Relevant bibliographies by topics / Cone beam computer tomography CBCT

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Academic literature on the topic 'Cone beam computer tomography CBCT'

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Published: 9 March 2023

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Journal articles on the topic "Cone beam computer tomography CBCT"

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Kailash, Sahithya. "CBCT – Cone Beam Computed Tomography." Journal of Academy of Dental Education 1, no. 1 (June 8, 2014): 9. http://dx.doi.org/10.15423/jade/2014/v1i1/44607.

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Abdelkarim, Ahmad. "Cone-Beam Computed Tomography in Orthodontics." Dentistry Journal 7, no. 3 (September 2, 2019): 89. http://dx.doi.org/10.3390/dj7030089.

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Unlike patients receiving implants or endodontic treatment, most orthodontic patients are children who are particularly sensitive to ionizing radiation. Cone-beam computed tomography (CBCT) carries risks and benefits in orthodontics. The principal risks and limitations include ionizing radiation, the presence of artifacts, higher cost, limited accessibility, and the need for additional training. However, this imaging modality has several recognized indications in orthodontics, such as the assessment of impacted and ectopic teeth, assessment of pharyngeal airway, assessment of mini-implant sites, evaluation of craniofacial abnormalities, evaluation of sinus anatomy or pathology, evaluation of root resorption, evaluation of the cortical bone plate, and orthognathic surgery planning and evaluation. CBCT is particularly justified when it brings a benefit to the patient or changes the outcome of the treatment when compared with conventional imaging techniques. Therefore, CBCT should be considered for clinical orthodontics for selected patients. Prescription of CBCT requires judicious and sound clinical judgment. The central question of this narrative review article is: when does CBCT add value to the practice of orthodontics? To answer this question, this article presents discussion on radiation dosage of CBCT and other imaging techniques used in orthodontics, limitations of CBCT in orthodontics, justifying the use of CBCT in orthodontics, and the benefits and evidence-based indications of CBCT in orthodontics. This review summarizes the central themes and topics in the literature regarding CBCT in orthodontics and presents ten orthodontic cases in which CBCT proved to be valuable.
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Kailash, Sahithya. "CBCT's Cone Beam Computed Tomography." Journal of Academy of Dental Education 1, no. 1 (January 8, 2014): 9. http://dx.doi.org/10.18311/jade/2014/2423.

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Dental X- Rays are important for diagnosing and treating patients by helping to detect oral health issues when they can't be detected by visual or physical examination alone. Dental X-Ray take a much closer look and provide valuable information in the area of interest. Though 2 Dimensional X-Ray and Panoramic radiography can predict diagnosis in number of clinical cases, certain situations demand multiplanar imaging, one such technology is CBCT. CBCT is a specialised 3Dimensional Craniofacial imaging in which 3 Dimensional reconstruction is possible. The final reconstructed image produced, reveals multilayer images in 3 orthogonal planes (coronal, sagittal and transverse) This article focuses on CBCT and its applications in various fields of dentistry.
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Durack, Conor, and Shanon Patel. "Cone beam computed tomography in endodontics." Brazilian Dental Journal 23, no. 3 (2012): 179–91. http://dx.doi.org/10.1590/s0103-64402012000300001.

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Cone beam computed tomography (CBCT) is a contemporary, radiological imaging system designed specifically for use on the maxillo-facial skeleton. The system overcomes many of the limitations of conventional radiography by producing undistorted, three-dimensional images of the area under examination. These properties make this form of imaging particularly suitable for use in endodontics. The clinician can obtain an enhanced appreciation of the anatomy being assessed, leading to an improvement in the detection of endodontic disease and resulting in more effective treatment planning. In addition, CBCT operates with a significantly lower effective radiation dose when compared with conventional computed tomography (CT). The purpose of this paper is to review the current literature relating to the limitations and potential applications of CBCT in endodontic practice.
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Campbell, Faith, Laura Timms, Chris Deery, and Nicholas Drage. "Cone beam computed tomography (CBCT) in paediatric dentistry." Dental Update 49, no. 2 (February 2, 2022): 153–58. http://dx.doi.org/10.12968/denu.2022.49.2.153.

