Pre- and posttreatment capillary transit time heterogeneity and cerebral blood flow maps of peritumoral and contralateral regions of interest during phenylephrine and ephedrine treatment. The color bar indicates the spectrum from low to high values of capillary transit time heterogeneity and cerebral blood flow. The contralateral hemisphere region of interest is outlined with black, and the peritumoral region of interest is outlined with orange.