Independent Component Analysis for noise and artifact removal in Three-dimensional Polarized Light Imaging

Motion artifact removal and signal enhancement to achieve in vivo dynamic full field OCT

We present a filtering procedure based on singular value decomposition to remove artifacts arising from sample motion during dynamic full field OCT acquisitions. The presented method succeeded in removing artifacts created by environmental noise from data acquired in a clinical setting, including in vivo data. Moreover, we report on a new method based on using the cumulative sum to compute dynamic images from raw signals, leading to a higher signal to noise ratio, and thus enabling dynamic imaging deeper in tissues.

一种用于呼吸运动分辨多回波3D锥形MRI欠采样伪影去除的新型低秩张量方法

A Novel Low-Rank Tensor Method for Undersampling Artifact Removal in Respiratory Motion-Resolved Multi-Echo 3D Cones MRI

本研究提出一种低秩张量方法，通过构建三阶图像张量利用低秩结构去除呼吸运动分辨多回波3D锥形MRI的欠采样伪影，在志愿者与患者实验中验证有效，且重建速度比常规压缩感知方法至少快三倍。

Surrogate-based artifact removal from single-channel EEG

The recent emergence and success of electroencephalography (EEG) in low-cost portable devices, has opened the door to a new generation of applications processing a small number of EEG channels for health monitoring and brain-computer interfacing. These recordings are, however, contaminated by many sources of noise degrading the signals of interest, thus compromising the interpretation of the underlying brain state. In this work, we propose a new data-driven algorithm to effectively remove ocular and muscular artifacts from single-channel EEG: the surrogate-based artifact removal (SuBAR). Metho…

基于正弦图中条纹分类与去除的X射线计算机断层扫描环状伪影校正方法

Ring artifacts correction method in x-ray computed tomography based on stripe classification and removal in sinogram images

提出基于正弦图条纹分类与去除的CT环状伪影校正方法，结合中值滤波与多相分解，经模拟和实验数据验证，有效提升图像质量。

Gibbs-Ringing Artifact Removal Based on Local Subvoxel-shifts

Gibbs-ringing is a well known artifact which manifests itself as spurious oscillations in the vicinity of sharp image transients, e.g. at tissue boundaries. The origin can be seen in the truncation of k-space during MRI data-acquisition. Consequently, correction techniques like Gegenbauer reconstruction or extrapolation methods aim at recovering these missing data. Here, we present a simple and robust method which exploits a different view on the Gibbs-phenomena. The truncation in k-space can be interpreted as a convolution with a sinc-function in image space. Hence, the severity of the artifa…

Hybrid Wavelet and EMD/ICA Approach for Artifact Suppression in Pervasive EEG

Electroencephalogram (EEG) signals are often corrupted with unintended artifacts which need to be removed for extracting meaningful clinical information from them. Typically a priori knowledge of the nature of the artifacts is needed for such purpose. Artifact contamination of EEG is even more prominent for pervasive EEG systems where the subjects are free to move and thereby introducing a wide variety of motion-related artifacts. This makes hard to get a priori knowledge about their characteristics rendering conventional artifact removal techniques often ineffective. In this paper, we explore…