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Showing 1 to 20 of 101 for “"Cone beam computed tomography"”.
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Cone-Beam Computed Tomography and Orthodontics: Awareness Assessment
… community's knowledge and understanding of Cone-Beam Computed Tomography (CBCT) technology as well as awareness of the implications of CBCT use, including risk assessment, radiation dose estimation, diagnostic utility, and issues of informed consent. It is incumbent on the profession to …
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Cone Beam Computed Tomography - radiation dose and image quality assessments
… technologies are available to the dental field, cone beam computed tomography (CBCT) as one of the most important. CBCT is a catch-all term for a technology comprising a variety of machines differing in many respects: patient positioning, volume size (FOV), radiation quality, image capturing and …
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Applications of cone beam computed tomography in radiotherapy treatment planning.
… capable of 2D planar imaging, fluoroscopy and 3D Cone Beam Computed Tomography (CBCT) imaging. With CBCT imaging, the treatment plan can be modified based on patient’s anatomy just before the treatment session. This method of Adaptive Radiotherapy (ART) helps in managing a patient’s treatment by …
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Optimizing Kilovoltage Cone-Beam Computed Tomography for Image-Guided Radiation Therapy
Kilovoltage cone-beam computed tomography (kV CBCT) has important applications in image guided radiation therapy (IGRT). In its current state, CBCT is suboptimal for these applications due to its considerable radiation dose, poor soft-tissue contrast and inaccurate Hounsfield Units as a result of …
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Optimization of Non-Local Means filtration for Cone Beam Computed Tomography
Cone Beam Computed Tomography (CBCT) is a medical imaging technique used to visualize the internals of an object from a set of X-ray images. The X-ray images are taken with a cone shaped X-ray beam at many angles around the object being visualized. The images are then back projected through a …
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Scattered radiation in cone beam computed tomography : analysis, quantification and compensation
… of 3D imaging functionality by means of cone-beam computed tomography (CBCT). With this technique a large number of projections is acquired during a rotation of the C-arm around the patient. Afterwards, these projections are reconstructed to volumetric images using algorithms similar to …
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X-ray Scatter Computation and Simulation in Cone Beam Computed Tomography
In cone beam computed tomography (CBCT) with a large subject volume within the x-ray field, the measured signal can be contaminated by a large amount of scattered photons due to x-ray interactions with the irradiated object. The photon scatter can severely degrade the quality of the reconstructed …
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CONE BEAM COMPUTED TOMOGRAPHY (CBCT) DOSIMETRY: MEASUREMENTS AND MONTE CARLO SIMULATIONS
<p>Cone beam computed tomography (CBCT) is a 3D x-ray imaging technique in which the x-ray beam is transmitted to an object with wide beam geometry producing a 2D image per projection. Due to its faster image acquisition time, wide coverage length per scan, and fewer motion artifacts, the CBCT …
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Improving Cone-Beam Computed Tomography Based Adaptive Radiation Therapy with Deep Learning
… patient anatomy. The widespread availability of cone-beam computed tomography (CBCT) and its capability for the 3D imaging of patient anatomy has made CBCT-based ART an emerging and increasingly popular technology in the field of radiation oncology. However, numerous challenges persist in the …
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Spatial Resolution Analysis of a Variable Resolution X-ray Cone-beam Computed Tomography System
<p>A new cone-beam computed tomography (CBCT) system is designed and implemented that can adaptively provide high resolution CT images for objects of different sizes. The new system, called Variable Resolution X-ray Cone-beam CT (VRX-CBCT) uses a CsI-based amorphous silicon flat panel detector …
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Motion Estimation and Motion-Compensated Reconstruction for Four-Dimensional Cone Beam Computed Tomography (4D-CBCT)
… uncertainty and four dimensional (4D) cone beam computed tomography (CBCT) has been developed to locate tumor in each respiration phase to better estimate the possible motion range of the tumor motion during the treatment. However, 4D-CBCT reconstructed by conventional methods on …
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Sensitivity and Accuracy of Cone Beam Computed Tomography in Diagnosing Osseous Defects at the Mandibular Condyle
Objectives: To assess the ability of using cone-beam computed tomography (CBCT) to diagnose small osseous defects at the mandibular condyle, this study investigated: 1) the impact of defect size and CBCT scan resolutions on the accuracy of qualitative and quantitative diagnoses of condylar defects …
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An automated computer-assisted approximation of the nose in South Africans from CBCT (Cone Beam Computed Tomography) scans
… African population specific standards using Cone Beam Computer-Tomography scans.
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Assessment of imaging dose from the kilovoltage cone beam computed tomography system on board the Varian Halcyon linear accelerator
Daily cone-beam computed tomography (CBCT) is mandatory for cancer patients receiving radiotherapy treatment using advanced techniques on the Varian Halcyon linear accelerator for setup verification, correction, and adaptation of the treatment plan. The frequent nature of imaging sessions mostly …
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The prevalence of second canals in the mesiobuccal root of maxillary molars in a South African subpopulation : a cone beam computed tomography study
… for the detection of multiple canals, whereas cone beam computed tomography (CBCT) has proven to be effective for visualization of additional canals of root canal systems. There is little published data on the prevalence of second canals in the MB roots (MB2) of permanent maxillary first and …
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Peri-Radicular Healing Following Endodontic Microsurgery Grafted with Leukocyte and Platelet Rich Fibrin (L-PRF): One Year Evaluation with Cone Beam Computed Tomography
… (L-PRF) using 2D periapical radiographs and 3D cone-beam computed tomography (CBCT). Methods: Seventy patients (77 surgical sites) were enrolled, of whom 51 cases met the inclusion criteria for analysis and comparison with a historical clinical standard group. Healing outcomes were assessed at …
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Treatment Effects of the Mandibular Anterior Repositioning Appliance (MARA) and Conventional Orthodontic Mechanics on Temporomandibular Joint Morphology: A Comparison Using Cone Beam Computed Tomography
… orthodontic therapy by measuring changes using Cone Beam Computed Tomography (CBCT).</p> <p>Methods: This retrospective study was an analysis of cone beam computed tomography images taken on 65 subjects with Class II division 1 malocclusions at the beginning and end of their comprehensive …
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Comparison of Cone-Beam Computed Tomography (CBCT), Fan-Beam Computed Tomography (FBCT), and Low-Field Magnetic Resonance Imaging (MRI) for Detection of Equine Fetlock Lesions
Computed tomography (CT) and magnetic resonance imaging (MRI) have been increasingly applied to diagnosing lameness localised to the fetlock region in standing horses. A full understanding of the benefits and limitations of CT and MRI for detection of bone and soft tissue lesions is essential for …
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THE USE OF THE CONE-BEAM COMPUTED TOMOGRAPHY FUSION IMAGING AND OF DEDICATED SOFTWARE FOR ABLATION VOLUME PREDICTION IN PERCUTANEOUS MICROWAVE ABLATION OF LIVER PRIMARY TUMORS
… of primary liver tumors that involves the use of cone-beam computed tomography (CBCT), fusion imaging and of a software for ablation volume prediction. Materials and Methods This study included 80 consecutive patients with 101 hepatocellular carcinomas (HCCs) treated with image-guided percutaneous …
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