Relevant bibliographies by topics / Tomography, radiographic

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Tomography, radiographic'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Tomography, radiographic"

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Decusară, Mioara, Cerasella-Dorina Şincar, Alexandru Nicolau, and Teodora Denisa Gheorghi. "The importance of 3D imaging for the orthodontic diagnosis and treatment." Romanian Journal of Stomatology 62, no. 4 (2016): 183–89. http://dx.doi.org/10.37897/rjs.2016.4.3.

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Within a century, dental radiology “suffered” transformation, beginning with periapical radiographs, cephalograms and panoramic radiography and continuing with digital imaging and cone beam computed tomography. In contemporary dental practice is importantant to choose the type of radiographic investigation in order to achieve a complete and accurate diagnosis, so necessary for determining the treatment plan for patients with dental-maxillary abnormalities. We conducted a comparative study between conventional radiographic investigation (periapical radiographs, panoramic radiography) and cone beam computed tomography in patients with malocclusions. The costs and radiation doses are low to the classic X-rays, but the diagnosis is given by the two-dimensional image of a three-dimensional dental-maxillary pathologies. Cone Beam CT scans were relatively high in cost and in radiation doses, but provided three-dimensional images and anatomic and radiological data of superior quality to the classics.
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Andrade, C. R., B. W. Minto, R. M. Dreibi, et al. "Comparison of radiographic and tomographic evaluations for measurement of the Canal Flare Index in dogs." Arquivo Brasileiro de Medicina Veterinária e Zootecnia 73, no. 3 (2021): 571–82. http://dx.doi.org/10.1590/1678-4162-11987.

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ABSTRACT The outcome of total hip arthroplasty (THA) in dogs is directly related to surgical planning. Templating of radiographs prior to THA should help the surgeon anticipate prosthesis size and femoral shape allowing canal fill of the proximal metaphysis by the implant ensuring primary stable fixation. The canal flare index (CFI) obtained from radiograph has been used as a measure of risk of complications for the technique in human beings and dogs. However, standard radiographs only provide limited data for the selection of cementless prostheses and the assessment of their fit within the femoral canal, due to factors like radiographic magnification and femoral rotation. Therefore, three-dimensional evaluation based on computed tomography (CT) may be a better tool for CFI measurement. The aim of this study was to compare anatomical measurement with CFI values obtained from craniocaudal radiography and CT. Craniocaudal radiographs using a horizontal radiographic beam (CR), CT, and anatomical macroscopic measurements (A) were obtained from 45 femurs from 23 canine cadavers. The differences between the values of CFI obtained from radiograph (CFI-R), computed tomography on transverse (CFI- TT) and longitudinal axis (CFI-TL) compared to the CFI obtained from macroscopic measurements - gold standard - (CFI-A), and 95% limits of agreement (LOA) between the values, were evaluated by the Bland-Altman method. Dimensions obtained from CT techniques had a greatest mean difference from anatomical and CFI values were also different (P=0.032). Under the experimental conditions, the craniocaudal radiograph, provided the most accurate measurement of the CFI (mean difference: 0.087 ± 0.42).
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Stenlund, B., O. Marions, K. F. Engström, and I. Goldie. "Correlation of Macroscopic Osteoarthrotic Changes and Radiographic Findings in the Acromioclavicular Joint." Acta Radiologica 29, no. 5 (1988): 571–76. http://dx.doi.org/10.1177/028418518802900516.

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In a total of 108 acromioclavicular articulations from cadavers the osteoarthrotic changes were studied. The articulations were macroscopically and radiographically ranked according to their grade of osteoarthrosis. The two ranking lines were correlated statistically and showed a rank correlation of 0.741. In 38 articulations tomography was also carried out. These articulations were classified into five grades of osteoarthrosis and the macroscopic, conventional radiographic and tomographic gradings were compared. The correlation coefficient for tomography versus macroscopy was 0.714. Tomography versus standard radiography showed a correlation of 0.767 and standard radiography versus macroscopy a correlation of 0.841. The standard radiographic investigation reveals moderate and severe osteoarthrotic changes in the acromioclavicular joint but cannot depict smaller changes. Tomography does not seem to improve the specificity. There is a need for a better radiologic technique in the examination of the acromioclavicular joint. Radiography during some kind of loading might be a practical way of improving the specificity and make it possible to show early osteoarthrosis in the acromioclavicular articulation.
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Lee, H., J. Kim, Y. Cho, M. Kim, N. Kim, and K. Lee. "Three-dimensional computed tomographic volume rendering imaging as a teaching tool in veterinary radiology instruction." Veterinární Medicína 55, No. 12 (2010): 603–9. http://dx.doi.org/10.17221/2950-vetmed.

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The educational value of three-dimensional computed tomography (3D CT) volume rendering imaging was compared to conventional plain radiographic instruction in a veterinary radiology class. Veterinary radiology is an important subject in veterinary medicine and has been well-recognized as a primary diagnostic method. Many junior and senior students have difficulty interpreting two dimensional radiographs that depict three-dimensional organs. A total of 158 junior veterinary students with knowledge of anatomy, pathology, physiology, and other basic subjects were divided into two groups; Group 1 (n = 45) received conventional radiographic instruction using normal and representative abnormal canine thoracic and abdominal radiographs followed by repetition of the same one week later, while Group 2 (n = 113) received plain radiograph instruction as in Group 1 followed by volume-rendered 3D CT images from the same canine patient one week later. The evaluations were performed at the end of each instruction. In Group 1, the majority did not understand the radiographic signs and no significant improvement was observed. In Group 2, 13% and 20% of the students learned only from radiographs, and understood the thoracic and abdominal radiographic alterations, respectively. After studying the 3D CT images, more than 94% of the students deduced the reasons for the radiographic alterations on the radiographs (P < 0.001). These results strongly suggest that 3D CT imaging is an effective tool for teaching radiographic anatomy to veterinary medical students.
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Lacava, Giuseppe, Eric Zini, Federica Marchesotti, et al. "Computed tomography, radiology and echocardiography in cats naturally infected with Aelurostrongylus abstrusus." Journal of Feline Medicine and Surgery 19, no. 4 (2016): 446–53. http://dx.doi.org/10.1177/1098612x16636419.

