Abstract #4051

Design and evaluation of a dual-tuned circular dipole antenna up to 14T MRI

Suk-Min Hong¹, Chang-Hoon Choi¹, Jörg Felder¹, and N. Jon Shah^1,2,3,4

¹Institute of Neuroscience and Medicine 4, INM-4, Forschungszentrum Jülich, Jülich, Germany, ²Institute of Neuroscience and Medicine 11, INM-11, JARA, Forschungszentrum Jülich, Jülich, Germany, ³JARA - BRAIN - Translational Medicine, Aachen, Germany, ⁴Department of Neurology, RWTH Aachen University, Aachen, Germany

When the field strength of MRI is increased to 14T, the capacitor values required to tune a conventional loop coil become extremely small. For 7T MRI, the circular dipole antenna has been introduced and evaluated as the array structure and new decoupling method. In this study, we modified a circular dipole antenna to a dual-tuned circuit by using an LC trap. The coil operates as a circular dipole antenna for the proton signal as the trap blocks ¹H current and operates as a conventional loop at the X-nuclei frequency. The dual-tuned circular dipole antenna was evaluated up to 14T frequency.

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