Dental CT metal artefact reduction based on sequential substitution

Quantitative evaluation of metal artefact reduction using iterative reconstruction on a clinical Computed Tomography (CT) scanner

Comparison and Combination of Dual-Energy- and Iterative-Based Metal Artefact Reduction on Hip Prosthesis and Dental Implants

PURPOSE To compare and combine dual-energy based and iterative metal artefact reduction on hip prosthesis and dental implants in CT. MATERIAL AND METHODS A total of 46 patients (women:50%,mean age:63±15years) with dental implants or hip prostheses (n = 30/20) were included and examined with a second-generation Dual Source Scanner. 120kV equivalent mixed-images were derived from reconstruction...

Metal Artifact Reduction of Dental Fillings in Head and Neck CT Images

Introduction: The issue of metal artifact and its reduction is as old as the clinical use of computed tomography itself. When metal objects such as dental fillings, hip prostheses or surgical clips are present in the computed tomography (CT) field of view (FOV), make severe artifacts that reduce the image quality and accuracy of CT numbers. They can lead to unreliable ...

CT Reconstruction Using FBP with Sinusoidal Amendment for Metal Artefact Reduction

In this paper, a new method for metal artefact reduction in computed tomography is investigated, based on sinusoidal amendment. Each voxel in the scanned object corresponds to a sinusoidal curve in the projection data set. Some of the sinusoidal curves result from metal implant, which can be identified because the attenuation coefficient of the metal is much higher than that of human tissue, an...

An experimental survey of metal artefact reduction in computed tomography.

We present a survey of techniques for the reduction of streaking artefacts caused by metallic objects in X-ray Computed Tomography (CT) images. A comprehensive review of the existing state-of-the-art Metal Artefact Reduction (MAR) techniques, drawn predominantly from the medical CT literature, is supported by an experimental comparison of twelve MAR techniques. The experimentation is grounded i...