Title :
A CRLH metamaterial based RF coil element for magnetic resonance imaging at 7 tesla
Author :
Rennings, A. ; Mosig, J. ; Bahr, A. ; Caloz, C. ; Ladd, M.E. ; Erni, D.
Author_Institution :
Gen. & Theor. Electr. Eng. (ATE), Univ. of Duisburg-Essen, Duisburg
Abstract :
The possibility of using composite right/left-handed (CRLH) zeroth-order resonant antennas (ZORAs) in magnetic resonance imaging (MRI) to provide the highly uniform RF magnetic field required for high-quality MRI is explored. A series-mode metal-insulator-metal (MIM) CRLH zeroth-order resonant ldquocoilrdquo (ZORC) element is proposed for this purpose. This ZORC element is shown to provide a very uniform field, appropriate for sagittal or coronal MRI images, and to exhibit a favorable loaded/unloaded Q-factor ratio of around 1/2.
Keywords :
MIM devices; Q-factor; antennas; biomedical MRI; coils; metamaterials; CRLH metamaterial; RF coil element; composite right-left-handed zeroth-order resonant antennas; magnetic resonance imaging; series-mode metal-insulator-metal zeroth-order resonant coil element; uniform RF magnetic field; unloaded Q-factor ratio; Coils; Equivalent circuits; Magnetic fields; Magnetic materials; Magnetic resonance imaging; Metal-insulator structures; Metamaterials; Protons; Q factor; Radio frequency;
Conference_Titel :
Antennas and Propagation, 2009. EuCAP 2009. 3rd European Conference on
Conference_Location :
Berlin
Print_ISBN :
978-1-4244-4753-4
Electronic_ISBN :
978-3-00-024573-2