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Objectives The aims of the study were to describe the radiographic and computed tomographic features in cats naturally infected with Aelurostrongylus abstrusus, and to identify signs of pulmonary hypertension with echocardiography. Methods Fourteen cats positive on Baermann test for A abstrusus were included in the study. All cats underwent thoracic radiography, CT and echocardiography. Results The most common clinical signs were coughing (10/14) and dyspnoea (5/14). Radiographic findings included a generalised unstructured interstitial pulmonary pattern (8/14), mixed bronchointerstitioalveolar pattern (3/14) and bronchointerstitial pattern with bronchial wall thickening (3/14). Sternal lymphadenopathy was detected on thoracic radiographs in six cats. On CT, features were mixed bronchointerstitioalveolar pattern with ground-glass appearance in six cats, interstitioalveolar with multiple pulmonary nodules in five, interstitial ground-glass infiltrates in three, regional lymph node enlargement in 11 (10 sternal, three cranial mediastinal and three tracheobronchial lymph nodes) and subpleural thickening in four. None of the thoracic radiographs revealed subpleural thickening. In all cases, pulmonary vessels were normal in terms of size, shape and attenuation on both radiography and CT. Pulmonary hypertension and cardiac abnormalities were not observed in any cat during echocardiography. Conclusions and relevance CT provided a more thorough characterisation of pulmonary and mediastinal lesions compared with thoracic radiographs in cats naturally infected with A abstrusus. Although feline aelurostrongylosis has been previously associated with histopathological lesions in lung arteries, in this cohort clinical evidence of pulmonary hypertension was not documented.
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Verma, Abhishek, Stuti Verma, Anushikha Dhankhar, Nitin Kumar Moral, Nidhi Nagar, and Ajeet Singh Bhadoria. "Predicting the Risk of Inferior Alveolar Nerve Injury in Impacted Lower Third Molars Using Panoramic Radiography and Cone Beam Computed Tomography." Journal of Evolution of Medical and Dental Sciences 10, no. 34 (2021): 2910–14. http://dx.doi.org/10.14260/jemds/2021/593.

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BACKGROUND A serious complication of surgical removal of impacted lower third molars is inferior alveolar nerve (IAN) injury. Evaluation of radiographic factors to predict IAN injury using CT and panoramic radiography includes root morphology assessment, follicular sac size, mandibular bone density, inferior alveolar nerve and vessels, condition of the overlying tissues, relation of the impacted tooth with the body and ramus of the mandible and the adjacent teeth. This study was done to evaluate the radiological features of the impacted lower mandibular teeth and their relationship with IAN through panoramic radiography and CT and to assess the most predictable radiological criteria for inferior alveolar nerve injury in impacted third molar surgery. METHODS All the patients indicated for lower third molar extraction were included in the study and pre-operative conventional panoramic radiographs (Planmeca Proline PM 2002 CC, Helsinki, Finland) and CBCT (Kodak CBCT) were taken. Any post-operative nerve injuries detected were followed up after 15 days or 1 month. Fisher’s exact test was done to find the association between the outcome variable and explanatory variables. RESULTS Only 11.4 % (N = 4) of all participants had IAN injury following surgical disimpaction. All the participants with IAN injury showed narrowing of the canal on their preoperative panoramic radiographs and presence of nerve approximation with the tooth in cone beam computed tomography (CBCT) reports (P < 0.05). CONCLUSIONS A statistically significant association exists between IAN injury and nerve exposure, radiographic signs of nerve involvement for panoramic radiograph, level of third molar impaction, and nerve approximation in CBCT. KEY WORDS Inferior Alveolar Nerve Injury, Lower Third Molar Impaction, Panoramic Radiography, CBCT
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Murphy, Micheal, Richard Hodgson, Peter L. Harris, Richard G. McWilliams, David E. Hartley, and Michael M. D. Lawrence-Brown. "Plain Radiographic Surveillance of Abdominal Aortic Stent-Grafts: The Liverpool/Perth Protocol." Journal of Endovascular Therapy 10, no. 5 (2003): 911–12. http://dx.doi.org/10.1177/152660280301000510.

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Purpose: To present a protocol for plain radiographic surveillance of abdominal aortic stent-grafts that addresses the main variables in need of standardization: (1) patient position, (2) radiographic centering point, and (3) focus-to-film distance. Technique: Our policy is to perform baseline anteroposterior and lateral films following endoluminal grafting and repeat the studies annually. These are the most important films to assess migration and component separation; supplementary right and left posterior oblique radiographs may help identify wireform fractures. It is best to perform radiography before computed tomography if both tests are scheduled for the same day, as excretion of intravenous contrast opacifies the renal collecting systems and interferes with radiographic analysis. Conclusions: Evaluation of the radiographs depends on the design of the stent-graft, so it is important to understand graft construction and the position of the radiopaque markers to best assess changes on follow-up films.
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Reddy, Michael S., and I.-Chung Wang. "Radiographic Determinants of Implant Performance." Advances in Dental Research 13, no. 1 (1999): 136–45. http://dx.doi.org/10.1177/08959374990130010301.

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This paper reviews and compares the strengths and weaknesses of radiographic techniques including periapical, occlusal, panoramic, direct digital, motion tomography, and computed tomography. Practical considerations for each method, including availability and accessibility, are discussed. To date, digital subtraction radiography is the most versatile and sensitive method for measuring boss loss. It can detect both bone height and bone mass changes on root-form or blade-form dental implants. Criteria for implant success have changed substantially over the past two decades. In clinical trials of dental implants, the outcomes require certain radiographic analyses to address the hypothesis or clinical question adequately. Radiographic methods best suited to the objective assessment of implant performance and hypothesis were reviewed.
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Innes, J. F., F. McConnell, M. J. Guilliard, et al. "Observer variation in the evaluation and classification of severe central tarsal bone fractures in racing Greyhounds." Veterinary and Comparative Orthopaedics and Traumatology 24, no. 03 (2011): 215–22. http://dx.doi.org/10.3415/vcot-10-06-0085.

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SummaryObjectives: To determine observer agreement on radiographic evaluation of central tarsal bone (CTB) fractures and compare this with evaluation of the same fractures using computed tomography (CT).Methods: Radiographs and CT scans were obtained of the right tarsi from limbs of Greyhounds euthanatized after sustaining severe CTB fracture during racing. Four observers described and classified each fracture. Inter- and intra-observer agreements were calculated.Results: Inter-observer agreement was higher for assessment of fractures using CT. Several fractures assessed by radiography were mis-classified as a less severe type. Intra-observer agreement for assessment and classification of CTB fractures via radiography versus CT was variable. Overall agreement among all four observers was higher for CT than radiography. Additionally, when identifying fractures of the adjacent tarsal bones, observer agreement was higher for CT than radiography.Clinical significance: Computed tomography improved observer ability to correctly evaluate CTB fracture and detect the degree of displacement and extent of any comminution. Identification of fractures of adjacent tarsal bones was also improved when tarsi were assessed using CT. These data suggest that treatment decisions based solely on radiographic assessment of CTB fractures may not produce the expected outcome.
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Beltrán, Jorge A., Roberto A. León-Manco, and Maria Eugenia Guerrero. "Comparison of the diagnostic accuracy of cone beam computed tomography and three intraoral radiographic systems in the diagnosis of carious lesions in vitro." Journal of Oral Research 9, no. 6 (2020): 466–73. http://dx.doi.org/10.17126/joralres.2020.091.

