B. Reduction in Saddle-Type Coil Size 5 C. Solenoidal Coils and Magic Angle Spinning 5 D. Microcoils 6 E. Microfabrication 7 F. Direct Comparisons of Probe Sensitivity 8 V. Microliter-Volume Static NMR Spectroscopy 9 A. Natural Product Extracts 9 B. Analysis of Combinatorial Chemistry Products 10 VI. Nanoliter-Volume Static NMR Spectroscopy 10 VII. NMR Detection of Capillary Separations 12 A. F...

Introduction: A multi-port array coil provides individual RF field profiles that, under the static control of B1 shimming coefficients or dynamic control of parallel RF pulses, are weighted and superimposed to create the RF field. The coil therefore plays a central role in the induction of a temporally/spatially varying B1 field for creating an excitation profile, and meanwhile, a concomitant E...

Introduction: One of the major causes of image non-uniformity in MRI is due to the existence of  non-homogeneity in RF receive and transmit. This can be the most effective source of error in  quantitative  studies  in  MRI  imaging.  Part  of  this  non-homogeneity  demonstrates  the  characteristics of RF coil and part of it is due to the interaction of RF field with the material being  imaged...

When a momentary large current in opposite directions flows through the two opposing spiral coils, strong magnetic field is generated coils. The creates an impact force between permanent magnet placed under of actuator enhanced because Lorentz by static field. In this paper, we introduce principle electromagnetic generation and calculation method force. fields coil are analyzed finite element m...

Measurements of scattered light intensity as a function of angle (often called differential [l] or total intensity light scattering) from an eluting sample separated into its particulate/molecular constituents by various chromatographic means permit the improvement of subsequent analyses {in the Rayleigh-Gans-Debye (RGD) approximation [2]} in three distinct ways. First, the ability to make repe...

Introduction As B0 field strengths increase, there is an almost linear increase in SNR. However, new problems arise at higher field strengths, such as a higher SAR and B1-field inhomogeneity. To counteract these problems, multiple transmit channels are necessary to improve the image homogeneity, this can be achieved with static RF-shimming [1]. In this work, a new transceive surface coil array ...

this paper presents a new method called vespiary regular hexagonal (vrh) model to calculate parasitic capacitance between conductor wire filaments of one turn of a coil and between conductor wires filament and liner and also total capacitance of n-turns having single-layers, multi-conductor wire filaments of the helix magneto cumulative generator (mcg) coil. the presented method is an analytica...

With the development of pipeline networks, many safety accidents were caused by stress concentration; it is great significance to accurately monitor state for maintaining safety. In this paper, based on alternating current measurement (ACSM) methods, a 3D simulation model electromagnetic field was established ANSYS software. The distribution law magnetic and eddy analyzed, influence size struct...