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Cone beam computed tomography (CBCT) is becoming increasingly available since its introduction in the late 1990s. The technique provides low-dose high-resolution images of the teeth and jaws. This article discusses the clinical applications of CBCT in children. CBCT is most commonly used in children for localization of teeth and the assessment of root resorption. CBCT can offer an advantage over conventional imaging in selected cases. The decision to image using CBCT should be judged for each individual, and should impact on management and outcome. CPD/Clinical Relevance: CBCT affords low-dose, high-resolution imaging that can be used in appropriately selected paediatric cases.
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Baqain, Zaid, and Abeer Al Hadidi. "Cone beam computed tomography: Rejuvenating dentistry." Faculty Dental Journal 7, no. 2 (April 2016): 74–77. http://dx.doi.org/10.1308/rcsfdj.2016.74.

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Dental cone beam computed tomography (CBCT) is the three-dimensional imaging of choice in modern dentistry. In the developed world, guidelines have been published on the use of CBCT in dentistry, largely in response to the risks associated with ionising radiation exposure. However, the availability of different models on the market at affordable prices has made this machine an integral part of the contemporary dentists’ apparatus, even in the developing world. Here, we underline the importance of awareness on radiation protection, image acquisition, familiarity with the software and image interpretation.
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Huang, Jin-Feng, Xiao-Zhao Chen, and Hong Wang. "Quality Control in Dental Cone-Beam Computed Tomography." Applied Sciences 11, no. 17 (September 2, 2021): 8162. http://dx.doi.org/10.3390/app11178162.

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Poor medical equipment may lead to misdiagnosis and missed diagnosis by doctors, leading to medical accidents. Given the differences in imaging methods, the performance determination method for conventional computed tomography (CT) does not apply to dental cone-beam computed tomography (CBCT). Therefore, a detection method that is more suitable for the characteristics of dental CBCT and more convenient for on-site operation in hospitals needs to be urgently developed. Hence, this study aimed to design a robust and convenient detection method to control the quality of dental CBCT, grasp the safety information of the equipment in a timely and effective manner, discover and evaluate equipment risks, and take reasonable and necessary countermeasures, thereby, reducing the risk of medical malpractice. This study adopted dose-area product to measure dose parameters and used objective quantitative evaluation methods instead of subjective evaluation methods for spatial resolution, contrast-to-noise ratio index, and uniformity. The dental CBCT of 10 dental hospitals and clinics were tested, and the findings revealed that the testing methods used had good accuracy and applicability.
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Scarfe, William C., Martin D. Levin, David Gane, and Allan G. Farman. "Use of Cone Beam Computed Tomography in Endodontics." International Journal of Dentistry 2009 (2009): 1–20. http://dx.doi.org/10.1155/2009/634567.

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Cone Beam Computed Tomography (CBCT) is a diagnostic imaging modality that provides high-quality, accurate three-dimensional (3D) representations of the osseous elements of the maxillofacial skeleton. CBCT systems are available that provide small field of view images at low dose with sufficient spatial resolution for applications in endodontic diagnosis, treatment guidance, and posttreatment evaluation. This article provides a literature review and pictorial demonstration of CBCT as an imaging adjunct for endodontics.
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Mork-Knutsen, Bjørn Bamse. "Hva er Cone Beam Computed Tomography (CBCT)?" Aktuel Nordisk Odontologi 43, no. 01 (December 1, 2017): 102–13. http://dx.doi.org/10.18261/issn.2058-7538-2018-01-09.

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Patel, S., S. Kanagasingam, and F. Mannocci. "Cone Beam Computed Tomography (CBCT) in Endodontics." Dental Update 37, no. 6 (July 2, 2010): 373–79. http://dx.doi.org/10.12968/denu.2010.37.6.373.

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Dissertations / Theses on the topic "Cone beam computer tomography CBCT"

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Zekry, Ahmed Khaled Ahmed Abdin. "Facial alveolar bone wall width: a cone beam computed tomography (CBCT) study in Asians." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2012. http://hub.hku.hk/bib/B48395663.

