Distribution of the animals in the experimental groups.

*Sprague-Dawley (SD) rats only.†In bracket, two SD rats showed no significant infarct by immunohistochemistry examination.#Wistar rats only.‡Rats were scanned sequentially with [11C]PK11195 and [18F]DPA-714; six rats were scanned first with [11C]PK11195 then [18F]DPA-714 and three rats were scanned first with [18F]DPA-714 then [11C]PK11195.