Observer Reliability of Cephalometric Landmark Identification on 3-D MR Images PDF Download
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Author: Michael S. Pollack
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 180
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Book Description
Author: Michael S. Pollack
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 180
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Book Description
Author: Rujuta Amol Katkar
Publisher:
ISBN:
Category : Cephalometry
Languages : en
Pages : 74
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Book Description
Author: Onur Kadioglu
Publisher: Springer
ISBN: 3030007227
Category : Medical
Languages : en
Pages : 251
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Book Description
This book is designed to serve as an up-to-date reference on the use of cone-beam computed tomography for the purpose of 3D imaging of the craniofacial complex. The focus is in particular on the ways in which craniofacial 3D imaging changes how we think about conventional diagnosis and treatment planning and on its clinical applications within orthodontics and oral and maxillofacial surgery. Emphasis is placed on the value of 3D imaging in visualizing the limits of the alveolar bone, the airways, and the temporomandibular joints and the consequences for treatment planning and execution. The book will equip readers with the knowledge required in order to apply and interpret 3D imaging to the benefit of patients. All of the authors have been carefully selected on the basis of their expertise in the field. In describing current thinking on the merits of 3D craniofacial imaging, they draw both on the available scientific literature and on their own translational research findings.
Author: Llon Hurst Clendenen
Publisher:
ISBN:
Category :
Languages : en
Pages : 84
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Book Description
The purpose of this study was to compare examiner reliability of cephalometric measurements from cone beam computed tomography (CBCT) and conventional digital cephalograms. Three imaging modalities were compared: CBCT using maximum intensity projection and ray-sum algorithms, and conventional digital cephalograms. Blinded examiners were calibrated, and intra- and inter-examiner reliability were assessed. Data were collected on a convenience sample of seven subjects. Examiners obtained linear and angular measures on each of the subjects' images, and rater consistency among the three methods were assessed using repeated measures analysis of variance of intraclass correlation coefficient ratios. A statistically significantly greater level of consistency for linear measurements was seen with the CBCT images. For the conventional digital images, linear measurements showed less consistency than angular measurements. This statistical significance unlikely correlates to a clinical significance. For orthodontic diagnosis, treatment planning, and treatment evaluation, CBCT generated cephalograms are equally effective to conventional digital cephalograms.
Author: Alexander Jacobson
Publisher: Quintessence Publishing (IL)
ISBN:
Category : Medical
Languages : en
Pages : 326
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Book Description
Accompanying CD-ROM contains ... "an 'average' template and larger and smaller 'normal' templates ... Also provided are instructions for the digital application of the templates to accommodate skulls of all sizes."--Page ix.
Author:
Publisher:
ISBN:
Category : Dentistry
Languages : en
Pages : 238
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Book Description
Author: Carole H. Sudre
Publisher: Springer Nature
ISBN: 3030603652
Category : Computers
Languages : en
Pages : 233
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Book Description
This book constitutes the refereed proceedings of the Second International Workshop on Uncertainty for Safe Utilization of Machine Learning in Medical Imaging, UNSURE 2020, and the Third International Workshop on Graphs in Biomedical Image Analysis, GRAIL 2020, held in conjunction with MICCAI 2020, in Lima, Peru, in October 2020. The workshops were held virtually due to the COVID-19 pandemic. For UNSURE 2020, 10 papers from 18 submissions were accepted for publication. They focus on developing awareness and encouraging research in the field of uncertainty modelling to enable safe implementation of machine learning tools in the clinical world. GRAIL 2020 accepted 10 papers from the 12 submissions received. The workshop aims to bring together scientists that use and develop graph-based models for the analysis of biomedical images and to encourage the exploration of graph-based models for difficult clinical problems within a variety of biomedical imaging contexts.
