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Comparative Linear Accuracy Of Cone Beam Ct Derived 3d Images In Orthodontic Analysis
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Book Synopsis Comparative Linear Accuracy of Cone Beam CT Derived 3D Images in Orthodontic Analysis by : April A. Brown
Download or read book Comparative Linear Accuracy of Cone Beam CT Derived 3D Images in Orthodontic Analysis written by April A. Brown and published by . This book was released on 2008 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Objective. To compare the in vitro reliability and accuracy of linear measurements between cephalometric landmarks on CBCT 3D images with varying basis projection images to direct measurements on human skulls. Methods. Sixteen linear dimensions between anatomical sites marked on 19 human skulls were directly measured. Skulls were imaged with CBCT at three settings: 153, 306, and 612 basis projections. The mean absolute error and modality mean of linear measurements between landmarks on 3D images were compared to the anatomic truth. Results. No difference in mean absolute error between the scan settings was found. The average skull absolute error between marked reference points were less than the distances between unmarked reference sites. Conclusion. CBCT measurements were consistent between scan sequences and for direct measurements between marked reference points. Reducing the number of projections for 3D reconstruction did not lead to reduced dimensional accuracy and potentially provides reduced patient radiation exposure.
Book Synopsis Comparative Linear Accuracy and Reliability of Cone Beam CT Derived 2-dimensional and 3-dimensional Images Constructed Using an Orthodontic Volumetric Rendering Program by : Danielle R. Periago
Download or read book Comparative Linear Accuracy and Reliability of Cone Beam CT Derived 2-dimensional and 3-dimensional Images Constructed Using an Orthodontic Volumetric Rendering Program written by Danielle R. Periago and published by . This book was released on 2007 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this project was to compare the accuracy and reliability of linear measurements made on 2D projections and 3D reconstructions using Dolphin 3D software (Chatsworth, CA) as compared to direct measurements made on human skulls. The linear dimensions between 6 bilateral and 8 mid-sagittal anatomical landmarks on 23 dentate dry human skulls were measured three times by multiple observers using a digital caliper to provide twenty orthodontic linear measurements. The skulls were stabilized and imaged via PSP digital cephalometry as well as CBCT. The PSP cephalograms were imported into Dolphin (Chatsworth, CA, USA) and the 3D volumetric data set was imported into Dolphin 3D (Version 2.3, Chatsworth, CA, USA).Using Dolphin 3D, planar cephalograms as well as 3D volumetric surface reconstructions were (3D CBCT) generated. The linear measurements between landmarks of each three modalities were then computed by a single observer three times. For 2D measurements, a one way ANOVA for each measurement dimension was calculated as well as a post hoc Scheffe multiple comparison test with the anatomic distance as the control group. 3D measurements were compared to anatomic truth using Student's t test (P [less than or equal to] 50.05). The intraclass correlation coefficient (ICC) and absolute linear and percentage error were determined as indices of intraobserver reliability. Our results show that for 2D mid sagittal measurements that Simulated LC images are accurate and similar to those from PSP images (except for Ba-Na), and for bilateral measurements simulated LC measurements were similar to PSP but less accurate, underestimating dimensions by between 4.7% to 17%.For 3D volumetric renderings, 2/3 rd of CBCT measurements are statistically different from actual measurements, however this possibly is not clinically relevant.
Book Synopsis Comparative Linear Accuracy and Reliability of Cone Beam CT Derived 2-dimensional Images and Conventional Lateral Cephalometric Images Using Photostimulable Storage Phosphors by : Mazyar Moshiri
Download or read book Comparative Linear Accuracy and Reliability of Cone Beam CT Derived 2-dimensional Images and Conventional Lateral Cephalometric Images Using Photostimulable Storage Phosphors written by Mazyar Moshiri and published by . This book was released on 2008 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this project was to compare the accuracy and precision of linear measurements made on conventional lateral cephalograms (LC) and simulated LC using cone-beam computed tomography (CBCT) to direct measurements on dentate skulls. The linear distances for 5 mid-sagittal and 4 bilateral measurements between anatomical landmarks on 22 skulls were measured by two observers. The skulls were imaged using a CBCT scanner at 4 scan settings: high resolution (0.2mm) and normal resolution (0.4mm) at 20-sec (306 projections) and 40-sec scans (612 projections). Three simulated LC were generated: Ray sum image reconstructions of the maximum thickness mid-sagittal multiplanar projections, a single frame basis projection, and the scout image. LCs were acquired using a storage phosphor system. Projection images were exported into a cephalometric analysis program and linear measurements determined. Analyses were repeated three times and statistically compared to measured anatomic truth using repeated measures general linear model (p [less than or equal to] 0.05). The mean absolute error was used as an index of precision. While there were statistical differences between skull and modality measurements for 6 of the nine measurements, there were no overall differences between LC and CBCT derived image measurements irrespective of method of construction. CBCT imaging provides clinically reliable 2D simulation images however, dose considerations demand that evidence-based selection criteria should be developed for CBCT in orthodontics that take into account the ALARA principle.
