Results 81 to 90 of about 741,009 (168)

Features X-ray examinations during endodontic treatment

Эндодонтия Today, 2020
The study of the reliability display of root canals of all groups of teeth was carried out in the laboratory by 158 intraoral radiographs, 36 orthopantomogram, 1434 computer tomography. In clinical studies 127 patients analyzed 374 intraoral periapical x-

doaj  

The Non-uniform Fast Fourier Transform in Computed Tomography [PDF]

arXiv, 2016
This project is aimed at designing the fast forward projection algorithm and also the backprojection algorithm for cone beam CT imaging systems with circular X-ray source trajectory. The principle of the designs is based on utilizing the potential computational efficiency which the Fourier Slice Theorem and the Non-uniform Fast Fourier Transform (NUFFT)
arxiv  

Evaluation of dosimetric and spatial accuracy of a virtual cone technique for radiosurgery using linac‐integrated CBCT‐based polymer gel dosimetry

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose This study evaluates the dosimetric and geometric precision of a virtual cone technique using CBCT‐based polymer gel dosimetry, enabling radiation delivery, and imaging readout within an identical spatial coordinate system. Methods We created a C# script for a virtual cone technique that generates a treatment plan with 10 gantry arcs ...
Tenzin Kunkyab, Michael Lamey, Andrew Jirasek, Michael Kudla, Nathan Becker, Benjamin Mou, Derek Hyde   +6 more
wiley   +1 more source

Application of cone-beam computed tomography angiography in a uterine fibroid embolization procedure: A case report

Radiology Case Reports, 2018
One of the main causes of failure in uterine fibroid embolization procedures is incomplete infarction of the fibroid due to alternate vascular supply to the fibroid which was not identified by the operator.
F. Alabdulghani, FFR-RCSI, FRCR, A. O'Brien, D. Brophy, FFR-RCSI, FRCR   +2 more
doaj   +1 more source

Evaluation of the system accuracy of frameless stereotactic radiosurgery using a combination of cone beam CT, six degrees of freedom couch, and surface image‐guided systems

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose This study aims to evaluate the accuracy of the frameless linear accelerator‐based stereotactic radiosurgery (FSRS) system incorporating cone‐beam CT (CBCT), six degrees of freedom (6‐DoF) couch, room laser, and surface image‐guided (SG) systems.
Hao‐Wen Cheng, Jonathan Li, Sheng‐Hsuan Sun, Guanghua Yan, Chihray Liu   +4 more
wiley   +1 more source

X-RAY METHODS OF DIAGNOSING THE ENDOPERIODONTITIS

Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioèlektroniki, 2019
Comparative analysis of the X-ray examination methods revealed the higher informational content of the cone-beam computed tomography up to 5,51±0,61% than the orthopantomography in the diagnosis of endoperiodontitis in patients aged 35-44 years with ...
Y. L. Denisova, N. I. Rosenik, L. A. Denisov   +2 more
doaj  

Juxta-Cortical Chondroma of the Phalanges: Is there a Role for Cone-Beam Computed Tomography in Diagnosis and Local Staging?

Journal of the Belgian Society of Radiology, 2019
Main teaching point: Low-dose cone-beam computed tomography (CT) may be of additional value to radiographs and magnetic resonance imaging (MRI) in preoperative characterization and local staging of juxta-cortical chondroma Juxta-cortical chondroma is a ...
Magdalena Posadzy, Filip Vanhoenacker, Vasiliki Siozopoulou   +2 more
doaj   +1 more source

Fast, automated optimization of virtual monoenergetic images with the dual‐energy image synthesizer for cone‐beam CT

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Background Dual‐energy cone‐beam CT (DE‐CBCT) has become subject of recent interest due to the ability to produce virtual monoenergetic images (VMIs) with improved soft‐tissue contrast and reduced nonuniformity artifacts. However, efficient production and optimization of VMIs remains an under‐explored part of DE‐CBCT's application.
Andrew Keeler, Jason Luce, Mathias Lehmann, John C. Roeske, Hyejoo Kang   +4 more
wiley   +1 more source

Clinical validation of myOSLchip: A beryllium oxide optically stimulated luminescent dosimeter (OSLD) system in radiotherapy dosimetry

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract In radiation oncology, inter‐fractional dosimetry using optically stimulated luminescent detectors (OSLDs) ensures accurate plan delivery and patient safety. RadPro International GmbH's myOLSchip system, featuring a beryllium oxide (BeO) OSL dosimeter, reader, and eraser, was characterized and calibrated with a Varian Truebeam for in‐vivo ...
Heath Davis, Jeffrey V. Siebers, Krishni Wijesooriya, Matt Mistro   +3 more
wiley   +1 more source

Incidental Findings on Cone Beam Computed Tomography Images

International Journal of Dentistry, 2012
Background. Cone beam computed tomography (CBCT) has gained widespread acceptance in dentistry for a variety of applications. Most dentists who are not radiologists/trained in radiology are generally not familiar with interpretation of anatomical ...
Veeratrishul Allareddy, Steven D. Vincent, John W. Hellstein, Fang Qian, Wendy R. K. Smoker, Axel Ruprecht   +5 more
doaj   +1 more source