Conventional computed tomography (CT) techniques employ a narrow array of x-ray detectors and a fan-shaped x-ray beam to rotate around the patient to produce images of thin sections of the patient. Large sections of the body are covered by moving the patient into the rotating x-ray detector and x-ray source gantry. Cone beam CT is an alternative technique using a large area detector and cone-shaped x-ray beam to produce 3D images of a thick section of the body with one full angle (360 degree or 180 degree plus detector coverage) rotation. It finds applications in situations where bulky, conventional CT systems would interfere with clinical procedures or cannot be integrated with the primary treatments or imaging systems. Cone Beam Computed Tomography explores the past, present, and future state of medical x-ray imaging while explaining how cone beam CT, with its superior spatial resolution and compact configuration, is used in clinical applications and animal research. The book: Supplies a detailed introduction to cone beam CT, covering basic principles and applications as well as advanced techniques Explores state-of-the-art research and future developments while examining the fundamental limitations of the technology Addresses issues related to implementation and system characteristics, including image quality, artifacts, radiation dose, and perception Reviews the historical development of medical x-ray imaging, from conventional CT techniques to volumetric 3D imaging Discusses the major components of cone beam CT: image acquisition, reconstruction, processing, and display A reference work for scientists, engineers, students, and imaging professionals, Cone Beam Computed Tomography provides a solid understanding of the theory and implementation of this revolutionary technology.
The book provides a comprehensive description of the fundamental operational principles, technical details of acquiring and specific clinical applications of dental and maxillofacial cone beam computed tomography (CBCT). It covers all clinical considerations necessary for optimal performance in a dental setting. In addition overall and region specific correlative imaging anatomy of the maxillofacial region is described in detail with emphasis on relevant disease. Finally imaging interpretation of CBCT images is presented related to specific clinical applications. This book is the definitive resource for all who refer, perform, interpret or use dental and maxillofacial CBCT including dental clinicians and specialists, radiographers, ENT physicians, head and neck, and oral and maxillofacial radiologists.
Since its introduction to dentistry, cone beam computedtomography (CBCT) has undergone a rapid evolution and considerableintegration into orthodontics. However, despite the increasingpopularity of CBCT and progress in applying it to clinicalorthodontics, the profession has lacked a cohesive, comprehensiveand objective reference that provides clinicians with thebackground needed to utilize this technology optimally for treatingtheir patients. Cone Beam Computed Tomography inOrthodontics provides timely, impartial, and state-of-the-artinformation on the indications and protocols for CBCT imaging inorthodontics, clinical insights gained from these images, andinnovations driven by these insights. As such, it is the mostcurrent and authoritative textbook on CBCT in orthodontics.Additionally, two DVDs include more than 15 hours of videopresentations on related subjects from the 39th Annual MoyersSymposium and 38th Annual International Conference on CraniofacialResearch. Cone Beam Computed Tomography in Orthodontics is organizedto progress sequentially through specific topics so as to build theknowledgebase logically in this important and rapidly evolvingfield. Part I provides the foundational information on CBCTtechnology, including radiation exposure and risks, and futureevolutions in computed tomography. Part II presents the Principlesand Protocols for CBCT Imaging in Orthodontics, focusing ondeveloping evidence-based criteria for CBCT imaging, themedico-legal implications of CBCT to the professional and theprotocols and integration of this technology in orthodonticpractice. Part III provides critical information on CBCT-basedDiagnosis and Treatment Planning that includes how to interpretCBCT scans, identify incidental pathologies and the possible otheruses of this technology. Part IV covers practical aspects ofCBCT’s Clinical Applications and Treatment Outcomes thatencompasses a range of topics, including root morphology andposition, treatment of impacted teeth, virtual surgical treatmentplanning and outcomes, and more.
Written for the clinician, Cone Beam ComputedTomography helps the reader understand how CBCT machinesoperate, perform advanced diagnosis using CT data, have a workingknowledge of CBCT-related treatment planning for specific clinicaltasks, and integrate these new technologies in dailypractice. This comprehensive text lays the foundation of CBCT technologies,explains how to interpret the data, recognize main pathologies, andutilize CBCT for diagnosis, treatment planning, and execution. Dr.Sarment first addresses technology and principles, radiobiologicrisks, and CBCT for head and neck anatomy. The bulk of the textdiscusses diagnosis of pathologies and uses of CBCT technology inmaxillofacial surgical planning, orthodontic and orthognathicplanning, implant surgical site preparation, CAD/CAM surgicalguidance, surgical navigation, endodontics airway measurements, andperiodontal disease.
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!
Interpretation Basics of Cone Beam Computed Tomography is an easy-to-use guide to Cone Beam CT technology for general dental practitioners and dental students. It covers normal anatomy, common anatomical variants, and incidental findings that practitioners must be familiar with when interpreting CBCT scans. In addition to functioning as an identification guide, the book presents and discusses sample reports illustrating how to use this information in day-to-day clinical practice. Organized by anatomical regions, the book is easy to navigate and features multiple images of examples discussed. It also includes a valuable section on legal issues surrounding this new technology, essential for informed and appropriate use.
This volume provides an overview of X-ray technology and the historical development of modern CT systems. The main focus of the book is a detailed derivation of reconstruction algorithms in 2D and modern 3D cone-beam systems. A thorough analysis of CT artifacts and a discussion of practical issues such as dose considerations give further insight into current CT systems. Although written mainly for graduate students, practitioners will also benefit from this book.
Articles examine cone beam CT imaging, its clinical applications, and risks and liabilities associated with its use.
Trabecular bone structure as well as bone mineral density (BMD) have impact on the biomechanical competence of bone. In osteoporosis-related fractures, there have been shown to exist disconnections in the trabecular network as well as low bone mineral density. Imaging of bone parameters is therefore of importance in detecting osteoporosis. One available imaging device is cone-beam computed tomography (CBCT). This device is often used in pre-operative imaging of dental implants, for which the trabecular network also has great importance. Fourteen or 15 trabecular bone specimens from the radius were imaged for conducting this in vitro project. The imaging data from one dual-energy X-ray absorptiometry (DXA), two multi-slice computed tomography (MSCT), one high-resolution peripheral quantitative computed tomography (HR-pQCT) and four CBCT devices were segmented using an in-house developed code based on homogeneity thresholding. Seven trabecular microarchitecture parameters, as well as two trabecular bone stiffness parameters, were computed from the segmented data. Measurements from micro-computed tomography (micro-CT) data of the same bone specimens were regarded as gold standard. Correlations between MSCT and micro-CT data showed great variations, depending on device, imaging parameters and between the bone parameters. Only the bone-volume fraction (BV/TV) parameter was stable with strong correlations. Regarding both HR-pQCT and CBCT, the correlations to micro-CT were strong for bone structure parameters as well as bone stiffness parameters. The CBCT device 3D Accuitomo showed the strongest correlations, but overestimated BV/TV more than three times compared to micro-CT. The imaging protocol most often used in clinical imaging practice at our clinic demonstrated strong correlations as well as low radiation dose. CBCT data of trabecular bone can be used for analysing trabecular bone properties, like bone microstructure and bone biomechanics, showing strong correlations to the reference method of micro-CT. The results depend on choice of CBCT device as well as segmentation method used. The in-house developed code based on homogeneity thresholding is appropriate for CBCT data. The overestimations of BV/TV must be considered when estimating bone properties in future clinical dental implant and osteoporosis research.