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Objective: The objective of the study was to compare the diagnostic accuracy of cone beam computed tomography and three intraoral radiographic systems in the detection of in vitro caries lesions. Material and Methods: One hundred teeth (46 molars and 54 premolars) were evaluated, including 176 proximal surfaces and 90 occlusal surfaces, with or without dental caries lesions. Digital images of all teeth were obtained using specific intraoral radiographs, VistaScan DürrDental®phosphor-plate radiography, XIOS XG Sirona® digital sensor radiography, and CBCT I-CATTM. Observers evaluated the images for the detection of caries lesions. The teeth were clinically sectioned and stereomicroscopy served as a validation tool. The relationship of sensitivity and specificity between all systems was determined through the ROC curve using Az values. Results: The values of the area under the curve (Az) selected for the CBCT I-CATTM system were 0.89 (0.84-0.93), for conventional radiography 0.71 (0.66-0.76), digital sensor radiography 0.74 (0.70-0.78) and digital radiography with phosphor-plates 0.73 (0.69-0.77). Statistically significant differences were found between the CBCT I-CATTM system and intraoral radiographic systems (p<0.01). The sensitivity and specificity values for the CBCT I-CATTM were 0.84 and 0.93 respectively. Conclusion: CBCT has a high sensitivity and specificity compared to intraoral radiographic systems for the diagnosis of dental caries lesions in vitro.
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Dissertations / Theses on the topic "Tomography, radiographic"

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Polinsky, Adam S. "Evaluation and Comparison of Periapical Healing Using Periapical Films and Cone Beam Computed Tomography: Post-Treatment Follow Up." VCU Scholars Compass, 2019. https://scholarscompass.vcu.edu/etd/5767.

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Purpose: The purpose of this study was to assess the radiographic changes in periapical status and analysis of healing determined using periapical radiographs (PA) versus cone beam computed tomography (CBCT) pre-operatively and at 3-64 months following endodontic treatment. Methods: Pre/post treatment radiograph and CBCT scans of patients who had NSRCT, NSReTx, or SRCT from July 2011-December 2018 at VCU Graduate Endodontic clinic were included in this study. Volumetric and linear measurements of periapical lesions on initial and recall PA and CBCT images were performed using three calibrated examiners. Changes and differences in the estimated area from PA to CBCT were compared using the Wilcoxon signed-rank test. McNemar’s chi-squared test was used to determine agreement in the proportion of lesions that were absent (0x0) between the PA and corresponding view of CBCT. This data was used to calculate the sensitivity, specificity, positive predictive value (PPV), and negative predicative value (NPV). Results: A total of 51 patients with a median healing time of 13 months were included in the analysis. Significant healing was observed on both PA and CBCT images (p-value Conclusion: Assessment using CBCT revealed a lower healing rate for all treatment categories compared with periapical radiographs. CBCT was more likely to detect the presence of a PARL, whereas a periapical radiograph would be less sensitive to detection of a PARL. Significant healing cannot be detected at an earlier point in time with PA radiographs or CBCT.
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Barallat, Sendagorta Lucía. "Histologic and radiographic evaluation of different bone grafts in ridge preservation procedures." Doctoral thesis, Universitat Internacional de Catalunya, 2016. http://hdl.handle.net/10803/392633.

