scholarly journals Computer diagnostic features combining different types of radiographs of the maxillofacial area

2019 ◽  
Vol 10 (3) ◽  
pp. 51-56
Author(s):  
Roman S. Subbotin ◽  
Margarita N. Puzdyreva ◽  
Igor V. Fomin ◽  
Sergey B. Fishchev ◽  
Andrey A. Kondratyuk
Keyword(s):  
Computed Tomography ◽  
Spatial Arrangement ◽  
Reference Points ◽  
Diagnostic Methods ◽  
Anatomical Landmarks ◽  
Diagnostic Features ◽  
Lateral Projection ◽  
X Ray ◽  
Articular Process ◽  
Conditional Median

The introduction of new digital technologies into clinical practice and the improvement of X-ray equipment made it possible to widely use the method of cone-beam computed tomography and other X-ray methods of research. However, it is necessary to improve diagnostic methods by combining different research methods. Aim. Improvement of the method of investigation of the spatial arrangement of elements of the temporomandibular joint and medial incisors of the upper and lower jaw. Materials and methods. The study analyzed teleroentgenogram in the lateral projection and computed tomography of 292 people with no signs of organic pathology of the maxillofacial region. Generally accepted in orthodontics morphological points and anatomical landmarks were used. Results. The proposed method of combining computer tomography mandibular joint and medial cuts antagonists with teleroentgenograms of the head in lateral projection. The main reference points were the C points at the top of the articular process and the auditory passage of tomograms, which were combined with respect to the craniocerebral horizontal. When applying tomograms cutters guidance was conditional median vertical cutters, which were combined with lines forming mezhrassovyy angle teleroentgenogram, as well as the front vertical face (N – Pg), and the period Pg. Conclusion. The study proposed matching algorithm telerentgenogram and some portions of the tomograms of the temporomandibular joints and the medial incisors in the occlusal relationship.

scholarly journals Reducing radiation exposure in newborns with birth head trauma

2017 ◽  
Vol 5 (4) ◽  
pp. 24-30
Author(s):  
Irina A. Kriukova ◽  
Evgeniy Y. Kriukov ◽  
Danil A. Kozyrev ◽  
Semen A. Sotniкov ◽  
Dmitriy A. Iova ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Radiation Exposure ◽  
Head Trauma ◽  
Bone Structure ◽  
Bone Fractures ◽  
Diagnostic Methods ◽  
Cranial Bone ◽  
X Ray ◽  
Reduce Radiation Exposure ◽  
Risk Of Cancer

Background. Birth head trauma causing intracranial injury is one of the most common causes of neonatal mortality and morbidity. In case of suspected cranial fractures and intracranial hematomas, diagnostic methods involving radiation, such as x-ray radiography and computed tomography, are recommended. Recently, an increasing number of studies have highlighted the risk of cancer complications associated with computed tomography in infants. Therefore, diagnostic methods that reduce radiation exposure in neonates are important. One such method is ultrasonography (US). Aim. We evaluated US as a non-ionizing radiation method for diagnosis of cranial bone fractures and epidural hematomas in newborns with cephalohematomas or other birth head traumas. Material and methods. The study group included 449 newborns with the most common variant of birth head trauma: cephalohematomas. All newborns underwent transcranial-transfontanelle US for detection of intracranial changes and cranial US for visualization of bone structure in the cephalohematoma region. Children with ultrasonic signs of cranial fractures and epidural hematomas were further examined at a children’s hospital by x-ray radiography and/or computed tomography. Results and discussion. We found that cranial US for diagnosis of cranial fractures and transcranial-transfontanelle US for diagnosis of epidural hematomas in newborns were highly effective. In newborns with parietal cephalohematomas (444 children), 17 (3.8%) had US signs of linear fracture of the parietal bone, and 5 (1.1%) had signs of ipsilateral epidural hematoma. Epidural hematomas were visualized only when US was performed through the temporal bone and not by using the transfontanelle approach. Sixteen cases of linear fractures and all epidural hematomas were confirmed by computed tomography. Conclusion. The use of US diagnostic methods reduced radiation exposure in newborns with birth head trauma. US methods (transcranial-transfontanelle and cranial) can be used in screening for diagnosis and personalized monitoring of changes in birth head trauma as well as to reduce radiation exposure.

