next up previous contents
Next: perm params Up: Tool Description Previous: stim params   Contents

gamma params

The parameters in this dialog menu provide inital estimates and scalings for the bolus fitting based perfusion analysis. The $minimum t0$ parameter defines the region of the data (stating from zero) used to determine the basline for the fitted curve. The $recirculation cut$ parameter is used to define the cut off point for the curve fit (proportion of peak height) used to eliminate recirculation effects. The $recirculation period $ parameter is used to define the interval over which excess of data due to recirculation is estimated.

The region fit button can be used to estimate $average mtt$ and $minimum t0$ from all of the data within a region defined by a binary mask stored on the top of the imcalc stack. This should be done prior to regional analysis.

root 2019-05-21