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The main goal of this PhD project was to better understand how different types of bone grafts behave in ridge preservation procedures. There is clear evidence that, after tooth removal, a healing process takes place in which the blood clot that fills the socket is gradually substituted with new bone. This process is accompanied by a reduction in height and width of the alveolar ridge. These events may result in limited bone availability, which may compromise an adequate implant placement in order to replace the missing teeth. For this reason, the insertion of different graft materials into the extraction socket has been reported. From the available evidence, it may be concluded that ridge preservation procedures do not completely prevent, but minimize loss of horizontal and vertical ridge alterations. From an histological point of view, several studies have analyzed the histological composition of previously preserved areas in order to determine the amount of vital bone formed. Since the additional benefits of different graft materials in terms of newly formed bone compared to natural healing of the extraction socket was still unknown, we conducted a systematic review in order to answer this question. Calcium sulfate, magnesium enriched hydroxyapatite (MHA) and porcine-derived bone grafts resulted in a significant greater amount of newly formed bone than natural healing sites. Studies evaluating allografts, autologous bone and bioactive glass showed no statistical significant differences between treatment groups. Due to the great variability of the included studies, no firm conclusions could be drawn. Demineralized bovine bone mineral (DBBM) and demineralized bone bovine mineral embedded in 10% collagen matrix (DBBM-C) have been widely used in regenerative therapies and particularly in ridge preservation procedures. However, the possible differences between both grafting materials had not previously been analysed. Therefore, a double blind randomized clinical trial comparing DBBM and DBBM-C in ridge preservation procedures was conducted. A reduction in height and width was observed 5 months after tooth extraction in sites preserved either with DBBM or DBBM-C, but no significant differences were encountered between treatment groups. On the other hand, the histomorphometric analysis resulted in a similar composition in terms of new bone formation, non-mineralized connective tissue and residual graft particles in both treatment groups. From the above mentioned research projects it may be concluded that there is no consensus on which graft material offers the best outcomes from an histological point of view. More specifically, the results of the randomized clinical trial suggest that there are no statistically significant differences between DBBM and DBBM-C neither in height and width reduction of the alveolar ridge nor in their histological composition after a healing period of 5 months.<br>El objetivo final de este proyecto de tesis doctoral era conocer mejor el comportamiento de distintos materiales de injerto en la técnica de preservación alveolar. Hay evidencia de que, después de la extracción dental, comienza un proceso de cicatrización durante el cual el coágulo sanguíneo es progresivamente reemplazado por hueso nuevo. Además, se produce una reducción en altura y anchura de la cresta alveolar, que puede a su vez dar lugar a una disponibilidad ósea limitada pudiendo comprometer la posterior colocación de implantes. Por este motivo, se ha propuesto la introducción de distintos materiales de injerto en el alveolo postextracción. La literatura científica sugiere que los procedimientos de preservación alveolar minimizan estas alteraciones dimensionales de la cresta en sentido horizontal y vertical . Desde un punto de vista histológico, múltiples estudios han evaluado la composición histológica de áreas donde previamente se había realizado una preservación alveolar para determinar la cantidad y calidad del hueso nuevo formado. Como el beneficio adicional a nivel histológico de la preservación alveolar con distintos materiales de injerto respecto a la cicatrización natural del alveolo postextracción no se conocía, realizamos una revisión sistemática para responder esta cuestión. El sulfato de calcio, la hidroxiapatita enriquecida con magnesio (MHA) y los xenoinjertos de origen porcino resultaron en un porcentaje de hueso nuevo formado significativamente mayor que las áreas control. Otros estudios que utilizaron autoinjertos, aloinjertos o biovidrios no observaron diferencias significativas entre grupos. Sin embargo, debido a la gran variabilidad de los estudios incluídos, no se pudieron sacar conclusiones definitivas. El injerto bovino desproteneizado (DBBM) y el injerto bovino desproteneizado en una matriz de colágeno (DBBM-C) han sido ampliamente utilizados en terapias regenerativas y, particularmente, en preservación alveolar aunque aún no se han analizado las posibles diferencias entre ambos materiales. Por eso se realizó un ensayo clínico randomizado a doble ciego comparando DBBM y DBBM-C en preservación alveolar. Cinco meses después de la extracción, se observó una reducción en anchura y altura de la cresta alveolar en ambos grupos de tratamiento, pero no se encontraron diferencias estadísticamente significativas entre ambos. Por otro lado, el análisis histomorfométrico demostró una composición histológica similar en áreas tratadas con DBBM y áreas tratadas con DBBM-C. De los estudios mencionados previamente, se puede concluir que no hay un consenso sobre qué material de injerto ofrece los mejores resultados en cuanto a composición histológica. Particularmente, los resultados del ensayo clínico randomizado sugieren que no existen diferencias estadísticamente significativas entre DBBM y DBBM-C en cuanto a cambios dimensionales ni en cuanto a composición histológica 5 meses después de realizar la preservación alveolar.
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Li, Geng, and 李耕. "Magnetic resonance, computed tomographic, radiographic and anatomical correlation of dimensions of the metacarpal and proximal phalanx ofthe little finger." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1999. http://hub.hku.hk/bib/B31969641.

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Abofatira, Mohamed Farag. "A radiographic analysis of the anterior palate as a donor site for bone harvesting." University of the Western Cape, 2015. http://hdl.handle.net/11394/5040.

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Magister Scientiae Dentium - MSc(Dent)<br>Autologous bone grafting in conjunction with dental implant therapy is a well-accepted procedure in oral and maxillofacial rehabilitation. A variety of intraoral donor sites, such as the mandibular symphysis, the mandibular ramus and the maxillary tuberosity have been used in oral and maxillofacial reconstruction. However these sites are associated with complications. In order to reduce these complications, the anterior palate has been proposed as a potential donor site. However, the scientific literature in this regard is sparse, and larger studies are required to investigate the clinical potential of this proposed site. Aim: To determine the volume and density of available bone in the anterior palate that may be used for bone harvesting using cone-beam computed tomography (CBCT) in a select South African population. Materials and methods: One hundred previously acquired CBCT scans taken at the Diagnostic and Radiology Department of Tygerberg Oral Health Centre were analyzed for the required data. These were all acquired from a single CBCT machine (Newtom VGI®, Verona, Italy). The study sample included 52 females and 48 males ranging from ages 20 years to 80 years. The CBCT scans were divided into 3 different age groups. The first age group was between the ages of 20 and 39 years, the second age group was from 40 to 59 years and the third age group was ≥ 60 years. The volume and density of the anterior palate of the different age groups were analyzed using specific criterion. CBCT specific software (Simplant Pro Crystal®) Dentsply implants, Mannheim, Germany was used to standardize the data collection. All data was stored in a Microsoft Excel spreadsheet (Microsoft Corporation, Washington, USA). Results: The mean volume of the anterior palate in this study was 2.11 ± 0.55 cm3, with a minimum volume of 1.04 cm3 and a maximum volume of 3.82 cm3. There was no significant difference in the volume and density of the anterior palate between different age groups and no significant difference in the volume between males and females (p value = 0.227). Conclusions: The anterior palate affords a considerable amount of bone volume which is similar or even more than other intraoral donor sites. The anterior palate is a potential donor site for bone harvesting and CBCT may be regarded as an ideal tool to analyze the amount of bone available for harvesting.
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Adam, Ryan J. "Radiographic assessment of lung anatomy, physiology, and disease in a porcine model of cystic fibrosis and people with cystic fibrosis." Diss., University of Iowa, 2017. https://ir.uiowa.edu/etd/5692.

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Despite affecting many organ systems, the leading cause of morbidity and mortality in the cystic fibrosis (CF) population is lung disease. For the current studies we investigated elements of CF lung disease in a porcine model of CF and in people with CF. Our primary analysis tool was chest computed tomography (CT). To investigate early CF lung disease we examined three week old CF and non-CF pigs. We found three week old CF pigs to have large, irregular tracheal smooth muscle bundles, airways of reduced size, airways of irregular shape, and airways of abnormal distensibility. Three week old CF pig lung parenchyma was more heterogenous in density than three week non-CF pigs, especially in the right cephalad lung. The degree of lung tissue heterogeneity in CF pigs correlated with the degree of lung infection. Three week old CF pigs also had significantly more air trapping upon exhalation, evidence of airflow obstruction, than non-CF pigs. The degree of air trapping correlated with the degree of mucus accumulation in the airways. These data show that CF pigs spontaneously develop hallmark features of CF lung disease within weeks of birth, and that abnormal airway growth and development in CF may contribute to lung disease. This study helped set the foundation for future comparative studies involving CF therapeutics, for example, antibiotics and mucolytics. In adults with CF we performed a before drug, after drug study. The drug was ivacaftor, and it restores the basic underlying defect in a subset of people with CF: impaired function of a particular anion channel. We hypothesized that abnormal airway smooth muscle behavior in people with CF, known as “CF asthma,” is, in part, a primary pathogenic mechanism of CF lung disease. We tested our hypothesis by assaying smooth muscle tone before and after administration of ivacaftor. We limited the time duration to two days. We reasoned two days was long enough for ivacaftor to become effective, but not long enough to reverse long standing lung infection and inflammation which could affect smooth muscle function independently. The implication being, that observed changes would be directly due to restoration of the CF defect. We found evidence suggesting relaxation of airway and vascular smooth muscle tone. And, the change in airway smooth muscle tone correlated with the change in vascular smooth muscle tone. These data suggest that impaired smooth muscle function is a primary element of CF lung disease. Many of the people in our two day ivacaftor study returned for follow up after one year of ivacaftor therapy. We hypothesized that radiographic features of lung disease would improve following one year of ivacaftor therapy. We observed no change in lung volume upon inspiration, but a reduction in expiratory lung volume, approximately half of which occurred within two days. Our airway measurements were confounded by errors in scan reconstruction, however, other published studies report airway wall thinning over long term ivacaftor administration. Taken together, these studies of pigs with CF and people with CF, help us understand this disease.
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Jamjoom, Faris Zainalabedeen. "Positional Accuracy of Prosthetic Treatment Plan Incorporation Into Cone-beam Computed Tomography Scans Using Surface Scan Superimposition." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1498241824233391.

