Paper Info
Title
Analysis of the noise correlation in MRI coil arrays loaded with metamaterial magnetoinductive lenses.
Abstract
A numerical method is shown for calculating the noise correlation coefficient in arrays of magnetic resonance imaging (MRI) coils loaded with capacitively-loaded ring metamaterial lenses, and in the presence of a conducting half-space resembling a sample. This numerical method is validated by comparison with experimental results obtained in two different experimental procedures for double check: noise resistance measurements with a network analyzer and noise correlation measurements in an MRI system. It is found that, for practical array configurations such as overlapping coils or capacitively-decoupled coils, the noise correlation coefficient turns negative for coils loaded with metamaterial lenses. In particular, the analysis is carried out with metamaterial structures known as magnetoinductive lenses, which have been demonstrated in previous works to improve the signal-to-noise ratio of MRI coils. Results are also shown to demonstrate that negative noise correlations have as an effect the improvement of the g-factor in coil arrays for parallel MRI.
Year
DOI
Venue
2015
10.1109/TMI.2014.2377792
IEEE transactions on medical imaging
Keywords
Field
DocType
magnetic resonance imaging,metamaterials,parallel imaging,numerical method,g factor,signal to noise ratio,network analyzer,lenses,correlation,numerical analysis
Network analyzer (electrical),Double check,Lens (optics),Artificial intelligence,Metamaterial,Computer vision,Signal-to-noise ratio,Optics,Electromagnetic coil,Numerical analysis,Nuclear magnetic resonance,Mathematics,Magnetic resonance imaging
Journal
Volume
Issue
ISSN
34
5
0278-0062
Citations 
PageRank 
References 
1
0.40
1
Authors
4
Name
Order
Citations
PageRank
Jose M. Algarin110.73
Felix Breuer210.40
Volker C Behr3102.39
Manuel J. Freire431.69