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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 Clément1,2, 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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