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Background: The width of the facial alveolar bone wall is crucial for long term successful esthetic outcomes of implants immediately placed into extraction sockets. A threshold of 2 mm is recommended to minimize buccal vertical bone resorption. Aim: To assess the width of the facial alveolar bone wall using cone-beam computed tomography images (CBCT). Methods: Retrospective CBCT images were acquired from a representative sample of Asians using the i-CAT® classic system with a 0.4 mm voxel size. At random, 200 CBCT images were selected according to predefined criteria. The DICOM file was imported into the i-Cat Vision® software. In the panoramic screen, the middle of each tooth was selected and, in the sagittal window, the middle cross section was selected for performing the measurements using a computer. The vertical distance from the alveolar crest (BC) - CEJ was measured. The width of the facial alveolar bone wall was measured at three locations: 1, 3, and 5 mm apical to BC. Descriptive statistics, frequency analyses, and multi-level comparisons were performed. Results: The sample consisted of 74 males and 126 females (mean age of 37.2 years; range 17-82 years). A total of 3618 teeth were assessed. There was no significant difference between the values of right and left sides, or between genders. However, statistically significant differences were observed between age groups at all levels. The distance from CEJ-BC varied from 0.4 to 4mm, with an overall tendency to increase with age. The mean width of the facial alveolar bone wall at anterior teeth was 0.9 mm and increased towards posterior regions. Rarely, a width of 2 mm was yielded (0.6-1.8 % for anterior teeth, 0.7- 30.8 % for posterior teeth). At a 5mm distance from BC, minimal widths of facial alveolar bone were identified for the anterior teeth. The frequency of dehiscence ranged from 9.9- 51.6 % for anterior and 3.1- 53.6 % for posterior teeth, respectively. Conclusion and clinical implications: A thin facial alveolar bone wall was usually present in both jaws. Hence, for most patients, adjunctive bone augmentation may be needed when installing implants in areas of esthetic concern.
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Dental Surgery
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Master of Dental Surgery
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Lalani, Sara. "Three-dimensional CBCT analysis of cranial base symmetry." Thesis, Boston University, 2015. https://hdl.handle.net/2144/37816.

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Thesis (MSD) --Boston University, Henry M. Goldman School of Dental Medicine, 2015 (Department of Orthodontics and Dentofacial Orthopedics).
Includes bibliographic references: leaves 37-42.
Background: Craniofacial skeletal asymmetry is a common finding in the general population that often goes undetected. Interest in this topic has led to many studies aimed at describing this type of asymmetry, its distribution and etioIogy. The cranial base, being cIosely related to the face and brain, is a key component in craniofacial growth and may also display varying amounts of asymmetry contributing to this anomaly. Though many studies have explored underlying skeletal asymmetry, most of them were limited by their two-dimensional method of investigation. With the advent of three-dimensional technology, more recent studies have had the advantage of studying the cranial base in its true anatomic form, resulting in greater accuracy of analysis. Despite access to this technoIogy, there is still a lack of literature regarding the cranial base in a normal population. Determining average skull base dimensions will provide a set of normative data that can be used as a reference for future studies. Material and Methods: Pre-treatment Cone Beam Computed Tomography (CBCT) films of 160 esthetic human subjects previously used by another investigator were screened for use in our current research. These DICOM files were imported into InVivoDental5.3 software (Anatomage[TM]; San Jose, Calif.) for screening and 70 CBCT scans were selected for analysis. All patients were classified as cervical vertebral stage 4 and above. The images were oriented in all three planes of space for uniformity and 14 bilateral anatomic landmarks were identified on each scan. A mid-sagittal reference plane was created using crista galli as the origin, and extending a perpendicular passing through the middle of the right and left clinoid points connected by a line, and through posterior points basion and opisthion. Each landmark was given an x-, y- and z- coordinate representing its three dimensional position and bilateral linear measurements to the reference plane were recorded using the software system. Statistical Analysis: InVivoDental5.3 software was used to calculate linear distances between each landmark and the mid-sagittal plane. This data was exported into Microsoft excel for analysis. Descriptive statistics of our sample and paired t-tests with a 5% significance level, or p value of 0.05, were performed. Results: The means of the right and left measurements of each bilateral landmark were calculated along with their standard deviations. A comparison between right and left means was accomplished with the use of paired t-tests. 12 1andmarks did not show a statistical difference in their locations on either side of the mid-sagittal plane. However, the means of 2 landmarks were found to be statistically significant. These were euryon (p = 0.01) and the jugular foramen (p = 0.00) Conclusion: The overall trend of our data indicated that the cranial base in a normal population, without craniofacial anomaly, displays symmetry, with the exception of the location of euryon and the jugular foramen. These findings are in accordance with those of similar three-dimensional studies. It is likely that the significant findings were due to tracing error, given the indiscrete location of euryon and the large, relatively asymmetric shape of the jugular foramen. However, if these structures are truly asymmetric, we can infer from our sample of symmetric patients, that there is no clinical relevance. Further studies with an increased sample size, additional landmarks or a more discrete sample can be performed to continue describing the skull base. The results of this study offer valuable reference data that can be used as a baseline for future studies.
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Giles, David. "Cone-beam computed tomography: imaging dose during CBCT scan acquisition and accuracy of CBCT based dose calculations." Thesis, McGill University, 2010. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=95242.