Author: Michael G. Payne
Publisher:
ISBN:
Category : Dental photography
Languages : en
Pages :
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Book Description
Introduction:With attention being given to the deleterious effects of radiation exposure from dental radiographs and inaccuracies in cephalometric soft tissue measurements, an alternative method of facial analysis with sufficiently reliable soft tissue landmarks should be developed. The goals of this study were threefold: (1) to define a new, low-cost method for capturing standardized frontal and sagittal facial images, (2) to determine on which photographic view that landmarks can be more reliably located, and (3) to determine which landmarks are appropriate for quantitative facial analysis. Materials and Methods:Simultaneous frontal and right sagittal facial images of 10 male and 10 female dental student subjects were captured using high-definition webcams as part of a low-cost set-up. Seventeen identical predefined facial soft tissue landmarks were located by 5 examiners on both types of images and were recorded as coordinate values. These coordinate values were used to calculate the best estimate of the true value for each landmark, mean deviation from this best estimate, and reliability in the X- and Y-axes using the Shrout-Fleiss intraclass correlation coefficient with corresponding 95% confidence intervals. Two examiners repeated the landmark location to evaluate intra-examiner reliability. Results:With a 95% confidence interval range of>0.950, nose and mouth landmarks were among the most reliable landmarks on frontal and sagittal facial images. Converselyright soft tissue gonionwas one of the least reliable landmarks located in this study. In general, landmarks located by a single examiner showed greater reliability than when there were multiple examiners. Conclusions:This low-cost method yielded frontal and sagittal images sufficient for landmark identification. The magnitude of error varies between landmarks, is largest for poorly demarcated landmarks, and most had a non-circular envelope of error. Certain landmarks were more reliable on sagittal images and others were more reliable on frontal images. All landmarks had greater reliability and less mean deviation when located by a single examiner.
Author: Suzanne Elizabeth Cziraki
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
This study evaluated and compared the reproducibility and accuracy of cephalometric landmarks and measurements between conventional radiographic film and the corresponding indirect, JPEG compressed or direct digital images (DI). Twenty-one conventional films were indirectly digitized using a scanner, and TIFF images were converted to JPEG files using 2 levels of compression (12:1 and 25:1). Simultaneous acquisition of conventional and direct DI (stimulable-storage phosphor (SPP)) was obtained for thirty patients. Three observers for the indirect and one observer for the direct DI identified 17 and 22 landmarks respectively on the computer monitor. X and y-coordinates were recorded and cephalometric measurements calculated. Statistical analysis involved use of the paired samples t-tests and ANOVA models. The results showed that indirect DI have equivalent landmark reproducibility with conventional film. JPEG compression of indirect DI at 25:1 level results in loss in accuracy of cephalometric measurement when compared to non-compressed DI, whereas, JPEG at 12:1 did not. Direct DI were less accurate for 8 out of 21 landmarks but clinical accuracy of cephalometric measurement was equivalent to conventional film.
Author: Om Prakash Kharbanda
Publisher: Elsevier Health Sciences
ISBN: 8131249360
Category : Medical
Languages : en
Pages : 1022
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Book Description
The second edition is expanded and rejuvenated with a greater focus on PG students, orthodontic educators, UG students and practitioners. The book covers entire panorama of science and clinical practice of orthodontics, from basics to clinical, presented in 58 chapters organised in 15 sections. The information is provided in-depth, literature supported, complimented with real life scenarios and case reports. A special effort has been made to include structured information on subjects of relevance which are much talked about but found only in journals. Contains a balanced blend of texts, graphics, boxes and clinical case reports encountered in clinical practice A comprehensive coverage of cephalometric radiology, ethnic norms and advances in three-dimensional imaging A detailed step by step approach to orthodontic treatment with contemporary fixed appliances, from diagnosis to finishing Provides an up-to-date information on topics of day-to-day relevance such as epidemiology of malocclusion and orthodontic indices, psychological aspects of orthodontics, debonding, care and maintenance of occlusion after orthodontic treatment Presents updated information on temporary anchorage devices (TAD), impacted and transposed teeth, inter-disciplinary treatment, management of cleft lip and palate and orthognathic surgery Emerging fields such as surgically facilitated rapid tooth movement, distraction osteogenesis and obstructive sleep apnoea (OSA) are included with up-to-date clinically relevant information Includes Companion Website containing procedural videos