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Santos, Gisele Junqueira dos. "Influência do escore corporal sobre parâmetros cardiovasculares em Papagaios-verdadeiros (Amazona aestiva, Linnaeus, 1758) mantidos em cativeiro." Botucatu, 2019. http://hdl.handle.net/11449/181249.

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Orientador: Alessandra Melchert<br>Resumo: O presente estudo teve como objetivo avaliar a influência do escore corporal sobre parâmetros cardiovasculares (ecocardiográficos, eletrocardiográficos, tomográficos e radiográficos) em papagaios verdadeiros (Amazona aestiva) anestesiados e mantidos em cativeiro. Foram utilizadas 35 aves, sem distinção de sexo, agrupadas de acordo com a condição nutricional: Grupo Magro (n=11); Grupo Ideal (n=14); Grupo Obeso (n=10). Ao exame ecocardiográfico os papagaios obesos apresentaram menor o comprimento diastólico do VD em relação ao grupo magro. Os valores da fração de encurtamento (FE) do eixo transverso do ventrículo esquerdo (VE), FE do eixo longitudinal do VE e FE do eixo longitudinal do ventrículo direito (VD), para os papagaios obesos, apesar de não significativos, foram bastante inferiores aos dos animais em escore magro e normal. Na avaliação radiográfica e tomográfica, comparando as medidas dos diferentes grupos, não foram observadas diferenças significativas. No exame eletrocardiográfico foram determinados: frequência cardíaca (FC), ritmo cardíaco, duração e amplitude da onda P, duração do intervalo PR e complexo QRS (padrão rS), duração e amplitude da onda R, duração do intervalo RR e intervalo QT e QT corrigido (QTC), duração e amplitude da onda T, não se observando diferença significativa entre os grupos estudados. Concluiu-se que, assim como em mamíferos, alterações da condição nutricional em papagaios-verdadeiros (A. aestiva) acarretam em disfunções cardiovasculares, d... (Resumo completo, clicar acesso eletrônico abaixo)<br>Abstract: The aim of this study was to evaluate the influence of the body condition score (BCS) on cardiovascular parameters (echocardiographic, electrocardiographic, tomographic and radiographic) in parrots (Amazona aestiva) anesthetized and kept in captivity. Thirty-five birds were evaluated, regardless of gender, grouped according to the nutritional condition: Lean group (n = 11); Ideal group (n = 14); Obese group (n = 10). On echocardiographic examination, obese parrots presented lower diastolic length of the right ventricle (RV) than the lean group. The fractional shortening (FS) values of the left ventricle (LV) in transverse axis, LV FS and RV FS in longitudinal axis for the obese parrots, although not significant, were lower than those of the lean and normal animals. In the radiographic and tomographic evaluation, comparing the measurements of the different groups, no significant differences were observed. Cardiac frequency (HR), heart rate, duration and amplitude of the P wave, duration of the PR interval and QRS complex (rS pattern), duration and amplitude of the R wave, duration of the RR interval, QT and correct QT (QTc) intervals, duration and amplitude of the T wave were determined in the electrocardiographic exam. No significant difference was observed between the studied groups. It was concluded that, as in mammals, changes in nutritional status in parrots (A. aestiva) lead to cardiovascular dysfunctions, however, detected only on echocardiographic examination. The prop... (Complete abstract click electronic access below)<br>Doutor
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Malusek, Alexandr. "Calculation of scatter in cone beam CT : Steps towards a virtual tomograph." Doctoral thesis, Linköping : Department of Medical and Health Sciences, Linköping University, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-11275.

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Vaz, Sergio Lins de Azevedo 1984. "Detection of periimplant fenestration and dehiscence using CBCT - an in vitro study = Diagnóstico tomográfico de fenestração e deiscência peri-implantar - estudo in vitro." [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/289080.