Book Synopsis Cone Beam Computed Tomography in Orthodontics by : Sunil D. Kapila
Download or read book Cone Beam Computed Tomography in Orthodontics written by Sunil D. Kapila and published by John Wiley & Sons. This book was released on 2014-08-29 with total page 880 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since its introduction to dentistry, cone beam computed tomography (CBCT) has undergone a rapid evolution and considerable integration into orthodontics. However, despite the increasing popularity of CBCT and progress in applying it to clinical orthodontics, the profession has lacked a cohesive, comprehensive and objective reference that provides clinicians with the background needed to utilize this technology optimally for treating their patients. Cone Beam Computed Tomography in Orthodontics provides timely, impartial, and state-of-the-art information on the indications and protocols for CBCT imaging in orthodontics, clinical insights gained from these images, and innovations driven by these insights. As such, it is the most current and authoritative textbook on CBCT in orthodontics. Cone Beam Computed Tomography in Orthodontics is organized to progress sequentially through specific topics so as to build the knowledgebase logically in this important and rapidly evolving field. Part I provides the foundational information on CBCT technology, including radiation exposure and risks, and future evolutions in computed tomography. Part II presents the Principles and Protocols for CBCT Imaging in Orthodontics, focusing on developing evidence-based criteria for CBCT imaging, the medico-legal implications of CBCT to the professional and the protocols and integration of this technology in orthodontic practice. Part III provides critical information on CBCT-based Diagnosis and Treatment Planning that includes how to interpret CBCT scans, identify incidental pathologies and the possible other uses of this technology. Part IV covers practical aspects of CBCT’s Clinical Applications and Treatment Outcomes that encompasses a range of topics, including root morphology and position, treatment of impacted teeth, virtual surgical treatment planning and outcomes, and more.
Book Synopsis Craniofacial 3D Imaging by : Onur Kadioglu
Download or read book Craniofacial 3D Imaging written by Onur Kadioglu and published by Springer. This book was released on 2019-01-28 with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Comparative Accuracy of Linear Measures from Conventional Digital and Cone Beam Computed Tomography Simulated Posterior Anterior Cephalograms by : Brian M. Mannari
Download or read book Comparative Accuracy of Linear Measures from Conventional Digital and Cone Beam Computed Tomography Simulated Posterior Anterior Cephalograms written by Brian M. Mannari and published by . This book was released on 2007 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this project was to compare the accuracy and reliability of linear measurements on posterior-anterior (PA) cephalograms made conventionally using photostimulable storage phosphor imaging plates (PSP) and simulated PA cephalometric images from ray sum reconstruction of cone beam computed tomographic (CBCT) volumetric datasets of the same anatomic specimens. The sample consisted of 19 dried dentate human skulls which were imaged using PA cephalometry using PSP imaging plates and three CBCT datasets at 10 s., 20 s. and 40 s. scanning times from which ray sum simulated PA images were produced. Various anatomic landmarks were identified and truth measurements of 13 selected cephalometric linear dimensions were measured directly on the skulls using a high precision caliper. CBCT datasets were imported into a reconstruction program (Dolphin 3D Software) from which ray sum PA images were constructed. Linear cephalometric measurements on PSP and CBCT simulated PA images were performed by one observer using Dolphin Imaging Software. Intraobserver reliability was determined by calculating and comparing Intraclass correlation coefficient. Mean absolute and percentage errors were calculated for each dimension and modality to quantify the reliability error. Mean modality measurements were compared. All other groups were compared using one-way ANOVA with Tukey post hoc comparisons (p [less than or equal to] 0.05). While the ICC was high, PSP cephalometric absolute error was greater than anatomic distances and CBCT image measurements for 8 for 13 measurements. We found that for most measurements, simulated PA images produced from reconstructed CBCT volumetric dataset were accurate and compared well to PSP cephalometric images except for Z-Ag. We also found that PSP cephalometric images consistently underestimated MO-MO dimensions. Measurements on CBCT simulated PA images are more reliabile and as accuracte as PSP cephalometric measurements. The number of projections comprising the reconstructed simulated PA image did not influence reliability or accuracy. Therefore in accordance with ALARA, when CBCT imaging is used to generate simulated PA images, the lowest number of projections are recommended.
