Keywords: Safety, Safety
Motivation: Investigating optimised RF heating and B1+ field disturbance with sEEG electrodes placement, covering epileptogenic zones in five configurations, using electromagnetic simulations with 16-channel parallel-transmit coil array at 3T for simultaneous sEEG-MRI.
Goal(s): The challenge is reducing RF heating from implanted electrodes.
Approach: We investigated five electrode placements covering epileptogenic zones to control RF heating and local signal increases using computational field simulations on a realistic computational human model.
Results: Implanting electrodes in the left hemisphere improved RF uniformity. Shimming optimisation, integrating B1+ and 0.1g SAR, showed negligible SAR differences from electrode-free setups. Lower SAR correlated with reduced RF strength, suggesting a necessary trade-off.
Impact: Our study advances simultaneous EEG/fMRI for drug-resistant epilepsy, optimising electrode safety to better localise seizure onset zones and refine surgical approaches, while ensuring patient safety. It allows for more precise epileptogenic zone resection, potentially advancing therapeutic outcomes.
How to access this content:
For one year after publication, abstracts and videos are only open to registrants of this annual meeting. Registrants should use their existing login information. Non-registrant access can be purchased via the ISMRM E-Library.
After one year, current ISMRM & ISMRT members get free access to both the abstracts and videos. Non-members and non-registrants must purchase access via the ISMRM E-Library.
After two years, the meeting proceedings (abstracts) are opened to the public and require no login information. Videos remain behind password for access by members, registrants and E-Library customers.
Keywords