A method for preamplifier-decoupling improvement in quadrature phased-array coils
نویسندگان
چکیده
منابع مشابه
Tunable Geometric Decoupling Mechanisms for Phased Array Coils
Introduction: After their introduction by Roemer et al [1], phased array coils have become standard in clinical MR imaging. The development of array coils for small animal MRI is of increasing interest. Field strengths of 4.7T and higher are especially suited for small animal work because of the high SNR offered at these field strengths. Isolation preamplifiers are expensive and not ubiquitous ...
متن کاملA Multichannel Radiofrequency Receiver for MRI Phased Array Coils
The main goal of the project is to develop a VME standard board with two independent radiofrequency inputs. Fast 12 bits A/D converter will digitize each channel at max. rate 40 MHz. After digitalization signal will be down converted by DDC (Harris HSP-50016 Digital Down Converter) with fully programmed intermediate frequency as well as phase. Detected signal from the DDC will be send to TMS320...
متن کاملA Composite Decoupling Method for RF Transceiver Array Coils in MRI
Introduction Although widely embraced in clinical applications, array coils [1] still pose tremendous design challenges due to coupling between coil elements [2]. Several strategies have been proposed for eliminating mutual inductance, such as overlapping [1, 3], orthogonal positioning [3], use of low impedance preamplifiers [1], digital postprocessing [4], capacitive/inductive networks [5] and...
متن کاملA Spatiotemporal Model-Based Method for Dynamic Imaging using Phased Array Coils
D. Xu, L. Ying, Z-P. Liang Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, United States, Department of Electrical Engineering and Computer Science, University of Wisconsin at Milwaukee, Milwaukee, WI, United States INTRODUCTION In dynamic imaging, data are collected in tilted trajectories in k-t space due to time-sequential sampling co...
متن کاملGeometrically Decoupled Phased Array Coils for Mouse Imaging
Introduction: Roemer et al [1] introduced phased array surface coils which offer high SNR over a large field of view. Phased array volume coils, introduced by Hayes et al [2] have high SNR at the surface and centre of the volume. Most array coil designs typically employ a combination of geometrical and additional techniques, such as isolating preamplifiers, for element-to-element decoupling. Th...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Magnetic Resonance Imaging
سال: 2004
ISSN: 1053-1807,1522-2586
DOI: 10.1002/jmri.10449