Abstract #2236

Scanner-specific verification of Transmit RF Body Coil B1-field to inform clinical triage of patients with implanted devices

Chi Ma¹, Krzysztof R Gorny¹, Christopher P Favazza¹, Robert E Watson¹, and Heidi A Edmonson¹

¹Radiology, Mayo Clinic, Rochester, MN, United States

Exclusion of scanning with transmit RF body coil may prohibit access to life-saving diagnoses for patients with MR-conditional implantable devices. Manufacturer provided plots of RF B1-field indicate that RF energy over the implant may be significantly reduced if the implant is kept outside of the 50-55cm long transmit RF body coil. Scanner-specific B1-field measurements and RF-induced heating measurements confirm reduction in heating as conductive material moves away from scanner isocenter. B1-field measurements lateral to the central scanner axis demonstrate local peaks in the B1-field that would not be identified from the IEC-required manufacturer plots.

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