Two methods of using X-ray Computed Tomography to predict carcass composition in sheep

2005 ◽  
Vol 2005 ◽  
pp. 42-42
Author(s):  
J. M. Macfarlane ◽  
R. M. Lewis ◽  
G. C. Emmans ◽  
J.M. Young ◽  
G. Simm
Keyword(s):  
Computed Tomography ◽  
Ct Scanning ◽  
Carcass Composition ◽  
The Body ◽  
Anatomical Landmarks ◽  
Cross Sectional ◽  
X Ray ◽  
X Ray Computed ◽  
Breed Selection ◽  
The Individual

X-ray computed tomography (CT) can be used to accurately assess carcass composition in sheep (Sehested, 1984; Young et al., 2001) both in research and commercially, as part of a breed selection programme. Two different CT scanning methods have been used: a) the reference scan method where tissue weights are predicted from tissue areas in a small set of cross-sectional scans at ‘anatomical landmarks’, and b) the Cavalieri method where a larger number of scans are taken along the body. It is of interest to examine the accuracy of evaluations made using these two methods and the individual merits of the two methods depending on their application.

scholarly journals DIAGNOSTICS OF INFLAMMATORY INSIDE THE PLEURAL COMPLICATIONS OF THORACIC INJURY

2018 ◽  
Keyword(s):  
Computed Tomography ◽  
Clinical Signs ◽  
Pathological Process ◽  
Spiral Computed Tomography ◽  
Diagnostic Methods ◽  
Thoracic Wall ◽  
Thoracic Injury ◽  
Spiral Computed ◽  
Secondary Complications ◽  
X Ray

The non-specificity of the clinical signs of posttraumatic purulent thoracic complications indicates the importance of instrumental diagnostic methods. There is no generally accepted algorithm for examining an injured person with a chest injury that would allow timely recognition of purulent complications in the posttraumatic period. The results of the examination of patients with intra-pleural complications of thoracic injury using the spiral computed tomography method, which in dynamics allows objectively documenting the dynamics of the pathological process, evaluating the effectiveness of treatment, timely diagnose secondary complications, are presented. Тhe analysis of the results of the study indicates the need for a comprehensive examination of suspected post-traumatic intra pleural thoracic complications. In the presence of any manifestations of systemic inflammatory response in the posttraumatic period in patients with chest lesions, regardless of the results of the X-ray examination, ultrasound examination and computed tomography of the chest should be performed, which allows to detect the accumulation of pathological contents in the pleural and pericardial cavity, to assess the nature changes in the pulmonary tissue, mediastinum, thoracic wall and decide on the drainage of lesions fester. At the same time, for the correct interpretation of some changes in spiral computed tomography, including the lung abscess that developed in the background of pulmonary hemorrhages and mediastinitis against the background of hemorrhages in the mediastinum and pneumomediastinum, it is necessary to compare them with the baseline data. This testifies to the necessity of performing an early spiral computed tomographic examination in patients with chest lesions in the presence of any focal changes on the review X-ray. Spiral computer tomography of the chest in dynamics allows to objectively document the dynamics of the pathological process, evaluate the effectiveness of treatment, timely diagnose secondary complications. The application of this algorithm allows to diagnose the entire spectrum of intra-pleural complications in the early stages and to avoid diagnostic errors.

scholarly journals Diagnostic Strategies for Recurrent Cervical Cancer: A Cohort Study

2020 ◽  
Vol 10 ◽  
Author(s):  
Xiaopei Chao ◽  
Junning Fan ◽  
Xiaochen Song ◽  
Yan You ◽  
Huanwen Wu ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cervical Cancer ◽  
Clinical Manifestations ◽  
Primary Treatment ◽  
Diagnostic Methods ◽  
Survival Outcomes ◽  
Recurrent Cervical Cancer ◽  
X Ray ◽  
Diagnostic Strategies ◽  
Chest X Ray

ObjectiveThe effectiveness of various strategies for the post-treatment monitoring of cervical cancer is unclear. This pilot study was conducted to explore recurrence patterns in and diagnostic strategies for patients with uterine cervical cancer who were meticulously followed using a customized monitoring plan.MethodsThe epidemiological and clinical data of patients with recurrent cervical cancer treated from March 2012 to April 2018 at a tertiary teaching hospital were retrospectively collected. The diagnostic methods and their reliability were compared across patients with various clinicopathological characteristics and were associated with survival outcomes.ResultsTwo hundred sixty-four patients with recurrent cervical cancer were included in the study, among which recurrence occurred in the first three years after the last primary treatment in 214 patients (81.06%). Half of the recurrence events (50.76%) occurred only within the pelvic cavity, and most lesions (78.41%) were multiple in nature. Among all recurrent cases, approximately half were diagnosed based on clinical manifestations (n=117, 44.32%), followed by imaging examinations (n=76, 28.79%), serum tumor markers (n=34, 12.88%), physical examinations (n=33, 12.50%) and cervical cytology with or without high-risk human papillomavirus (hrHPV) testing (n=4, 1.52%). The reliability of the diagnostic methods was affected by the stage (p<0.001), primary treatment regimen (p=0.001), disease-free survival (p=0.022), recurrence site (p=0.002) and number of recurrence sites (p=0.001). Primary imaging methods (sonography and chest X-ray) were not inferior to secondary imaging methods (computed tomography, magnetic resonance imaging and positron emission tomography-computed tomography) in the detection of recurrence. The chest X-ray examination only detected three cases (1.14%) of recurrence. Patients assessed with various diagnostic strategies had similar progression-free and overall survival outcomes.ConclusionsA meticulous evaluation of clinical manifestations might allow recurrence to be discovered in a timely manner in most patients with cervical cancer. Specific diagnostic methods for revealing recurrence were not associated with the survival outcomes.

