magnitude (Mxy/M0) generated by AFPSFS/AFS pulse trains as a function of RF offset Figure 2. Contrast generated by AFP-SFS/AFS pulse trains as a function of TE for the phantom. Figure 3. Phantom and mouse brain images collected using AFP-SFS-SE (A, C) and AFP-AFS-SE (B, D) pulse sequences at TE = 80 ms (A, B) and TE = 49 ms (C, D). Image Contrast Enhancement using Selective Adiabatic Pulses tha...

The development of software for the simulation of NMR experiments has increased at an enormous pace in the last decade. Its usefulness has spread far beyond the analysis of lineshapes and spectra. Today, search-and-optimize strategies are used to develop new pulse sequences while other programs measure the performance of pulse sequences on spin systems of interest [1, 2]. Up to now, most of the...

Weighting is the term most frequently used to describe magnetic resonance pulse sequences and the concept most commonly used to relate image contrast to differences in magnetic resonance tissue properties. It is generally used in a qualitative sense with the single tissue property thought to be most responsible for the contrast used to describe the weighting of the image as a whole. This articl...

We reveal that a synthetic photonic lattice based on coupled optical loops can be utilized as feed-forward neural network for processing of pulse sequences in time domain. As proof concept, we train the system to restore an initial shape from signal distorted due linear dispersion fiber-optic link. also show efficient training with intrinsic Kerr-type nonlinearity realization target nonlinear t...

Sequences with good correlation properties are in general required in various applications such as radar, sonar, spread spectrum and multiple access communication. The optimal sequences are the ones whose peak sidelobe of the aperiodic autocorrelation function is the minimum possible for a given sequence length. A chaotic sequence that provides auto and cross-correlation properties that are sim...

This paper presents a simple but efficient algorithm for deinterleaving of periodical pulse sequences. Based upon time of arrival analysis, one or more pulse repetition intervals are determined from the sequential difference histogram just by detecting the maximum value in the histogram. The algorithm is compared to some typical signal sorting methods and implemented in C language program. It i...

PURPOSE To assess the usefulness of fluid-attenuated inversion recovery (FLAIR) and constructive interference in steady state (CISS) sequences in depicting epidermoid tumors. METHODS Six patients with surgically confirmed epidermoid tumors in the subarachnoid space were examined with T1-weighted MR imaging with a spin-echo sequence, and with T2- and proton density-weighted imaging with a fast...

Fourphase codes have been widely used in radar and communication areas, but the synthesis of Fourphase codes with good merit factor is a nonlinear multivariable optimization problem, which is usually difficult to tackle. To get the solution of above problem many global optimization algorithms like genetic algorithm, simulated annealing, and tunneling algorithm were reported in the literature. H...

A general strategy to maintain the coherence of a quantum bit is proposed. The analytical result is derived rigorously including all memory and backaction effects. It is based on an optimized pi-pulse sequence for dynamic decoupling extending the Carr-Purcell-Meiboom-Gill cycle. The optimized sequence is very efficient, in particular, for strong couplings to the environment.