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Abstract #4103

Numerical evaluation of a domed and folded two-ring birdcage coil for 1H/31P at 3T MRI

Suk-Min Hong1, Chang-Hoon Choi1, Jörg Felder1, and N. Jon Shah1,2,3,4
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

For double-frequency coils, it has been shown that four-ring birdcage coils provide minimum losses at X-nuclei frequencies. However, to avoid coupling between two rings, the length of the outer parts needs to be extended, increasing the unusable area at the service-end. In this study, we redesigned one side of the conventional birdcage coil as a dome shape by using end-caps. The domed birdcage coil was evaluated in simulations in both the single- and double-tuned condition. The performance of the folded-ring, domed and double-tuned birdcage coil was also evaluated and compared to that of a conventional single-tuned birdcage coil.

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