scholarly journals The role of computed tomography in the diagnosis of lung cancer - a case report

2022 ◽  
Vol 12 (1) ◽  
pp. 138-146
Author(s):  
Justyna Cabaj ◽  
Julia Bargieł ◽  
Izabela Chmielewska ◽  
Janusz Milanowski
Keyword(s):  
Computed Tomography ◽  
Lung Cancer ◽  
Diagnostic Procedures ◽  
Diagnostic Methods ◽  
Neoplastic Disease ◽  
Significant Deterioration ◽  
X Ray ◽  
Entire Lung ◽  
History Of ◽  
Diagnosis Of Lung Cancer

Introduction Lung cancer has been the main oncological problem in the world for years. It is extremely important to use appropriate diagnostic methods that enable its detection and implementation of appropriate treatment. Aim The presented case shows the advantage of computed tomography over chest X-ray (X-ray) in visualizing neoplastic changes in the lungs. Case Study The paper presents a description of a patient diagnosed with centrally located advanced lung adenocarcinoma with a strong expression of PD-L1 qualified for treatment with pembrolizumab. Results and Discussion Presented case confirms that X-ray is less sensitive, especially in the case of centrally located tumors. Therefore, the emergence of a new cough in a smoker or ex-smoker should raise concerns related to lung cancer despite a normal X-ray image. The central location of the tumor may cause dramatic course of the symptoms. In the presented case, a sudden significant deterioration of the condition was observed due to atelectasis of the entire lung. Haemoptysis observed during hospitalization was another symptom of centraly located tumor mass. Conclusions In conclusion, the history of cigarette smoking, presence of typical symptoms should provide an in-depth diagnosis of lung cancer, despite normal X-ray. Diagnostic procedures include computed tomography in the first place. The course of centrally localized disease may change rapidly during on first cycle of treatment. Due to the possibility of serious complications of the ongoing neoplastic disease, the patient should be under constant medical supervision.

Application of X-ray computed tomography to soil science: A literature review

2008 ◽  
Vol 88 (1) ◽  
pp. 1-19 ◽  
Author(s):  
I A Taina ◽  
R J Heck ◽  
T R Elliot
Keyword(s):  
Computed Tomography ◽  
Spatial Configuration ◽  
Energy Levels ◽  
Three Dimensional ◽  
Spatial Arrangement ◽  
Invasive Technique ◽  
Reconstruction Algorithms ◽  
Biotic Factor ◽  
X Ray ◽  
X Ray Computed

The study of the spatial configuration of soil, in its complexity, requires an understanding of the interrelations and interactions between the diverse soil constituents, at various levels of organization. Investigations of the spatial arrangement of the mineral and organic components of soil have benefited from the development of techniques for structural analysis. X-ray computed tomography (CT) is a non-destructive and non-invasive technique that has been successfully used for three-dimensional (3D) examination of soil. Valuable information has been obtained by the application of CT for the description and quantitative measurements of soil structure elements, especially of soil pores and pore network features. In many studies, X-ray CT has been used to investigate the hydro-physical characteristics of the soil, in a functional and temporal manner. A dynamic approach has also been utilized in the evaluation of the biotic factor influence on soil. The analysis of soil solid phases, by X-ray CT, has been challenging due to the similar X-ray attenuation of different solid constituents. However, the use of multiple X-ray energy levels has facilitated the discrimination of minerals in soil. The aim of this review and synthesis is to offer a perspective on the major issues related to application of the technique, general attempted solutions and possible directions in the utilization of X-ray CT in soil research. Relevant scanning parameters, procedures for CT image reconstruction, algorithms for the quantification of soil characteristics and results are presented for each type of application. Key words: X-ray computed tomography, energy level, spatial resolution, segmentation, soil mineral and organic constituents, soil physical and hydro-physical properties, soil biota

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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