Book Synopsis Cone Beam Computed Tomography by : Prashant P Jaju
Download or read book Cone Beam Computed Tomography written by Prashant P Jaju and published by JP Medical Ltd. This book was released on 2015-05-10 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cone Beam Computed Tomography is an imaging technique in which x-rays diverge to form a cone. Cone Beam Computed Tomography: A Clinician’s Guide to 3D Imaging is a concise, highly illustrated manual on this increasingly important form of imaging in dentistry. Divided into twelve chapters, the book begins with a history of Cone Beam Computed Tomography, followed by chapters on the physics and apparatus of CBCT and the need for CBCT in dentistry. Further chapters cover the role of CBCT in specific sub-specialties of dentistry, and a glossary provides an explanation of CBCT terminology. The role of CBCT in prosthodontics, orthodontics and airway analysis, endodontics and caries diagnosis, oral and maxillofacial pathologies, periodontal disease and forensic odontology, is described in detail. This book also brings the reader up to date on possible future applications of CBCT in dentistry. Cone Beam Computed Tomography: A Clinician’s Guide to 3D Imaging includes 180 full colour images and illustrations, further enhancing this invaluable resource for dentists. Key Points Concise guide to 3D imaging in dentistry Includes a history and basics of CBCT, as well as the role of CBCT in various dentistry sub-specialties 189 full colour images and illustrations
Book Synopsis Cone Beam Computed Tomography: From Capture to Reporting, An Issue of Dental Clinics of North America by : Dale A. Miles
Download or read book Cone Beam Computed Tomography: From Capture to Reporting, An Issue of Dental Clinics of North America written by Dale A. Miles and published by Elsevier Health Sciences. This book was released on 2014-07-28 with total page 265 pages. Available in PDF, EPUB and Kindle. Book excerpt: This issue of Dental Clinics updates topics in CBCT and Dental Imaging. Articles will cover: basic principles of CBCT; artifacts interfering with interpretation of CBCT; basic anatomy in the three anatomic planes of section; endodontic applications of CBCT; pre-surgical implant site assessment; software tools for surgical guide construction; CBCT for the nasal cavity and paranasal sinuses; CBCT and OSA and sleep disordered breathing; update on CBCT and orthodontic analyses; liabilities and risks of using CBCT; reporting findings in a CBCT volume, and more!
Book Synopsis Comparison of Conventional and Automated Cephalometric Analysis Using Cone-Beam Computed Tomography by : Andrew Paige
Download or read book Comparison of Conventional and Automated Cephalometric Analysis Using Cone-Beam Computed Tomography written by Andrew Paige and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since its advent in 1931, analysis of lateral cephalometric radiographs has been an important aspect of orthodontic diagnosis and treatment planning. This type of orthodontic analysis provides a quantitative evaluation of the positions of various anatomical structures of the face, including skeletal, dental, and soft tissue features. Cephalometric analysis, however, is a time-consuming process and is not always performed in clinical practice. Cephalometric analysis from Cone-Beam Computed Tomography (CBCT) imaging is particularly cumbersome, requiring both reconstruction of a two-dimensional lateral cephalogram as well as subsequent computer-assisted tracing analysis using a program such as Dolphin. As the use of CBCT continues to become more prominent in orthodontics, methodologies to expedite cephalometric analysis may be valuable in facilitating their use by clinicians. Several different commercially available (e.g. CephX) and proprietary products have been created to analyze cephalometric radiographs using automated artificial intelligence (AI), but the accuracy of these products remains incompletely established. Our study examined the accuracy and workflow impacts of CephX's ABO analysis directly from CBCT compared to manual reconstruction and tracing by human examiners on 40 CBCT volumes. We hypothesized that automatically generated cephalometric analyses from CBCT volumes would differ significantly from those generated by human examiners, and that workflow time would be statistically significantly decreased in the automated analysis. In contrast, overall workflow time was found to be significantly greater for the CephX software than for the human examiners. Furthermore, our study showed that seven of the eleven measurements in the ABO analysis differed statistically significantly from the human examiners: SNB, ANB, SN-MP, L1-NB, L1-MP, LL to E-Plane, and UL to E-Plane. Nine of the eleven measurements showed average measurement error within clinically acceptable limits, while two showed greater average error than is clinically acceptable - U1-SN and L1-MP were the least accurate measurement in our study. Bland-Altman plots were constructed showing that FMA may show a slight tendency towards greater accuracy at high values, while LL to E-Plane may display a slight tendency to underestimate more frequently at low values and overestimate more frequently at high values. Only one measurement (ANB) showed limits of agreement within the maximum allowed difference; ten out of the eleven variables exceeded the maximum allowed difference. Overall, CephX may offer clinically acceptable performance for most variables in the ABO analysis, but needs further improvement overall, particularly with the inclination of the upper and lower incisors (U1-SN and L1-MP).
