Optical E-Field Measurements in the MR Environment with High Spatial Resolution

The accurate and localized measurement of electric fields in MRI is very important to assess RF safety hazards. In this work we present a purely optical sensor which is substantially smaller than existing dipoles to measure E-fields with high spatial resolution in a clinical MR system. This sensor allows for MR-safety inspections of RF coils and even for E-field assessment of small metallic structures such as implants or catheters in the MRI environment.

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