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Abstract #0580

Increasing Peripheral Nerve Stimulation Thresholds Using Gradient Array Coils

Reza Babaloo1,2, Manouchehr Takrimi2, and Ergin Atalar1,2
1Department of Electrical and Electronics Engineering, Bilkent University, Ankara, Turkey, 2National Magnetic Resonance Research Center (UMRAM), Bilkent University, Ankara, Turkey


Recent high-performance gradient coil designs are primarily limited by Peripheral Nerve Stimulation thresholds rather than hardware. Electrical fields induced by gradient switching may stimulate nerves within the human body if they exceed predefined thresholds. Gradient array coils can reduce the maximum electric field by optimizing feeding currents while generating the desired magnetic field profile within a specified region of interest. Another degree of freedom provided by array configuration is the ability to generate a flexible shaped region of interest, which allows for electrical fields manipulation to increase peripheral nerve stimulation thresholds.

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