Book Synopsis Three-Dimensional Imaging for Orthodontics and Maxillofacial Surgery by : Chung H. Kau
Download or read book Three-Dimensional Imaging for Orthodontics and Maxillofacial Surgery written by Chung H. Kau and published by John Wiley & Sons. This book was released on 2011-06-09 with total page 359 pages. Available in PDF, EPUB and Kindle. Book excerpt: Three Dimensional Imaging for Orthodontics and Maxillofacial Surgery is a major new specialist resource that identifies and applies the principles of three dimensional imaging to orthodontic practice. Readers are introduced to three-dimensional imaging, comparing it with the traditional two-dimensional assessments and exploring the benefits and drawbacks of these imaging modalities. Three Dimensional Imaging for Orthodontics and Maxillofacial Surgery centers on the appropriate application of three-dimensional imaging in the various practices related to orthodontic delivery and craniofacial surgery. The book guides the reader through detailed and illustrated examples of three-dimensional patient management in the context of daily practice. Both three-dimensional static and motion analyses are explored. The book also addresses growth, orthodontic treatment and surgical prediction, both static and dynamic and explores the use of morphing and finite element analyses with particular focus on surgical intervention. A key resource for specialist working in the fields of orthodontics and cranio-maxillofacial surgery. KEY FEATURES · Applies principles of 3D imaging to orthodontic practice · Surveys and analyzes current technologies and modalities, relating them to clinical usage · Companion website with motion images ( www.wiley.com/go/kau) · Richly illustrated in full color throughout · Brings together expert contributors for an international perspective
Book Synopsis Comparison of Cone Beam CT Reconstructed Lateral Cephalometric Images with Conventional Lateral Cephalometric Radiographs by : Loren W. Jolley
Download or read book Comparison of Cone Beam CT Reconstructed Lateral Cephalometric Images with Conventional Lateral Cephalometric Radiographs written by Loren W. Jolley and published by . This book was released on 2006 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ultrasonography in Dentomaxillofacial Diagnostics by : Kaan Orhan
Download or read book Ultrasonography in Dentomaxillofacial Diagnostics written by Kaan Orhan and published by Springer Nature. This book was released on 2021-03-03 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers a comprehensive review of the state of the art in Ultrasonography (USG) dentomaxillofacial imaging to help radiologists and dentists in their training and daily practice. The book examines the relationship between clinical features, diagnosis, and choice of minimally invasive technique for a range of dentomaxillofacial disorders and provides information on post-treatment therapy. Accurate interpretation of indications for treatment is the cornerstone of success in medicine, and as such, the book explains how the selection of imaging technique is closely linked to clinical and diagnostic aspects and how recognition of this relationship forms the foundation for optimal outcomes. In addition to examining the various modalities, the book highlights the role of the latest USG imaging techniques. Further, it discusses in detail the pathology, treatment, and prognosis of common and rare diseases, as well as congenital/developmental malformations in the dentomaxillofacial, an area that is often underestimated and largely ignored by dentists. Featuring updated high-resolution images created with state-of-the-art equipment, the book introduces readers to current imaging modalities. It also includes pathological descriptions of radiologic diagnoses to help clarify the pathophysiology of the disease, while the pearls and pitfalls of image interpretation provide a quick reference guide for practitioners. Written by leading international experts, this outstanding book is a valuable resource for both radiologists, dentists and students seeking a more in-depth appreciation of the subject and its contribution to the scientific radiology community.