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Cone beam computed tomography (CBCT) is a recent development in radiotherapy for use in image guidance. Image guided radiotherapy using CBCT allows visualization of soft tissue targets and critical structures prior to treatment. Dose escalation is made possible by accurately localizing the target volume while reducing normal tissue toxicity. The kilovoltage x-rays of the cone beam imaging system contribute additional dose to the patient. In this study a 2D reference radiochromic film dosimetry method employing GAFCHROMICTM model XR-QA film is used to measure point skin doses and dose profiles from the Elekta XVI CBCT system integrated onto the Synergy linac. The soft tissue contrast of the daily CBCT images makes adaptive radiotherapy possible in the clinic. In order to track dose to the patient or utilize on-line replanning for adaptive radiotherapy the CBCT images must be used to calculate dose. A Hounsfield unit calibration method for scatter correction is investigated for heterogeneity corrected dose calculation in CBCT images. Three Hounsfield unit to density calibration tables are used for each of four cases including patients and an anthropomorphic phantom, and the calculated dose from each is compared to results from the clinical standard fan beam CT. The dose from the scan acquisition is reported and the effect of scan geometry and total output of the x-ray tube on dose magnitude and distribution is shown. The ability to calculate dose with CBCT is shown to improve with the use of patient specific density tables for scatter correction, and for high beam energies the calculated dose agreement is within 1%.
La tomographie par faisceaux conique (CBCT) informatisée a été récemment développée en radiothérapie pour l'utilisation de guidage par imagerie. La radiothérapie guidée par imagerie (IGRT) utilisant le CBCT, permet la visualisation des cibles à tissus mous et des structures critiques avant le traitement. En localisant précisément la cible, une « escalade » de dose est rendue possible et la toxicité des tissus sains est réduite. Les rayons-X à basse énergie (kilovoltage) du system d'imagerie du CBCT, contribue à une dose additionnelle pour le patient. Dans cette étude, une méthode dosimétrique utilisant un film 2D radiochromic (Gafchromic film, model XR-QA) a été employé pour mesurer des points de dose à la peau ainsi que des profiles de dose. Cette étude a été réalisée à l'aide d'un system d'Elekta XVI CBCT installé sur un accélérateur linéaire du Synergy. Le contraste des images quotidiennes du CBCT des tissus mous rend possible au niveau clinique l'utilisation de la radiothérapie adaptive. Dans le but de suivre la dose administrée au patient ou utiliser de la replanification en ligne pour la radiothérapie adaptive, les images CBCT doivent être utilisées pour le calcul de dose. Une calibration des unités de Hounsfield par méthode de correction de dispersion est examinée dans le cas de dose calculée dans des milieux hétérogènes pour les images CBCT. Trois unités de Hounsfield par table de calibration de densité sont utilisées pour chaque des quatre cas incluant des patients et un fantôme anthropomorphique. Le calcul de dose pour chaque cas est comparé avec les résultats cliniques standards de tomographie par faisceaux en éventail. La dose acquise avec le scanner est reportée et l'effet géométrique du scanner ainsi que le débit total du tube a rayon-X sur la magnitude et la distribution de la dose sont montrés. La capacité de calculer la dose avec un CBCT est présentée dans le but d'amélio
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Anamali, Sindhura. "Prevalence of the posterior superior alveolar canal assessed with cone beam computed tomography." Thesis, University of Iowa, 2012. https://ir.uiowa.edu/etd/1425.

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Allen, Jessica. "Evaluation of Maxillary Molar Furcations, Clinical Measurements versus Cone Beam Computed Tomography." VCU Scholars Compass, 2014. http://scholarscompass.vcu.edu/etd/3407.

