Safety and EEG data quality of concurrent high-density EEG and high-speed fMRI at 3 Tesla.

ABSTRACT:

Purpose

Concurrent EEG and fMRI is increasingly used to characterize the spatial-temporal dynamics of brain activity. However, most studies to date have been limited to conventional echo-planar imaging (EPI). There is considerable interest in integrating recently developed high-speed fMRI methods with high-density EEG to increase temporal resolution and sensitivity for task-based and resting state fMRI, and for detecting interictal spikes in epilepsy. In the present study using concurrent high-density EEG and recently developed high-speed fMRI methods, we investigate safety of radiofrequency (RF) related heating, the effect of EEG on cortical signal-to-noise ratio (SNR) in fMRI, and assess EEG data quality.

Materials and methods

The study compared EPI, multi-echo EPI, multi-

SUBMITTER: Foged MT 

PROVIDER: S-EPMC5446172 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature