) ◽  
pp. 897-903 ◽  
Author(s):  
M. Rossi ◽  
F. Casali ◽  
P. Chirco ◽  
M.P. Morigi ◽  
E. Nava ◽  
...  
Keyword(s):  
Computed Tomography ◽  
X Ray ◽  
3D Computed Tomography

Accurate Extraction of Coronary Vascular Structures in 2D X-ray Angiogram Using Vascular Topology Information in 3D Computed Tomography Angiography

2019 ◽  
Vol 9 (2) ◽  
pp. 242-250
Author(s):  
Taeyong Park ◽  
Sunhye Lim ◽  
Heeryeol Jeong ◽  
Juneseuk Shin ◽  
Jeongjin Lee
Keyword(s):  
Computed Tomography ◽  
Coronary Artery ◽  
Computed Tomography Angiography ◽  
Coronary Intervention ◽  
Depth Information ◽  
Vascular Structure ◽  
3D Registration ◽  
X Ray ◽  
3D Computed Tomography ◽  
Topology Information

Since the 2D X-ray angiogram enables the detection of vascular stenosis in real-time, it is essential for percutaneous coronary intervention (PCI). However, the accurate vascular structure is very difficult to determine due to background clutter and loss of depth information of 2D projection. To cope with these difficulties, we propose a fast and accurate extraction method of a vascular structure in 2D X-ray angiogram (XA) based on the vascular topology information of 3D computed tomography angiography (CTA) of the same patient. First, an initial vascular structure is robustly extracted based on vessel enhancement filtering. Then, 2D XA and 3D CTA are spatially aligned by 2D–3D registration. Finally, the 2D vascular structure is accurately reconstructed based on 3D vascular topology information by measuring the similarity of 2D and 3D vascular segments. Experimental results showed the fast and accurate extraction of a vascular structure using 10 images each of the left coronary artery (LCA) and right coronary artery (RCA). Our method can be used as a computer-aided technology for PCI. Our method can be applied to the study of other various types of vessels.

scholarly journals Uses of X-ray 3D-Computed-Tomography to Monitor the Development of Garlic Shooting Inside the Intact Cloves

2016 ◽  
Vol 54 (1) ◽  
pp. 39-44 ◽  
Author(s):  
Diego COMPARINI ◽  
Toshihiko KIHARA ◽  
Tomonori KAWANO
Keyword(s):  
Computed Tomography ◽  
X Ray ◽  
3D Computed Tomography

scholarly journals Physiologic Cervical Alignment Change between Cervical Spine X-ray and Computed Tomography

2021 ◽  
Vol 64 (5) ◽  
pp. 784-790
Author(s):  
Ho Jin Lee ◽  
Il Sup Kim ◽  
Jae Taek Hong
Keyword(s):  
Computed Tomography ◽  
Cervical Spine ◽  
Sella Turcica ◽  
Spine Deformity ◽  
Sagittal Vertical Axis ◽  
Cervical Alignment ◽  
X Ray ◽  
Radiological Parameters ◽  
C7 Slope ◽  
Upper Cervical

Objective : The purpose of this study was to investigate the correlations among various radiological parameters used to determine cervical alignment from cervical spine radiographs (X-CS) and cervical spine computed tomography (CT-CS), both within and between modalities.Methods : This study included 168 patients (≤60 years old) without a definite whole spine deformity who underwent CT-CS and X-CS. We measured occipital slope (O-s), C1 slope, C2 slope, C7 slope, sella turcica - C7 sagittal vertical axis (StC7-SVA), spinocranial angle, T1 slope, and C27-SVA. We calculated the O-C2 angle, O-C7 angle, and C2-7 angle from the measured parameters and conducted correlation analyses among multiple parameters.Results : The intrinsic correlation features among multiple cervical parameters were very similar for both X-CS and CT-CS. The two SVA parameters (C27-SVA and StC7-SVA) were mainly influenced by the upper cervical slope parameters (r=|0.13–0.74|) rather than the lower slope cervical parameters (r=|0.08–0.13|). The correlation between X-CS and CT-CS for each radiological parameter was statistically significant (r=0.26–0.44) except for O-s (r=0.10) and StC7-SVA (r=0.11).Conclusion : The correlation patterns within X-CS and CT-CS were very similar in this study. The correlation between X-ray and CT was statistically significant for most radiological parameters, and the correlation score increased when the horizontal gaze was consistently maintained. The lower cervical parameters were not statistically associated with translation-related parameters (C2-7 SVA and StC7-SVA). Therefore, the upper cervical segment may be a better predictor for determining head and neck translation.

scholarly journals POSSIBILITIES OF MODERN X-RAY EXAMINATION METHODS FOR DIAGNOSTICS OF HIDDEN DENTAL CARIES OF APPROXIMAL LOCALIZATION

2019 ◽  
Vol 72 (7) ◽  
pp. 1258-1264
Author(s):  
Iryna I. Sokolova ◽  
Svitlana I. German ◽  
Tetiana V. Tomilina ◽  
Yuliia O. Slynko ◽  
Anatoliy M. Potapchuk ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Clinical Diagnostics ◽  
Cone Beam ◽  
Average Depth ◽  
X Ray ◽  
Molar Teeth ◽  
Examination Methods ◽  
Upper Jaw ◽  
Diagnostic Capabilities

Introduction: In case of hidden carious cavities development on the approximal teeth surfaces, the clinical diagnostics of this process is difficult. Then, the diagnostics of carious lesion is not possible without carrying out X-ray examination. The aim of the study was a comparative analysis of the effectiveness of clinical and X-ray diagnostics for hidden caries of approximal teeth surfaces. Materials and methods: Condition of 2 963 teeth of 115 people aged from 19 to 55 was analysed. Additionally, a digital panoramic 2D diagnostics (Planmeca ProSensor, Finland) and Cone Beam Computed Tomography 3D Diagnostics (Morita, Japan) were used for clinical examination of patients. Results: In both variants of diagnostics, the number of caries defects in the upper jaw was higher than in the lower one, and the frequency of caries lesion of various teeth groups had the following sequence in descending order: molar teeth, premolar teeth, incisor teeth and canine teeth. Hidden carious cavities of average depth and deep were detected with almost the same frequency in both variants of the study, which by 1.9 - 2.0 times respectively exceeded the frequency of superficial carious cavities detection (p = 0.0001). According to the results of clinical studies, hidden superficial carious cavities occurred in single cases and X-ray examination improved their diagnostics by 9.6 times (p = 0.0000). Conclusions: X-ray examination allows increasing the effectiveness of diagnostics of hidden carious cavities of approximal localization by 1.2 times on the whole (p <0,05). In such cases orthopantomography (OPG) has reasonably sufficient diagnostic capabilities. Definitely, 3D Cone Beam Computed Tomography (CBCT) has much more diagnostic capabilities, but its use can not be justified for the diagnostics of caries only.

X-ray microtomography

1988 ◽  
Vol 46 ◽  
pp. 998-999
Author(s):  
H.W. Deckman ◽  
B.F. Flannery ◽  
J.H. Dunsmuir ◽  
K.D' Amico
Keyword(s):  
Computed Tomography ◽  
Internal Structure ◽  
Imaging Technique ◽  
Three Dimensional ◽  
Tissue Structure ◽  
Individual Element ◽  
X Ray ◽  
Non Invasive ◽  
Panoramic Imaging ◽  
Three Dimensional Images

We have developed a new X-ray microscope which produces complete three dimensional images of samples. The microscope operates by performing X-ray tomography with unprecedented resolution. Tomography is a non-invasive imaging technique that creates maps of the internal structure of samples from measurement of the attenuation of penetrating radiation. As conventionally practiced in medical Computed Tomography (CT), radiologists produce maps of bone and tissue structure in several planar sections that reveal features with 1mm resolution and 1% contrast. Microtomography extends the capability of CT in several ways. First, the resolution which approaches one micron, is one thousand times higher than that of the medical CT. Second, our approach acquires and analyses the data in a panoramic imaging format that directly produces three-dimensional maps in a series of contiguous stacked planes. Typical maps available today consist of three hundred planar sections each containing 512x512 pixels. Finally, and perhaps of most import scientifically, microtomography using a synchrotron X-ray source, allows us to generate maps of individual element.

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