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Orientador: Francisco Haiter Neto<br>Tese (Doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba<br>Made available in DSpace on 2018-08-22T00:06:43Z (GMT). No. of bitstreams: 1 Vaz_SergioLinsdeAzevedo_D.pdf: 2097588 bytes, checksum: 48e378674d749eb9b8ea2a05042e21a4 (MD5) Previous issue date: 2013<br>Resumo: O presente estudo se propôs a avaliar a influência do tamanho de voxel e giro de escaneamento na detecção tomográfica de fenestração e deiscência peri-implantar, além do uso de filtros de imagem na detecção da deiscência peri-implantar. Em fragmentos de costelas bovinas, foi criado defeitos que simulariam fenestração e deiscência peri-implantar após a instalação de 100 implantes de titânio. As imagens foram adquiridas no tomógrafo computadorizado de feixe cônico i-CAT Next Generation, empregando FOV de 8 x 8 cm e três protocolos: A- voxel de 0,2 mm, giro de escaneamento de 180°; B- voxel de 0,2 mm, giro de 360°; C- voxel de 0,12 mm, giro de 360°. Cinco filtros do programa XoranCat foram testados: Angio Sharpen High 5x5, Shadow, Sharpen 3×3, Sharpen Mild e Smooth. Três cirurgiões-dentistas radiologistas identificaram a presença ou ausência dos defeitos. Curvas ROC foram criadas e os valores de área sob a curva (Az) comparados utilizando a Análise de Variância (ANOVA), com teste post hoc de Bonferroni (alfa de 5%). O teste de McNemar foi utilizado para comparar imagens (originais e com filtros) versus padrão ouro, bem como imagens originais versus imagens com filtros. Os resultados mostraram diferenças estatisticamente significantes entre os valores de Az dos protocolos B e C em relação ao protocolo A (p < 0,01) para deiscência. Houve diferenças estatisticamente significantes (p < 0,01) entre as imagens originais e o filtro Shadow em relação ao padrão ouro, bem como entre todos os filtros testados em relação às imagens originais. Concluiu-se que os tamanhos de voxel testados não influenciaram no diagnóstico de ambos os defeitos, enquanto que o giro de escaneamento completo (360°) foi melhor para deiscência. Diante da maior dificuldade no diagnóstico tomográfico de deiscência peri-implantar, o uso dos filtros de imagem testados é aconselhado, com exceção do filtro Shadow<br>Abstract: This study set out an assessment of the effects of two voxel sizes and scan modes of cone-beam computed tomography (CBCT) in periimplant fenestration and dehiscence detection. It also aimed to investigate whether CBCT filters would enhance the diagnosis of periimplant dehiscence. One hundred titanium implants were placed in bovine ribs in which periimplant fenestration and dehiscence were simulated. The images were acquired using the i-CAT Next Generation CBCT unit, with a FOV of 8 x 8 cm and the following protocols: A- 0.2 mm voxel size half-scan (180°); B- 0.2 mm voxel size full-scan (360°); and C- 0.12 mm voxel size full-scan (360°). Five filters of the XoranCat software were tested: Angio Sharpen High 5x5, Shadow, Sharpen 3×3, Sharpen Mild and Smooth. Three oral radiologists performed a dynamic evaluation of the presence/absence of the defects and ROC curves were created. The values of the area under the curve (Az) were compared with ANOVA and Bonferroni post-hoc test. The significance level was adopted at 5%. The McNemar test was applied to perform two comparisons in order to identify disagreements. All the enhanced and the original images were compared with the gold-standard and the original images were compared to the enhanced ones. The protocol A had significantly lower Az values than those obtained with the protocols B and C (p < 0.01) for dehiscence. The original images and the Shadow filter were statistically different from the gold-standard (p < 0.01). All the enhanced images also had statistically significant differences from the original images (p < 0.01). In conclusion, the voxel sizes did not influence in periimplant fenestration and dehiscence detection but the full-scan (360°) performed better than the half-scan for dehiscence. The use of enhancement CBCT filters for dehiscence detection is advised, with the exception of the Shadow filter<br>Doutorado<br>Radiologia Odontologica<br>Doutor em Radiologia Odontológica
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Knuppel, Julie M. "Correlation of Neurologic Status As Evaluated By Neurologic Examination And Brainstem Auditory Evoked Response Test With Computed Tomographic And Radiographic Morphometric Analysis Of The Caudal Skull In Cavalier King Charles Spaniels." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1243866074.

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Books on the topic "Tomography, radiographic"

1

Dynamic computer tomography: Basic principles and clinical applications. Springer-Verlag, 1985.

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R, Lotz Preston, ed. Correlative neuroradiology: Intracranial radiographic analysis with computed tomography, angiography, and magnetic resonance imaging. 2nd ed. Wiley, 1985.

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Heismann, Björn J. Spectral CT imaging. SPIE Press, 2012.

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Hussein, Esam M. A. Computer Radiation Imaging: Physics and Mathematics of the Forward and Inverse Problems. Elsevier Science & Technology Books, 2011.

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Veterinary computed tomography. Wiley-Blackwell, 2011.

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Cardiovascular computed tomography. Oxford University Press, 2011.

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Schwarz, Tobias. Veterinary computed tomography. Wiley-Blackwell, 2011.

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1961-, Yoshida Hiroyuki, Cai Wenli, and International Conference on Medical Image Computing and Computer-Assisted Intervention (13th : 2010 : Beijing, China), eds. Virtual colonoscopy and abdominal imaging: Computational challenges and clinical opportunities : second international workshop held in conjunction with MICCAI 2010, Beijing, China, September 20, 2010, revised selected papers. Springer, 2011.

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Sarwar, Mohammad. Computed tomography of congenial brain malformations. W.H. Green, 1985.

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M, Sandler Carl, ed. Computed tomography in trauma. Saunders, 1987.

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Book chapters on the topic "Tomography, radiographic"

1

Dowdell, Lois, and D. M. Wilmot. "Radiographic Tomography." In Pediatric Imaging for the Technologist. Springer New York, 1987. http://dx.doi.org/10.1007/978-1-4612-4690-9_8.

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Sachs, James, and Ken Sauer. "3D Reconstruction from Sparse Radiographic Data." In Discrete Tomography. Birkhäuser Boston, 1999. http://dx.doi.org/10.1007/978-1-4612-1568-4_16.

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Sulcoski, M. F., and J. S. Brenizer. "Computed Neutron Tomography from Real-Time Radiographic Images." In Neutron Radiography. Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3871-7_93.

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Bahk, Yong-Whee. "Dual-Head Planar Pinhole Scintigraphy and Pinhole Single Photon Emission Computed Tomography of Bone." In Combined Scintigraphic and Radiographic Diagnosis of Bone and Joint Diseases. Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/978-3-662-04106-2_17.

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Mallya, Sanjay M. "Radiographic Evaluation of the Alveolar Ridge in Implant Dentistry. Cone Beam Computed Tomography." In Vertical Alveolar Ridge Augmentation in Implant dentistry : A Surgical Manual. John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781119082835.ch05.

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Melsen, Birte, and Michel Dalstra. "Rational Basis for Transitioning from 2D to 3D Radiographic Imaging in Orthodontic Practice and Research." In Cone Beam Computed Tomography in Orthodontics: Indications, Insights, and Innovations. John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118674888.ch4.

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Barton, C. F., and G. Ducros. "Workshop on “Computed Tomography”." In Neutron Radiography. Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3871-7_111.

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Spencer, N. M. "Computerized tomography." In Equipment for Diagnostic Radiography. Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-4930-0_18.

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Kusminarto and Nicholas M. Spyrou. "Imaging with Neutrons in Transmission Tomography." In Neutron Radiography. Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3871-7_89.

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McClellan, Grant C., and David M. Tow. "Neutron Tomography of Damaged Reactor Fuel Assemblies." In Neutron Radiography. Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3871-7_88.

