FIG 2. Outcome versus posttreatment SPECT findings of both tracers. Count densities of the ROIs on the affected side were classified as hypoactivity, hyperactivity, or isoactivity if the A/C ratio was below 0.9, above 1.1, or 0.9 to 1.1, respectively. Open circles represent noninfarction; gray circles, infarction; black circles, hemorrhage