Conventional radiographic techniques depend on attenuation, which provides low contrast between soft tissues. However, X rays can accumulate large differential phase delays even in weakly absorbing materials. This can produce significantly higher contrast. One technique for taking advantage of phase effects, propagation-based phase imaging, can yield marked edge enhancement but requires spatial...

This article presents a new subspace-based technique for reducing the noise of signals in time-series. In the proposed approach, the signal is initially represented as a data matrix. Then using Singular Value Decomposition (SVD), noisy data matrix is divided into signal subspace and noise subspace. In this subspace division, each derivative of the singular values with respect to rank order is u...

conclusions the effect of coadministration of nac and coq10 was neither additive nor synergic in protecting against nihl. results the temporary hearing changes that occurred 1-day post exposure were not significantly different in all groups (p > 0.05). the total recovery (between 1 - 21 days after noise exposure) varied by a frequency increase between 1.08 - 19.10 in the noise group compared to...

  The advent of dual-modality PET/CT imaging has revolutionized the practice of clinical oncology, cardiology and neurology by improving lesions localization and the possibility of accurate quantitative analysis. In addition, the use of CT images for CT-based attenuation correction (CTAC) allows to decrease the overall scanning time and to create a noise-free attenuat...

A problem in power line communications (PLC) is the time-varying characteristics of the channel and the noise. Robust communication methods are therefore considered as possible candidates for PLC, see e.g. references m [6]. At the receiver, robust detection techniques are of interest, and one important issue is the amount of knowledge about the channel that is needed in the receiver. Non-cohere...