Solenoidal array coils

New concepts are presented for inherent decoupling of multi‐element solenoidal arrays. First, an uneven counter‐rotational (UCR) coil is reported in which two counter‐rotational sections are wound unevenly, resulting in a quasi‐one‐peak sensitivity profile with a null‐B1 point. Adding a second solen...

Full description

Saved in:
Bibliographic Details
Published in:Magnetic resonance in medicine 2002-04, Vol.47 (4), p.794-799
Main Authors: Su, Sunyu, Zou, Mark Xueming, Murphy-Boesch, Joseph
Format: Article
Language:English
Subjects:
Biological and medical sciences
decoupling
double counter-rotational coil
Equipment Design
Humans
Investigative techniques, diagnostic techniques (general aspects)
Magnetic Resonance Imaging - instrumentation
Magnetic Resonance Imaging - methods
Medical sciences
Miscellaneous. Technology
Radiodiagnosis. Nmr imagery. Nmr spectrometry
RF coil
solenoid array
uneven counter-rotational coil
vertical field MRI
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:New concepts are presented for inherent decoupling of multi‐element solenoidal arrays. First, an uneven counter‐rotational (UCR) coil is reported in which two counter‐rotational sections are wound unevenly, resulting in a quasi‐one‐peak sensitivity profile with a null‐B1 point. Adding a second solenoid element near the null‐B1 point forms an inherently‐decoupled solenoidal array. Unlike a sandwiched solenoidal array, an UCR solenoidal array allows for signal contribution at the center from both solenoid elements. Second, a double counter‐rotational (DCR) coil is presented in which two null‐B1 points are formed by having one counter‐rotational winding on each side of the coil. Two solenoidal elements can be added to form a solenoidal array. Finally, more solenoid elements can be added to the array provided that the added coil elements are DCR elements. These DCR coil elements can be used as building blocks for more complex solenoidal arrays. These concepts are illustrated using numerical simulations and tested using prototype coils. Magn Reson Med 47:794–799, 2002. © 2002 Wiley‐Liss, Inc.
ISSN:0740-3194
1522-2594
DOI:10.1002/mrm.10121