CNR2 and ischemic stroke: The present increase in [11C]NE40 binding, but not [11C](R)PK11195 binding concomitant with a higher CB2 immunochemical expression within the microglia over the peri-infarct region early after PIT injury, indicates that acutely activated microglia in early-stage ischemic stroke might be involved in the neuroprotective process of neuroinflammation.