Real-time fMRI-based activation analysis and stimulus control

A new concept of a unified parameter management, experiment control, and data analysis in fMRI: Application to real-time fMRI at 3T and 7T

“…The reference function is thereby defined by three parameters specifying the overshoot and the undershoot, respectively: the time to peak (tPeak) in s, the full width at half maximum (mWidth) in s, and a scale parameter defining the relation of the peak size of over-and undershoot. To analyze the incoming data for each time step a sliding window with a constant size is selected (see Moench et al, 2007;Hollmann et al, 2007 for a more detailed description). This technique is used if the system has to react to changing brain activation patterns of the subject during the experiment.…”