Abstract Lenslet array near-eye displays are a revolutionary technology that generates virtual image in the field of view observer. Although this is advantageous creating compact displays, undesirable artifacts occur when user pupil moves outside practical movable region (PPMR). Even with dynamic updating based on eye-tracking techniques, can still be perceived human eyes turn rapidly. To enlar...

Combined EEG/fMRI recording has been used to localize the generators of EEG events and to identify subject state in cognitive studies and is of increasing interest. However, the large EEG artifacts induced during fMRI have precluded simultaneous EEG and fMRI recording, restricting study design. Removing this artifact is difficult, as it normally exceeds EEG significantly and contains components...

Purpose To determine if metal artifact reduction can minimize magnetic susceptibility artifacts in the orbits for an eye plaque brachytherapy patient with metallic dental braces. Material and methods A 62-year-old female patient with a choroidal melanoma in the right eye received a 1.5 T magnetic resonance imaging (MRI) simulation for 3D eye plaque brachytherapy planning. The protocol include...

BACKGROUND Metal objects implanted in the bodies of patients usually generate severe streaking artifacts in reconstructed images of X-ray computed tomography, which degrade the image quality and affect the diagnosis of disease. Therefore, it is essential to reduce these artifacts to meet the clinical demands. METHODS In this work, we propose a Gaussian diffusion sinogram inpainting metal arti...

Due to its convenient, low physical restraint, and electric noise tolerant features, functional near-infrared spectroscopy (fNIRS) is expected to be a useful tool in monitoring users’ brain activity in HCI. However, fNIRS measurement suffers from various kinds of artifacts, and no standardized method for artifact reduction has been established so far. In this study, we compared high-pass/band-p...

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 ...

Compressed sensing (CS), a reconstruction method for undersampled MR data, was recently introduced [1]. Since only undersampled data are acquired, CS allows a significant reduction in the time needed for MR experiments. The basic requirement for CS, however, is sparsity in the data. The lack of F background signal in living tissue leads to an intrinsically sparse signal distribution in the F im...

OBJECTIVE The aim of this study was to compare the degree of artifact reduction in magnetic resonance imaging achieved with slice encoding for metal artifact correction (SEMAC) in combination with view angle tilting (VAT) and multiacquisition variable resonance image combination (MAVRIC) for standard contrast weightings and different metallic materials. METHODS Four identically shaped rods ma...

Introduction: Navigators can effectively track rigid-body motion of limited amplitude, such as respiratory motion [1,2,3]. In a Cartesian scan, data is corrected by applying to each k-space line the phase modulation corresponding to the amount of detected motion. However, lines associated with significant motion (e.g., swallowing in larynx imaging) are uncorrectable and therefore need to be dis...