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BACKGROUND: The use of three-dimensional imaging has shown to provide advantages to the clinician in assessing bone morphology. The aim of this study will be to compare the diagnostic efficacy of cone beam computed tomography (CBCT) versus diagnostic clinical measurements in patients presenting with furcation involved maxillary first molars. METHODS: The study population included 20 patients with 34 maxillary first molar teeth with furcation involvement. Clinical horizontal and vertical probing measurements were compared to CBCT measurements taken by two calibrated examiners. RESULTS: Horizontal measurements showed a significant difference between Glickman class II and class III. There were no statistical significant differences with the horizontal measurements between clinical probing, bone sounding and CBCT measurements. CBCT vertical measurements were statistically greater than clinical probing measurements. CONCLUSION: The CBCT can provide similar horizontal measurements to standard clinical horizontal probing measurements and will provide a greater vertical dimension of a furcation defect to standard vertical probing measurements.
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Chen, Shufei. "Markerless Lung Tumor Trajectory Estimation from Rotating Cone Beam Computed Tomography Projections." VCU Scholars Compass, 2016. http://scholarscompass.vcu.edu/etd/4439.

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Respiration introduces large tumor motion in the thoracic region which influences treatment outcome for lung cancer patients. Tumor motion management techniques require characterization of temporal tumor motions because tumor motion varies patient to patient, day to day and cycle to cycle. This work develops a markerless algorithm to estimate 3 dimensional (3D) lung-tumor trajectories on free breathing cone beam computed tomography (CBCT) projections, which are 2 dimensional (2D) sequential images rotating about an axis and are used to reconstruct 3D CBCT images. A gold standard tumor trajectory is required to guide the algorithm development and estimate the tumor detection accuracy for markerless tracking algorithms. However, a sufficient strategy to validate markerless tracking algorithms is lacking. A validation framework is developed based on fiducial markers. Markers are segmented and marker trajectories are xiv obtained. The displacement of the tumor to the marker is calculated and added to the segmented marker trajectory to generate reference tumor trajectory. Markerless tumor trajectory estimation (MLTM) algorithm is developed and improved to acquire tumor trajectory with clinical acceptable accuracy for locally advanced lung tumors. The development is separate into two parts. The first part considers none tumor deformation. It investigates shape and appearance of the template, moreover, a constraint method is introduced to narrow down the template matching searching region for more precise matching results. The second part is to accommodate tumor deformation near the end of the treatment. The accuracy of MLTM is calculated and compared against 4D CBCT, which is the current standard of care. In summary, a validation framework based on fiducial markers is successfully built. MLTM is successfully developed with or without the consideration of tumor deformation with promising accuracy. MLTM outperforms 4D CBCT in temporal tumor trajectory estimation.
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Patel, Alpesh. "Sensitivity and Accuracy of Cone Beam Computed Tomography in Diagnosing Osseous Defects at the Mandibular Condyle." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1363606389.

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Duggan, Sayward. "Alveolar Ridge Dimension Analysis Following Socket Preservation Using Clinical Assessment and Cone Beam Computed Tomography (CBCT)." VCU Scholars Compass, 2001. http://scholarscompass.vcu.edu/etd/2433.

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AIM: Extraction of a tooth can lead to alveolar ridge resorption which can be minimized by socket preservation. The aim of this study is to analyze vertical and horizontal alveolar ridge dimensions clinically and by CBCT immediately following extraction and 3-4 months following socket preservation. METHODS: The preserved group (P) consisted of 20 patients with1-2 non-molar teeth requiring extraction with socket preservation, while the control group (C) consisted of 5 patients requiring extraction alone. An acrylic stent was fabricated presurgically in order to measure vertical and horizontal ridge dimensions clinically and radiographically immediately following extraction and 3-4 months following socket preservation. RESULTS: Overall, P sites gained ridge height and lost minimal ridge width over 3-4 months, while C sites lost both ridge height and width. Preserved sites in which the teeth were extracted due to caries had the most significant gain in the radiographic vertical occlusal dimension (RVO). Overall, high correlations were found between the clinical and radiographic measurements at the initial surgery and at the 3-4 month follow up. CONCLUSIONS: The preserved group had minimal ridge resorption and more socket bony fill when compared to the non-preserved group 3-4 months following tooth extraction, especially when the tooth was extracted due to caries. Additionally, the CBCT can be a useful diagnostic tool to evaluate socket preservation healing, as it compares well to clinical assessments of socket healing.
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Ljungsell, Emma, and Elin Luoma. "Utvärdering av cone beam computed tomography som metod vid fraktur i övre extremiteter : - En jämförelse mellan modaliteter." Thesis, Hälsohögskolan, Högskolan i Jönköping, HHJ, Avd. för naturvetenskap och biomedicin, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-44642.

