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Single shot concentric shells trajectories for ultra fast fMRI

MR‐encephalography is a technique that allows real‐time observation of functional changes in the brain with a time‐resolution of 100 ms. The high sampling rate is enabled by the use of undersampled image acquisition with regularized reconstruction. The article describes a novel imaging method for fast three‐dimensional‐MR‐encephalography whole brain coverage based on undersampled, single‐shot concentric shells trajectories and the use of multiple small receiver coils. The technique allows the observation of changes in blood oxygenation level dependent signal as a measure of brain physiology at very high temporal resolution. Magn Reson Med, 2012. © 2011 Wiley Periodicals, Inc.