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Conference papers on the topic "Tomography, radiographic"

1

Schreiber, Eric C., and Patrick G. O'Shea. "Radiographic tomography using near-monochromatic gamma rays." In Optical Science, Engineering and Instrumentation '97, edited by Andreas K. Freund, Henry P. Freund, and Malcolm R. Howells. SPIE, 1997. http://dx.doi.org/10.1117/12.293365.

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Sinescu, Cosmin, Meda Lavinia Negrutiu, Ciprian Ionita, et al. "Radiographic, microcomputer tomography, and optical coherence tomography investigations of ceramic interfaces." In Asia Communications and Photonics Conference and Exhibition, edited by Qingming Luo, Frank Chuang, Stefan Haacke, and Chih-Chung Yang. SPIE, 2010. http://dx.doi.org/10.1117/12.890272.

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Sinescu, Cosmin, Meda Lavinia Negrutiu, Ciprian Ionita, et al. "Radiographic, Micro Computer Tomography and Optical Coherence Tomography Investigations of Ceramic Interfaces." In Asia Communications and Photonics Conference and Exhibition. OSA, 2010. http://dx.doi.org/10.1364/acp.2010.79900w.

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Heindel, Theodore J., Terrence C. Jensen, and Joseph N. Gray. "Visualizing Fluid Flows With X-Rays." In ASME/JSME 2007 5th Joint Fluids Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/fedsm2007-37023.

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There are several methods available to visualize fluid flows when one has optical access. However, when optical access is limited to near the boundaries or not available at all, alternative visualization methods are required. This paper will describe flow visualization using an X-ray system that is capable of digital X-ray radiography, digital X-ray stereography, and digital X-ray computed tomography (CT). The unique X-ray flow visualization facility will be briefly described, and then flow visualization of various systems will be shown. Radiographs provide a two-dimensional density map of a three dimensional process or object. Radiographic images of various multiphase flows will be presented. When two X-ray sources and detectors simultaneously acquire images of the same process or object from different orientations, stereographic imaging can be completed; this type of imaging will be demonstrated by trickling water through packed columns and by absorbing water in a porous medium. Finally, local time-averaged phase distributions can be determined from X-ray computed tomography (CT) imaging, and this will be shown by comparing CT images from two different gas-liquid sparged columns.
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Flores, Miguel Angel Neri, Alberto Martinez Villafañe, and Caleb Carreño. "Failure Analysis of Automotive Ultrasonic Parking Sensors." In ISTFA 2016. ASM International, 2016. http://dx.doi.org/10.31399/asm.cp.istfa2016p0237.

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Abstract Automotive ultrasonic parking sensors were analyzed using X- ray computed tomography (XCT or microtomography), in order to determine if there were internal failures generated on the soldering process between copper wires and piezoelectric ceramic on these sensors. This paper reports the use of X-ray radiography and computer image processing for the study of internal defects. By using X-ray tomography technique, pores, cracks, holes, solder balling, insufficient solder, lead related defects, device related defects, and solder bridging may be identified (1-2). When coupled with a real time radiographic detector and image processor, X-ray technology allows instantaneous radiographic imaging and semi-automatic or totally automatic inspection. Analysis was conducted on six produced test samples showing that the application of XCT as a method of quality control of specimens produced by electronic packaging offers a wide range of possibilities to detect defects within materials. There were determined that five sensors contain internal defects on the soldered joints, between the copper wire, and the piezo electric ceramic covered with silver paint, as shown on the computed tomography. Accuracy of XCT method strongly depends on the size of the samples analyzed, but the possibility of obtaining information in 3D nondestructively shows considerable advantages of XCT method over traditional metallographic cross-sectional analysis.
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Gratton, Robert, James Wilson, and Kevin Skuse. "Application of Computed Tomography for the Examination of Pressure Retaining Nuclear Plant Components." In ASME 2017 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/pvp2017-65051.

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Pressure retaining nuclear plant components require high levels of quality assurance to support the rigorous requirements of the modern safety case and the ASME Boiler and Pressure Vessel Code. Part NB-2500 of the ASME BPVC requires 100% volumetric examination of pressure retaining components and attachment welds utilising suitably demonstrated ultrasonic and radiographic examination techniques respectively. The capability of the inspection technique is particularly important for thin-walled components where the typical size of manufacturing defects tend to make up a greater proportion of the wall thickness. Computed Tomography (CT) is a development of conventional radiography and makes use of computer-processed combinations of many X-ray images taken from different angles to produce cross-sectional images of specific areas of a scanned object. This technique can be used to compliment and add strength to the standard volumetric examinations; ie the detection capability for conventional radiography is often dependent on alignment of the source to defect and ultrasonic methods are more suited to targeting planar flaws. Rather than the technical challenges placed on the Non-Destructive Examination (NDE) practitioner, this paper focuses on the benefits of application of CT to thin-walled nuclear plant components from the viewpoint of the nuclear plant component Design Engineer. The CT examples presented in this paper demonstrate reliable detection of voids measuring 4% of thickness including those located at features which are difficult to examine using standard techniques. These CT examinations compliment the standard volumetric inspections and provide high confidence that the component is free of structurally significant defects.
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Heindel, Theodore J., Jeremy L. Hubers, Terrence C. Jensen, Joseph N. Gray, and Alexander C. Striegel. "Using X-Rays for Multiphase Flow Visualization." In ASME 2005 Fluids Engineering Division Summer Meeting. ASMEDC, 2005. http://dx.doi.org/10.1115/fedsm2005-77359.

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Gas-liquid, gas-solid, liquid-solid, and gas-liquid-solid multiphase flows are difficult to visualize, characterize, and quantify because the systems are typically opaque. Invasive or noninvasive measurement methods are typically used for determining internal flow and transport characteristics of these complex flows. The difficulty with invasive methods is that they can alter the internal flow of a multiphase system causing interference with realistic process measurements. X-ray imaging provides one family of noninvasive measurement techniques used extensively for product testing and evaluation of static objects with complex structures. These techniques have been extended to visualize dynamic systems, such as those which characterize multiphase flows. This paper will describe a new X-ray flow visualization facility for large-scale multiphase flows. X-ray radiography and X-ray computed tomography of static and dynamic systems will be used to demonstrate system capabilities. Radiographic images will show bread dough rising, objects falling in a liquid, large bubbles rising in a 32 cm ID column of water, and operation of a 32 cm ID bubble column. X-ray computed tomography of a large static object will demonstrate visualization capabilities. X-ray computed tomography of a multiphase flow in a 32 cm bubble column will show local time-averaged gas holdup values for various operating conditions. Finally, challenges associated with X-ray stereographic imaging to capture time-resolved dynamic events will be outlined.
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Sinescu, Cosmin, Meda Lavinia Negrutiu, Ciprian Ionita, et al. "Biomedical implications of dental-ceramic defects investigated by numerical simulation, radiographic, microcomputer tomography, and time-domain optical coherence tomography." In SPIE Optical Systems Design, edited by Gérard Berginc. SPIE, 2011. http://dx.doi.org/10.1117/12.896716.