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Bakgrund: Cone beam computed tomography (CBCT) är en form av datortomografi vanlig inom odontologi och börjar utnyttjas mer inom ortopedisk diagnostik. Frakturer i övre extremiteter är vanligt förekommande i samband med trauma. Konventionell röntgen är oftast förstahandsmetod men kan inte alltid utesluta scaphoideumfraktur, som obehandlad kan ge allvarliga konsekvenser. Syfte: Syftet är att utvärdera CBCT som metod vid fraktur i övre extremiteter genom att jämföra med andra modaliteter. Metod: Arbetet är en systematisk litteraturstudie. Databaserna Medline, CINAHL och PubMed användes. Endast artiklar publicerade inom de senaste 10 åren inkluderades. Kvalitetsgranskning utfördes med protokoll från Hälsohögskolan i Jönköping. Resultat: 15 artiklar inkluderades i resultatet. Faktorer som identifierades var konkordans, stråldos, bildkvalitet, diagnostisk kvalitet samt patienttolerans och undersökningstid. CBCT hade överlägsen eller likvärdig konkordans. I åtta av nio artiklar visades CBCT ha lägre stråldos än jämförande modalitet. Generellt var bildkvaliteten god för CBCT. Skilda resultat uppkom för diagnostisk förmåga. Patienttoleransen var högre för CBCT än multidetektor-CT (MDCT) gällande tid. Slutsats: CBCT påvisade god bildkvalitet och diagnostisk förmåga till en relativt låg stråldos, samt högre sensitivitet och specificitet än konventionell röntgen. På grund av skillnader i mätinstrument i det insamlade materialet kan ingen definitiv slutsats dras. Vidare studier inom ämnet rekommenderas.
Background: Cone beam computed tomography (CBCT) is a method commonly used in odontology and is becoming more used in orthopedic diagnostics. Fractures in upper extremities are a common occurrence in trauma. Conventional radiography is often the firsthand method but cannot always exclude scaphoid fractures, which untreated can have serious consequences. Purpose: The purpose is to evaluate CBCT as an examination method for fractures in the upper extremities by comparing with other modalities. Method: This study is a systematic literature review. The databases used were Medline, CINAHL and PubMed. Only articles published within the last 10 years were included. A quality audit was implemented using a protocol from Jönköping University. Results: 15 articles were included. The factors identified were observer agreement, radiation dose, image quality, diagnostic quality, patient tolerance and image duration. CBCT had a better or equal observer agreement. In eight out of nine articles, CBCT was shown to have a lower radiation dose than its comparative modality. In general, a good image quality in CBCT was found. Differing results were found about diagnostic ability. The patient tolerance was higher for CBCT than multidetector-CT (MDCT) regarding image duration. Conclusions: CBCT demonstrated a good image quality and diagnostic ability to a relatively low radiation dose, and a higher sensitivity and specificity than conventional radiography. Due to differences in measuring instruments used in the gathered material, no definitive conclusion could be drawn. Further studies in the subject is recommended.
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Dhou, Salam. "IMAGE-BASED RESPIRATORY MOTION EXTRACTION AND RESPIRATION-CORRELATED CONE BEAM CT (4D-CBCT) RECONSTRUCTION." VCU Scholars Compass, 2013. http://scholarscompass.vcu.edu/etd/496.

