A hybrid sodium/proton double-resonant transceiver array for 9.4T MRI

High field MRI makes it possible to obtain images of non-proton (X) nuclei due to its increased sensitivity. A double-resonant coil can provide both images of X nucleus and proton without the need to reposition the patient. Most double-resonant coils use lossy trap circuits to minimum interactions b...

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Bibliographic Details
Published in2013 IEEE MTT-S International Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applications (IMWS-BIO) pp. 1 - 3
Main Authors Xinqiang Yan, Lei Shi, Long Wei, Yan Zhuo, Zhou, Xiaohong Joe, Rong Xue
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.12.2013
Subjects
Arrays
Capacitors
co-simulation
Coils
double-resonant coil
Magnetic resonance imaging
MRI
MTL array
phased array
Protons
Radio frequency
Scattering parameters
sodium
ultra-high field
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Summary:High field MRI makes it possible to obtain images of non-proton (X) nuclei due to its increased sensitivity. A double-resonant coil can provide both images of X nucleus and proton without the need to reposition the patient. Most double-resonant coils use lossy trap circuits to minimum interactions between X nucleus and H nucleus. In this study, we propose a hybrid sodium/proton double-tuned transceiver array for 9.4T MRI. The interactions were reduced by hybrid structure without using a lossy circuit. Compared with birdcage or TEM coils, the sensitivity of phased-array was better at the peripheral region of the phantom. For proton imaging at 9.4T, the microstrip transmission line (MTL) array structure was used as coil element for its good performance at ultra-high field. The RF circuit and 3-D EM co-simulation method was used to evaluate the performance of this hybrid double-resonant coil. A practical double-resonant coil with same parameters was built and its feasibility was validated through bench test.
DOI:10.1109/IMWS-BIO.2013.6756178