Keywords: Multimodal, Safety, EEG-fMRI
Motivation: EEG-fMRI at 7T can provide very high temporal and spatial resolution, allowing non-invasive investigation of human brain function at the meso-scale. However, it presents challenges: shorter RF wavelengths may increase coupling to the EEG cap, potentially leading to B1+ shielding and increased SAR deposition.
Goal(s): We investigated two iterations of a novel EEG cap designed to avoid RF coupling at 7T
Approach: B1+ maps with and without EEG cap were compared to investigate shielding. Temperature changes throughout scanning duration were analysed.
Results: Minimal heating at EEG electrodes was found, providing evidence that the risk of significant heating is low. B1+ were moderate.
Impact: Presently, EEG-fMRI is limited by fMRI sensitivity. EEG-fMRI at 7T offers a solution to this, because fMRI signal changes are substantially increased in magnitude. This could dramatically improve the technique’s sensitivity and spatial specificity for presurgical epilepsy evaluation.
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