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Accounting for respiration motion during imaging helps improve targeting precision in radiation therapy. Respiratory motion can be a major source of error in determining the position of thoracic and upper abdominal tumor targets during radiotherapy. Thus, extracting respiratory motion is a key task in radiation therapy planning. Respiration-correlated or four-dimensional CT (4DCT) imaging techniques have been recently integrated into imaging systems for verifying tumor position during treatment and managing respiration-induced tissue motion. The quality of the 4D reconstructed volumes is highly affected by the respiratory signal extracted and the phase sorting method used. This thesis is divided into two parts. In the first part, two image-based respiratory signal extraction methods are proposed and evaluated. Those methods are able to extract the respiratory signals from CBCT images without using external sources, implanted markers or even dependence on any structure in the images such as the diaphragm. The first method, called Local Intensity Feature Tracking (LIFT), extracts the respiratory signal depending on feature points extracted and tracked through the sequence of projections. The second method, called Intensity Flow Dimensionality Reduction (IFDR), detects the respiration signal by computing the optical flow motion of every pixel in each pair of adjacent projections. Then, the motion variance in the optical flow dataset is extracted using linear and non-linear dimensionality reduction techniques to represent a respiratory signal. Experiments conducted on clinical datasets showed that the respiratory signal was successfully extracted using both proposed methods and it correlates well with standard respiratory signals such as diaphragm position and the internal markers’ signal. In the second part of this thesis, 4D-CBCT reconstruction based on different phase sorting techniques is studied. The quality of the 4D reconstructed images is evaluated and compared for different phase sorting methods such as internal markers, external markers and image-based methods (LIFT and IFDR). Also, a method for generating additional projections to be used in 4D-CBCT reconstruction is proposed to reduce the artifacts that result when reconstructing from an insufficient number of projections. Experimental results showed that the feasibility of the proposed method in recovering the edges and reducing the streak artifacts.
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Books on the topic "Cone beam computer tomography CBCT"

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Computed tomography: From photon statistics to modern cone-beam CT. Berlin: Springer, 2008.

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Book chapters on the topic "Cone beam computer tomography CBCT"

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Jadu, Fatima M., and Ernest W. N. Lam. "CBCT Sialography." In Maxillofacial Cone Beam Computed Tomography, 1017–36. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-62061-9_25.

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Pauwels, Ruben. "CBCT Quality Assurance." In Maxillofacial Cone Beam Computed Tomography, 213–26. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-62061-9_7.

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Farman, Allan G., and William C. Scarfe. "Historical Perspectives on CBCT." In Maxillofacial Cone Beam Computed Tomography, 3–11. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-62061-9_1.

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Yang, Jie, William C. Scarfe, and Christos Angelopoulos. "Incidental Findings on CBCT." In Maxillofacial Cone Beam Computed Tomography, 553–89. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-62061-9_16.

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Doyle, Scott L., Bruno Azevedo, Martin D. Levin, David Gane, Allan G. Farman, and William C. Scarfe. "Endodontic Applications of CBCT." In Maxillofacial Cone Beam Computed Tomography, 871–922. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-62061-9_22.

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Harrell, William E., William C. Scarfe, Lucas Rodrigues Pinheiro, and Allan G. Farman. "Applications of CBCT in Orthodontics." In Maxillofacial Cone Beam Computed Tomography, 645–714. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-62061-9_18.

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Kamburoğlu, Kivanç, Dirk Schulze, Sema Murat, Saulo L. Sousa Melo, Zhimin Li, Michael M. Bornstein, Christos Angelopoulos, and William C. Scarfe. "CBCT Imaging of Sinonasal Disease." In Maxillofacial Cone Beam Computed Tomography, 1155–205. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-62061-9_30.

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Grant, Gerald T., Jayanthi Parthasarathy, Shivakumar Raman, Bruno Azevedo, and William C. Scarfe. "CBCT and Additive Manufacturing Technology." In Maxillofacial Cone Beam Computed Tomography, 1207–42. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-62061-9_31.

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Scarfe, William C., and Christos Angelopoulos. "CBCT Use in Daily Practice." In Maxillofacial Cone Beam Computed Tomography, 115–89. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-62061-9_5.

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Rozylo-Kalinowska, Ingrid. "Dental Cone-Beam Computed Tomography (CBCT)." In Imaging Techniques in Dental Radiology, 65–77. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-41372-9_6.

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Conference papers on the topic "Cone beam computer tomography CBCT"

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Fu, Yabo, Yang Lei, Yingzi Liu, Tonghe Wang, Walter J. Curran, Tian Liu, Pretesh Patel, and Xiaofeng Yang. "Cone-beam Computed Tomography (CBCT) and CT image registration aided by CBCT-based synthetic CT." In Image Processing, edited by Bennett A. Landman and Ivana Išgum. SPIE, 2020. http://dx.doi.org/10.1117/12.2549095.

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Jarry, G., S. A. Graham, D. A. Jaffray, D. J. Moseley, and F. Verhaegen. "Scatter correction for kilovoltage cone-beam computed tomography (CBCT) images using Monte Carlo simulations." In Medical Imaging, edited by Michael J. Flynn and Jiang Hsieh. SPIE, 2006. http://dx.doi.org/10.1117/12.653803.

