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Purpose: High-permittivity materials in the form of flexible 'dielectricpads' have proved very useful for addressing RF inhomogeneities in high fieldMRI. Finding the optimal design of such pads is however a tedious task,reducing the impact of this technique. In this work we present an easy to usesoftware tool which allows researchers and clinicians to design dielectric padsefficiently on standard computer systems, for 7T neuroimaging and 3T bodyimaging applications. Methods: The tool incorporates advanced computationalmethods based on field decomposition and model order reduction as a frameworkto efficiently evaluate the B1+ fields resulting from dielectric pads. The toolfurther incorporates an optimization routine to perform either straightforwarddesign for one or two pads based on a target field approach, or a trade-offanalysis between homogeneity and efficiency of the B1+ field in a specificregion of interest. The 3T version further allows for shifting of the imaginglandmark to enable different imaging targets to be centered in the bodycoil.Results: Example design results are shown for imaging the inner ear at 7Tand for cardiac imaging at 3T. Computation times for all cases were under acouple of minutes. The change in homogeneity and efficiency with the pad'sdimensions, location, and constitution are clearly listed. Conclusion: Thedeveloped tool can be easily used to design pads for any 7T neuroimaging and 3Tbody imaging application within minutes. This bridges the gap between theadvanced design methods and the practical application by the MR community.

High-Permittivity Pad Design Tool for 7T Neuroimaging and 3T Body Imaging