High-Frequency Field-Sensing Coils Using Microstrip Lines.

High-Throughput RF Coils for High-Field MRI

Improvements in signal to noise ratio (SNR) and ease of use of magnetic resonance imaging (MRI) rf coils are needed to improve image quality and patient throughput in high-field MRI. The goal of this Phase II project is to continue the development of novel rf coil topologies and rf balancing circuits that have demonstrated substantially improved technical performance, reduced cost, and greatly ...

Compact Dual-Frequency Microstrip Antenna Array with Increased Isolation Using Neutralization Lines

An effective technique utilizing neutralization lines to increase the isolation of a compact two-element dual-frequency microstrip antenna array is proposed in this paper. Two neutralization lines connect the two elements at the edge of each radiating patch. The positions and lengths of the two neutralization lines are studied to get the best performance of element isolation. A prototype of the...

Em Field Coupling to Non-uniform Microstrip Lines Using Coupled Multi-conductor Strips Model

Abstract—A model for the two-dimensional analysis of microstrip lines, named Rigorously Coupled Multi-conductor Strip (RCMS) is introduced. In this model, the width of the strip of a microstrip line is subdivided into a large number of rigorously coupled narrow strips. So, a microstrip line can be considered as a coupled multi-conductor transmission line. Determination of the capacitance and in...

Comparison of B1 Field Homogeneity for Shielded Birdcage, TEM and Microstrip Volume Coils at 300MHz

Introduction: Because of the inherent advantage of improved SNR, ultra-high field (3T~9.4T) MRI technology and applications have been accelerated these years. However many engineering challenges have arisen from high-operation frequencies. One major challenge is the difficulty of designing large-size RF coils with high-resonance frequencies. In addition, it has been shown that the homogeneity o...

The Behaviour of Induction Coils in the High Frequency Range