Comparison of three commercially available radio frequency coils for human brain imaging at 3 Tesla.

Details

Ressource 1Download: serval:BIB_43492BB35402.P001 (477.38 [Ko])
State: Public
Version: author
License: Not specified
It was possible to publish this article open access thanks to a Swiss National Licence with the publisher.
Serval ID
serval:BIB_43492BB35402
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Comparison of three commercially available radio frequency coils for human brain imaging at 3 Tesla.
Journal
Magma
Author(s)
Mekle R., van der Zwaag W., Joosten A., Gruetter R.
ISSN
0968-5243 (Print)
ISSN-L
0968-5243
Publication state
Published
Issued date
2008
Volume
21
Number
1-2
Pages
53-61
Language
english
Notes
Publication types: Comparative Study ; Journal ArticlePublication Status: ppublish
Abstract
OBJECTIVE: To evaluate a transverse electromagnetic (TEM), a circularly polarized (CP) (birdcage), and a 12-channel phased array head coil at the clinical field strength of B0 = 3T in terms of signal-to-noise ratio (SNR), signal homogeneity, and maps of the effective flip angle alpha. MATERIALS AND METHODS: SNR measurements were performed on low flip angle gradient echo images. In addition, flip angle maps were generated for alpha(nominal) = 30 degrees using the double angle method. These evaluation steps were performed on phantom and human brain data acquired with each coil. Moreover, the signal intensity variation was computed for phantom data using five different regions of interest. RESULTS: In terms of SNR, the TEM coil performs slightly better than the CP coil, but is second to the smaller 12-channel coil for human data. As expected, both the TEM and the CP coils show superior image intensity homogeneity than the 12-channel coil, and achieve larger mean effective flip angles than the combination of body and 12-channel coil with reduced radio frequency power deposition. CONCLUSION: At 3T the benefits of TEM coil design over conventional lumped element(s) coil design start to emerge, though the phased array coil retains an advantage with respect to SNR performance.
Keywords
Algorithms, Artifacts, Brain/pathology, Brain Mapping/methods, Diagnostic Imaging/instrumentation, Diagnostic Imaging/methods, Electromagnetic Phenomena, Humans, Image Processing, Computer-Assisted, Magnetic Resonance Imaging/instrumentation, Magnetic Resonance Imaging/methods, Phantoms, Imaging, Radiation, Radio Waves, Sensitivity and Specificity, Signal Processing, Computer-Assisted, Software
Pubmed
Web of science
Open Access
Yes
Create date
04/08/2010 15:28
Last modification date
01/10/2019 6:17
Usage data