Concepts in Magnetic Resonance Part B: Magnetic Resonance Engineering This is an RSS file. You can use it to subscribe to this data in your favourite RSS reader or to display this data on your own website or blog.

The magnet system for rapid scan electron paramagnetic resonance imaging and spectroscopy
Abstract The magnet and gradient systems suitable for electron paramagnetic resonance imaging experiments at RF range are presented. The air‐core magnet based on the Helmholtz design in the article has a unique conical shape. A comprehensive study regarding the coils adjustment providing for the maximum field homogeneity is given. The z gradient is a four‐coil system (seventh order), the transverse gradients are Golay coils (fifth order), and the scan system is the Helmholtz coil (fourth order). The magnet generates continuously a field of 37 mT (370 G), and the orthogonal gradient coils are designed to yield 100 mT/m ...
Source: Concepts in Magnetic Resonance Part B: Magnetic Resonance Engineering - February 25, 2013 Category: Radiology Authors: Tomasz Czechowski, Wojciech Chlewicki, Mikolaj Baranowski, Kazimierz Jurga, Eugeniusz Szczesniak, Marek Szostak, Pawel Malinowski, Piotr Kedzia, Piotr Szczepanik, Piotr Szulc, Stanislaw Wosinski, Wieslaw Prukala, Jan Jurga Tags: Research Article Source Type: research

Analysis of circumferential shielding as a methodto decouple radiofrequency coils for high‐field MRI
This study is focused on methodically analyzing this decoupling method to determine the effect of shielding geometry on overall coil performance in high‐field MRI. To this end, experiments on a 7‐Tesla MRI system, as well as full‐wave electromagnetic simulations, were performed and performance metrics, such as Q‐factor, power efficiency, transmit power, signal‐to‐noise ratio (SNR), and specific absorption rate (SAR), were investigated for different coil/shield configurations. Differences in the geometry of a RF coil and its respective shield resulted in an increase in peak SNR of up to 40% compared to an unshie...
Source: Concepts in Magnetic Resonance Part B: Magnetic Resonance Engineering - February 25, 2013 Category: Radiology Authors: Jean‐Guy Belliveau, Kyle M. Gilbert, MOHAMED Abou‐Khousa, Ravi S. Menon Tags: Research Article Source Type: research

Optimization of the radiative antenna for 7‐T magnetic resonance body imaging
Abstract Magnetic resonance prostate imaging at 300 MHz is complicated by the effects arising from the short RF wavelength in biological tissue. A radiative antenna leads to a better RF signal penetration for sites located at one or more wavelengths depth, i.e. beyond the near zone. It consists of a dipole antenna placed on a high‐dielectric substrate. The effects of changes in substrate dimensions and relative permittivity upon the electromagnetic fields, the B efficiency and the Poynting vector at 10 cm depth are investigated for a realistic body phantom by using electromagnetic simulations. A high relative permittivit...
Source: Concepts in Magnetic Resonance Part B: Magnetic Resonance Engineering - February 25, 2013 Category: Radiology Authors: Ozlem Ipek, Alexander Raaijmakers, Jan Lagendijk, Peter Luijten, Cornelis van den Berg Tags: Research Article Source Type: research

Editorial Board
(Source: Concepts in Magnetic Resonance Part B: Magnetic Resonance Engineering)
Source: Concepts in Magnetic Resonance Part B: Magnetic Resonance Engineering - February 1, 2013 Category: Radiology Tags: Editorial Board Source Type: research