Book Synopsis Comparative Analysis of Traditional Radiographs and Cone Beam Computed Tomography Volumeric Images in the Diagnosis and Treatment Planning of Maxillary Impacted Cuspids by : Eric V. Haney
Download or read book Comparative Analysis of Traditional Radiographs and Cone Beam Computed Tomography Volumeric Images in the Diagnosis and Treatment Planning of Maxillary Impacted Cuspids written by Eric V. Haney and published by . This book was released on 2006 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis High Field Brain MRI by : Ugo Salvolini
Download or read book High Field Brain MRI written by Ugo Salvolini and published by Springer Science & Business Media. This book was released on 2006-06-23 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the development of systems of magnetic resonance imaging using the higher magnetic field strength of 3 tesla, in comparison to the current gold standard of 1.5 tesla. These new systems of MRI make it possible to perform with high spatial, temporal and contrast resolution not only morphological examinations but also functional studies on spectroscopy, diffusion, perfusion, and cortical activation, thus helping research and providing an important tool for routine diagnostic activity. At the same time the new systems offer unparalleled sensitivity and specificity in the numerous conditions of neuroradiological interest.
Book Synopsis CONE BEAM COMPUTED TOMOGRAPHY IN ORTHODONTICS by : Dr. SHREYA SHARMA
Download or read book CONE BEAM COMPUTED TOMOGRAPHY IN ORTHODONTICS written by Dr. SHREYA SHARMA and published by Book Rivers. This book was released on 2022-02-07 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Automatic Point Acquisition for 3-Dimensional Cephalometric Analysis by : Ryann Christensen
Download or read book Automatic Point Acquisition for 3-Dimensional Cephalometric Analysis written by Ryann Christensen and published by . This book was released on 2017 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: Objectives: The increased use of 3-dimensional (3D) cone-beam computed tomography (CBCT) in orthodontic and orthognathic cases has provided a clear understanding of its benefits compared to 2-dimensional (2D) cephalometric radiographs. However, current "3D hard tissue analyses" continue to rely on 2D linear and angular measurements and do not take advantage of the vast amount of information that can be derived from CBCTs. The long-term objective is to establish a user-friendly true 3D skeletal and dental analysis including quantifiable subnorms with respect to age, gender, and ethnicity. In order to eventually create a comprehensive and effective 3D analysis, it is necessary to first develop a true 3D description of the craniofacial structure that is both accurate and practical for the user. The specific objective of this study is to develop an approach for automatic point acquisition for 3D hard tissue analysis. Materials and Methods: The skeletal boundaries of the maxilla/palate, cranial base/zygoma, and mandible of 24 patient samples were manually plotted in a previous study conducted at UCLA. The same strict inclusion and exclusion criteria was used in both studies, including requirements for patients to be 18+ years old, have a class I skeletal relationship, and mesocephalic pattern and omitting patients with significant craniofacial defects, gross skeletal asymmetry or deformity, or history of orthognathic surgery. An extended form to the Active Shape Model (ASM) was further extended to function in 3D. Using ASM, automatic point acquisition along the boundaries of the maxilla/palate, cranial base/zygoma, and mandible was trained and implemented. A general Procrustes alignment was performed and elliptical-fourier descriptors were computed on both the points automatically plotted ("estimated landmarks") and points manually plotted ("ground-truth landmarks"), which were later compared. Results: An approach for automatic point acquisition on normative 3D CBCT images of the adult craniofacial complex was created. Conclusion: The development of an approach for automatic point acquisition on 3D CBCT images is an essential step towards establishing a true 3D skeletal and dental analysis. While this approach improves practicality by eliminating the need for a user to plot a great number of points thereby eliminating several hours of the user's time, further development of this method is needed to improve its accuracy.
Book Synopsis 3D Diagnosis and Treatment Planning in Orthodontics by : Jean-Marc Retrouvey
Download or read book 3D Diagnosis and Treatment Planning in Orthodontics written by Jean-Marc Retrouvey and published by Springer Nature. This book was released on 2021-03-13 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: This richly illustrated book is a wide-ranging guide to modern diagnostics and treatment planning in orthodontics, which are mandatory prior to the initiation of any type of comprehensive treatment. The importance of three-dimensional (3D) imaging techniques has been increasingly recognized owing to the shortcomings of conventional two-dimensional imaging in some patients, such as those requiring complex adult treatment and those with temporomandibular joint dysfunctions or sleep disturbances. In the first part of this book, readers will find clear description and illustration of the diagnostic role of the latest 3D imaging techniques, including cone beam computed tomography, intra-oral scanning, and magnetic resonance imaging. The second part explains in detail the application of 3D techniques in treatment planning for orthodontic and orthognathic surgery. Guidance is also provided on the use of image fusion software for the purposes of accurate diagnosis and precise design of the most appropriate biomechanical approach in patients with malocclusions.
