BACKGROUND AND PURPOSE Flat detector CT has been increasingly used as a follow-up examination after endovascular intervention. Metal artifact reduction has been successfully demonstrated in coil mass cases, but only in a small series. We attempted to objectively and subjectively evaluate the feasibility of metal artifact reduction with various metallic objects and coil lengths. MATERIALS AND ...

In computed tomography (CT), metal implants increase the inconsistencies between the measured data and the linear assumption made by the analytical CT reconstruction algorithm. The inconsistencies appear in the form of dark and bright bands and streaks in the reconstructed image, collectively called metal artifacts. The standard method for metal artifact reduction (MAR) replaces the inconsisten...

Due to their high and variable coordination numbers leading to poorly predictable three-dimensional coordination spheres, the trivalent lanthanide metal ions are challenging molecular objects for introduction into thermotropic liquid crystals. Conversely, their predictive electronic, optical and magnetic metal-centred properties make them particularly attractive for being incorporated into swit...

This document discusses the design of our Knight Sweeper vehicle. Knight Sweeper is an autonomous vehicle designed to detect any metallic objects and avoid obstacles during its route of navigation. Once detection occurs the vehicle is designed to identify region of detection and avoid collision with the actual metallic object or obstacle in its way. Knight Sweeper will be able to operate in a m...

This paper introduces a novel method for the quality evaluation of resistance spot welds. The evaluation is based on computer vision methods, which allow nondestructive on-line real-time processing. The input of the system is the image of a weld imprint on a metal band which covers the electrodes against wear and soiling. In order to find the position of the resistance spot welds, we describe a...

Surfactant micelles (cetyltrimethylammonium chloride) adsorbed on Au(111) exhibit orientational order dictated by the gold crystal axes. To explain this phenomenon, we take into account the ionic contribution to the dielectric response of the metal. Since the motion of an ion inside the metallic lattice is restricted by its neighbors in an anisotropic way, the total dielectric response of the m...

In 3 dimensions, it is possible to identify a wide range of systems such as (i) nanoparticles in solutions forming ferrofluids, (ii) percolating phases as found in manganites for example, (iii) magnetic domains or domain walls in crystals, (iv) long range helical structures as found in MnSi or BiFeO3 for example. These objects are ideally studied using Small Angle Neutron Scattering (SANS) whic...

Eighteen candidates for emission line galaxies were discovered in a narrow-band infrared survey that targeted the redshifts of damped Ly α or metal lines in the spectra of quasars. The presence of emission lines is inferred from the photometric magnitudes in narrow and broad band interference filters, corresponding to H α at redshifts of 0.89 (6 objects) and 2.4 (10 objects), and [OII]λ3727 at ...

Molecular Recognition Devices (MRD) such as sensors and biosensors have a great application potential for clinical, biomedical, and environmental research fields. The use of Nanometer-sized Metal Particles (MNP) in MRD construction can substantially improve their performance. MNP are objects of great interest in modern chemical research due to their unique physical and chemical properties, whic...

an action resulting from an object like human's damaging action can cause liability for those who possess them. the french civil law at its approval time (1804) had not predicted this principle and just in articles 1385, 1386, the liability of damages resulting from two types of objects, i.e. animals and buildings due to imposing great damages by them had been predicted by french law. howe...