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"Automatic Detection and Classification of Dental Restorations in Panoramic Radiographs." In InSITE 2019: Informing Science + IT Education Conferences: Jerusalem. Informing Science Institute, 2019. http://dx.doi.org/10.28945/4307.

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[This Proceedings paper was revised and published in the 2019 issue of the journal Issues in Informing Science and Information Technology, Volume 16] Aim/Purpose: The aim of this study was to develop a prototype of an information-generating computer tool designed to automatically map the dental restorations in a panoramic radiograph. Background: A panoramic radiograph is an external dental radiograph of the oro-maxillofacial region, obtained with minimal discomfort and significantly lower radiation dose compared to full mouth intra-oral radiographs or cone-beam computed tomography (CBCT) imaging. Currently, however, a radiologic informative report is not regularly designed for a panoramic radiograph, and the referring doctor needs to interpret the panoramic radiograph manually, according to his own judgment. Methodology: An algorithm, based on techniques of computer vision and machine learning, was developed to automatically detect and classify dental restorations in a panoramic radiograph, such as fillings, crowns, root canal treatments and implants. An experienced dentist evaluated 63 panoramic anonymized images and marked on them, manually, 316 various restorations. The images were automatically cropped to obtain a region of interest (ROI) containing only the upper and lower alveolar ridges. The algorithm automatically segmented the restorations using a local adaptive threshold. In order to improve detection of the dental restorations, morphological operations such as opening, closing and hole-filling were employed. Since each restoration is characterized by a unique shape and unique gray level distribution, 20 numerical features describing the contour and the texture were extracted in order to classify the restorations. Twenty-two different machine learning models were evaluated, using a cross-validation approach, to automatically classify the dental restorations into 9 categories. Contribution: The computer tool will provide automatic detection and classification of dental restorations, as an initial step toward automatic detection of oral pathologies in a panoramic radiograph. The use of this algorithm will aid in generating a radiologic report which includes all the information required to improve patient management and treatment outcome. Findings: The automatic cropping of the ROI in the panoramic radiographs, in order to include only the alveolar ridges, was successful in 97% of the cases. The developed algorithm for detection and classification of the dental restorations correctly detected 95% of the restorations. ‘Weighted k-NN’ was the machine-learning model that yielded the best classification rate of the dental restorations - 92%. Impact on Society: Information that will be extracted automatically from the panoramic image will provide a reliable, reproducible radiographic report, currently unavailable, which will assist the clinician as well as improve patients’ reliance on the diagnosis. Future Research: The algorithm for automatic detection and classification of dental restorations in panoramic imaging must be trained on a larger dataset to improve the results. This algorithm will then be used as a preliminary stage for automatically detecting incidental oral pathologies exhibited in the panoramic images.
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Pillers, Roy A., Timothy B. Morgan, Theodore J. Heindel, and Douglas Estanga. "X-Ray Flow Visualization of Cyclopentane Hydrate Formation." In ASME-JSME-KSME 2019 8th Joint Fluids Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/ajkfluids2019-5091.

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Abstract Natural gas hydrates form under high pressure and low-temperature environments common in deepwater off-shore petroleum production operations. Once hydrates form, they can agglomerate and deposit resulting in solid plugs within the piping system, which could require extensive downtime for remediation and recommission of the systems. Hydrate plug formation is difficult to characterize because of the challenging environments in which they form, the lack of instrumentation for such environments, and the fast reaction time compared to other blocking mechanisms. This study explores the use of X-ray flow visualization, including X-ray radiography and X-ray computed tomography, to help characterize hydrate formation in a laboratory setting. A structure II hydrate was formed in a concentric cylinder mixing tank where a mixture of distilled water and cyclopentane was stirred in the inner tank while the outer tank was cooled. As the tank cooled, the distilled water-cyclopentane mixture converted to hydrate, which was captured with X-ray radiographic videos. Once formed, X-ray computed tomography images were acquired to gather 3D reconstructed images of the hydrate with and without liquid present in the mixing tank. It was shown that X-ray imaging could provide a qualitative assessment of hydrate formation. Quantitative measures were challenging because of the limited contrast between the hydrate and liquid region.
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Reports on the topic "Tomography, radiographic"

1

Gibbs, K. N., and J. D. Jones. X-ray Computed Tomography and Stereo-Radiographic Inspection Results of the Office of Emergency Response (NA-42) Test Object. Office of Scientific and Technical Information (OSTI), 2005. http://dx.doi.org/10.2172/881329.

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Back, N., D. Schneberk, C. McMillan, S. Azevedo, and M. Gorvad. Research on computed tomography reconstructions from one or two radiographs: A report and the application to FXR radiography. Office of Scientific and Technical Information (OSTI), 1995. http://dx.doi.org/10.2172/74119.

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Tim Roney, Bob Pink, Karen Wendt, Robert Seifert, and Mike Smith. Digital Radiography and Computed Tomography (DRCT) Product Improvement Plan (PIP). Office of Scientific and Technical Information (OSTI), 2010. http://dx.doi.org/10.2172/1000539.

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Tim Roney, Robert Seifert, Bob Pink, and Mike Smith. Digital Radiography and Computed Tomography Project -- Fully Integrated Linear Detector ArrayStatus Report. Office of Scientific and Technical Information (OSTI), 2011. http://dx.doi.org/10.2172/1035898.

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Aufderheide, M., H. Martz, and M. Curtin. Design of Mega-Voltage X-ray Digital Radiography and Computed Tomography Performance Phantoms. Office of Scientific and Technical Information (OSTI), 2009. http://dx.doi.org/10.2172/990412.

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Green, William H. Digital Radiography and X-ray Computed Tomography Slice Inspection of an Aluminum Truss Section. Defense Technical Information Center, 2011. http://dx.doi.org/10.21236/ada551774.

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Portable Digital Radiography and Computed Tomography Manual. Office of Scientific and Technical Information (OSTI), 2007. http://dx.doi.org/10.2172/924518.

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