introduction : one of the key factors in successful endodontic therapy is to adequately fill the root canals. the aim of this in vitro study was to compare the quality of four different root canal obturation techniques: cold lateral condensation (clc), warm vertical condensation (wvc), obtura ii (oii) and gutta flow (gf) by using micro-computed tomography (micro ct). materials and methods: a to...

Helical computed tomography (CT) scans are often performed to obtain three-dimensional images of an object that is longer than the detector. However, existing quasi-exact and exact reconstruction methods, such as re-binning Katsevich algorithm, generate interpolation errors or require high computational power. In this work, we propose a method reconstruct helical CT projections by iteratively r...

Due to the great number of structures in the maxillofacial region, cone-beam computed tomography (CBCT) is an important procedure in presurgical planning for removal of impacted teeth. Most of the information provided by this imaging technique cannot be visualized in conventional radiographs. In addition, CBCT reduces patient exposure to radiation in comparison with helical computed tomography ...

To retrospectively evaluate the clinical efficacy of triphasic computed tomography during arterial portography (CTAP) for a pretreatment survey of patients with suspected hepatocellular carcinoma (HCC) and to compare the dynamic image features of HCCs and pseudolesions during triphasic CTAP. Between May 2007 and September 2010, 129 patients with known or suspected HCC underwent triphasic helica...

We propose a workflow based on a combination of computed tomography, 3D images and 3D printing to analyse different archaeological material dating from the Iron Age, a weight axis, a helical piece, and a fibula. This workflow enables a preservative analysis of the artefacts that are unreachable because encased either in stone, corrosion or ashes. Computed tomography images together with 3D prin...

The incidence of venous thromboembolic diseases is increasing as the U.S. population ages. At least one established risk factor is present in approximately 75 percent of patients who develop these diseases. Hospitalized patients and nursing home residents account for one half of all cases of deep venous thrombosis. A well-validated clinical prediction rule can be used for risk stratification of...

INTRODUCTION AND OBJECTIVES Multislice computed tomography is an excellent technique for the detection of significant coronary artery lesions. Our purpose was to assess whether computed tomography could replace routine invasive coronariography before valvular surgery. METHODS We studied 106 consecutive patients (mean age: 67 [10]): 76% aortic valvular disease (62% stenosis, 14% regurgitation)...