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Choi, Sunghoon, Ye-seul Kim, Haenghwa Lee, Donghoon Lee, Chang-Woo Seo, and Hee-Joung Kim. "Imaging characteristics of distance-driven method in a prototype cone-beam computed tomography (CBCT)." In SPIE Medical Imaging, edited by Despina Kontos, Thomas G. Flohr, and Joseph Y. Lo. SPIE, 2016. http://dx.doi.org/10.1117/12.2216483.

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Vijayan, Sarath, Zhenyu Xiong, Stephen Rudin, and Daniel R. Bednarek. "A system to track skin dose for neuro-interventional cone-beam computed tomography (CBCT)." In SPIE Medical Imaging, edited by Despina Kontos, Thomas G. Flohr, and Joseph Y. Lo. SPIE, 2016. http://dx.doi.org/10.1117/12.2216931.

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Han, Tao, Chao-Jen Lai, Lingyun Chen, Xinming Liu, Youtao Shen, Yuncheng Zhong, Shuaiping Ge, et al. "Breast density measurement: 3D cone beam computed tomography (CBCT) images versus 2D digital mammograms." In SPIE Medical Imaging, edited by Ehsan Samei and Jiang Hsieh. SPIE, 2009. http://dx.doi.org/10.1117/12.813823.

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Jain, A., H. Takemoto, M. D. Silver, S. V. S. Nagesh, C. N. Ionita, D. R. Bednarek, and S. Rudin. "Region-of-interest cone beam computed tomography (ROI CBCT) with a high resolution CMOS detector." In SPIE Medical Imaging, edited by Christoph Hoeschen, Despina Kontos, and Thomas G. Flohr. SPIE, 2015. http://dx.doi.org/10.1117/12.2081450.

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Conover, David L., Ruola Ning, Yong Yu, Xianghua Lu, Ronald W. Wood, Jay E. Reeder, and Aimee M. Johnson. "Small animal imaging using a flat panel detector-based cone beam computed tomography (FPD-CBCT) imaging system." In Medical Imaging, edited by Michael J. Flynn. SPIE, 2005. http://dx.doi.org/10.1117/12.595582.

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Revelo, A. E., C. Ghattas, J. K. Pannu, E. Josan, and N. J. Pastis. "A Pilot Study of Robotic Assisted Bronchoscopy and Cone Beam Computed Tomography (CBCT)Training Curricula for Advanced Fellowship Trainees." In American Thoracic Society 2022 International Conference, May 13-18, 2022 - San Francisco, CA. American Thoracic Society, 2022. http://dx.doi.org/10.1164/ajrccm-conference.2022.205.1_meetingabstracts.a3966.

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Shankar, Alok, Jordan M. Krebs, Alexander R. Podgorsak, Ciprian N. Ionita, Daniel R. Bednarek, and Stephen Rudin. "Rapid cone-beam computed tomography (CBCT) using an ultra-high frame rate imaging photon counting detector (PCD) with 100 µm resolution." In Biomedical Applications in Molecular, Structural, and Functional Imaging, edited by Barjor Gimi and Andrzej Krol. SPIE, 2019. http://dx.doi.org/10.1117/12.2512881.

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Savignano, Roberto, Sandro Barone, Alessandro Paoli, and Armando V. Razionale. "FEM Analysis of Bone-Ligaments-Tooth Models for Biomechanical Simulation of Individual Orthodontic Devices." In ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/detc2014-34912.

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Abstract:
In the last decades, research in the orthodontic field has focused on the development of more comfortable and aesthetic appliances such as thermoformed aligners. Aligners have been used in orthodontics since the mid 20-century. Nonetheless, there is still not enough knowledge about how they interact with teeth. This paper is focused on the development of a Finite Element Method (FEM) model to be used in the optimization process of geometrical attributes of removable aligners. The presented method integrates Cone Beam Computed Tomography (CBCT) data and optical data in order to obtain a customized model of the dental structures, which include both crown and root shapes. The digital simulation has been focused on analyzing the behavior of three upper frontal teeth. Moreover, the analyses have been carried out by using different aligners’ thicknesses with the support of composite structures polymerized on teeth surfaces while simulating a 2 degrees rotation of an upper central incisor.
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