Abstract #4063

Saddle Coil Design for MRI/MRS at 14.1 Tesla: A Favorable Alternative to the Quadrature Birdcage Coil

Claudia Christina Zanella¹, Jérémie Daniel Clément^1,2, Daniel Wenz³, Bernard Lanz¹, and Rolf Gruetter¹

¹Laboratory for Functional and Metabolic Imaging (LIFMET), EPFL, Lausanne, Switzerland, ²School of Biomedical Engineering and Imaging, King's College London, London, United Kingdom, ³Center for Biomedical Imaging – Animal and Imaging Technology (CIBM-AIT), EPFL, Lausanne, Switzerland

A single channel ¹H saddle coil and a quadrature ¹H 8-leg birdcage coil were compared in terms of $$$B_1^+$$$ homogeneity and $$$B_1^+$$$ efficiency for preclinical small-animal imaging at 14.1 Tesla. Electromagnetic field simulations showed that the saddle coil generated a more homogeneous $$$B_1^+$$$ field for all regions of interest (up to 13.7 mm central disk diameter) than the birdcage coil. Saline phantom measurements showed a more constant flip angle excitation upon multi-slice imaging in axial direction and a 66% higher $$$B_1^+$$$ efficiency for the saddle coil.

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