alexa Higher-order harmonic transmission-line RF coil design for MR applications.


OMICS Journal of Radiology

Author(s): Zhang X, Zhu XH, Chen W

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Abstract A novel concept based on the use of higher-order harmonic resonances in a transmission-line resonator is introduced for the design of high-frequency RF coils at high and ultrahigh fields, where conventional RF coil designs present difficulties and limitations. To demonstrate this concept, we successfully designed and fabricated a 400-MHz RF coil for rat imaging using a second-harmonic resonant microstrip transmission line. This coil has a high Q-factor, reduces coil-cable interactions without the use of a matching balun, and has a broad range for tuning the coil's resonant frequency at the loaded condition. This work demonstrates that the use of higher-order harmonics in a transmission-line resonator provides an alternative, efficient approach to the design of large and high-frequency RF coils. Copyright 2005 Wiley-Liss, Inc. This article was published in Magn Reson Med and referenced in OMICS Journal of Radiology

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