Title :
SAR reduction for dipole RF coil element at 7 Tesla by using dielectric overlay
Author :
Saleh, G. ; Solbach, Klaus ; Rennings, Andreas ; Chen, Zhe
Author_Institution :
High Freq. Tech. (HFT), Duisburg-Essen Univ., Duisburg, Germany
Abstract :
In this paper, an effective approach based on dielectric overlay is proposed to reduce the specific absorption rate SAR values of strip-line RF coils [2] for 7 Tesla magnetic resonance imaging MRI and to avoid skin burn in ultra-high field MRI. Results show (40-12) % reduction of SAR values when substrates of (10.2-2) dielectric constants have been used.
Keywords :
coils; magnetic resonance imaging; permittivity; strip lines; SAR reduction; dielectric constants; dielectric overlay; dipole RF coil element; magnetic flux density 7 tesla; magnetic resonance imaging; specific absorption rate; strip-line RF coils; Coils; Dielectric substrates; Electric fields; Magnetic resonance imaging; Permittivity; Phantoms; Resonant frequency; magnetic resonance imaging (MRI); specdific absorption rate (SAR); srtrip-line RF coil;
Conference_Titel :
Antennas and Propagation Conference (LAPC), 2012 Loughborough
Conference_Location :
Loughborough
Print_ISBN :
978-1-4673-2218-8
Electronic_ISBN :
978-1-4673-2219-5
DOI :
10.1109/LAPC.2012.6403056
