PURPOSE The potential of keV cone beam computed tomography (CBCT) for guiding adaptive replanning is well-known. There are impediments to this, one being CBCT number accuracy. The purpose of this study was to investigate CBCT number correction methods and the affect of residual inaccuracies on dose deposition. Four different correction strategies were applied to the same patient data to compare...

This article reviews the various clinical applications of cone-beam computed tomography (CBCT). A literature search was conducted via PubMed for publications related to dental applications of CBCT published between January 1998 and June 15, 2010. The search revealed a total of 540 articles, 129 of which were clinically relevant and analyzed in detail. A literature review demonstrated that CBCT ...

kV-CBCT integrated with linear accelerators as a tool for IGRT, was developed to acquire online volumetric and anatomical images (Xing 2006). The successful implementation of CBCT requires a quality assurance (QA) program that not only involves robust and intuitive quality control checks of the equipment, but also thoughtful image-guidance processes based on measurement of positional uncertaint...

PURPOSE To demonstrate the feasibility of reconstructing a cone-beam CT (CBCT) image by deformably altering a prior fan-beam CT (FBCT) image such that it matches the anatomy portrayed in the CBCT projection data set. METHODS A prior FBCT image of the patient is assumed to be available as a source image. A CBCT projection data set is obtained and used as a target image set. A parametrized defo...

Background and Purpose:  Due to the important role of imaging in the diagnosis and treatment plan in orthodontics, CBCT (Cone Beam Computed Tomography) images because of their three-dimensional nature, can minimize the disadvantages of two-dimensional images such as magnification, distortion, or superimposition. The purpose of this study was to evaluate the accuracy of conventional cephalograms...

BACKGROUND C-arm cone-beam computed tomography (CBCT) is a comparatively novel modality for guiding percutaneous transthoracic lung biopsies (PTLBs), and despite its potential advantages over conventional computed tomography (CCT), a head-to-head comparison of the two techniques has yet to be reported in the literature. This study aims to evaluate the diagnostic value and safety of CBCT-guided ...

INTRODUCTION The aim of this study was to evaluate the accuracy of two imaging methods in diagnosing apical periodontitis (AP) using histopathological findings as a gold standard. METHODS The periapex of 83 treated or untreated roots of dogs' teeth was examined using periapical radiography (PR), cone-beam computed tomography (CBCT) scans, and histology. Sensitivity, specificity, predictive va...

Objective: Having detailed knowledge about the anatomical structure of mandible is important for anthropologists, forensic scientists and reconstructive surgeons. There are several imaging modalities visualizing the mandibular morphology. Cone Beam Computed Tomography (CBCT) is a developing technique that is being increasingly used in dento-maxillo-facial imaging due to its relatively low dose ...

OBJECTIVES To develop a novel technique to visualize dentogingival profiles by using cone beam computed tomography (CBCT) and to evaluate the accuracy of mucogingival tissue thickness measurements with CBCT, as compared with direct measurements in vitro. METHODS A silicone matrix loaded with radiopaque impression material was prepared before performing CBCT on a patient. Two dry cadaver mandi...

BACKGROUND To study the impact of target motion in kV-CBCT imaging. MATERIAL/METHODS To simulate the respiratory movement, dynamic phantom was programmed to move in three-dimension with a period of four seconds and of two different amplitudes (PA1 and PA2). The targets of well defined geometries (cylinder, sphere, solid triangle, U-shaped and dumbbell) were made using wax. The static targets ...