This set of buttons provide regional analysis of temporal sequences for the extraction of quantitative parameters relating to voxel level perfusion of tissue. It is intended to provide support for the ``net-flow'' approach developed in our group (Tina memo 2001-003).
gamma fit fits a gamma variant to the timecourse at each pixel location. The selected parameter choice option TTM, CBV, MTT, ERR, RCC (time to mean, cerebral blood volume, mean transit time, residual error, or recirculation contribution) determines which of these parametric descriptions of the data to push onto the imcalc stack. The initital execution of gamma fit requires several seconds of processor time. All parametric images reulting from that analysis are subsequently available instantly upon selection with the choice menu.